ZC Engine
12-17-2003 | 01:33 PM
#1
Guest
Posts: n/a
ZC Engine
I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
Everything is working all right. No loss of power, performance or anything.
However, I can hear this dull knocking noise when the engine is running. I
am pretty sure it is not the timing or the gas I am running (timing set to
16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
I never heard what piston slap sounds like. By the way, the sound is always
there, whether the car is cold or at normal temperature. I did a
compression test and here are the results (from cylinder 1 to 4):
150psi, 184psi,182psi,184psi
I did some more testing on cylinder 1 and the pressure build up quickily
during the first two strokes but at the third stroke the pressure maxed out
and further strokes only increased the pressure buildup marginally. After
this I added three squirts of oils through the spark plug hole and retested,
and the pressure came out to be the same. No increase. I thought I might
have been hearing piston slap at cylinder 1, but I guess this means it is
probably not the piston rings? Could the noise come from one the
accessories? Could it be the valve or the camshaft?
Thanks in advance for any help,
- JR
Everything is working all right. No loss of power, performance or anything.
However, I can hear this dull knocking noise when the engine is running. I
am pretty sure it is not the timing or the gas I am running (timing set to
16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
I never heard what piston slap sounds like. By the way, the sound is always
there, whether the car is cold or at normal temperature. I did a
compression test and here are the results (from cylinder 1 to 4):
150psi, 184psi,182psi,184psi
I did some more testing on cylinder 1 and the pressure build up quickily
during the first two strokes but at the third stroke the pressure maxed out
and further strokes only increased the pressure buildup marginally. After
this I added three squirts of oils through the spark plug hole and retested,
and the pressure came out to be the same. No increase. I thought I might
have been hearing piston slap at cylinder 1, but I guess this means it is
probably not the piston rings? Could the noise come from one the
accessories? Could it be the valve or the camshaft?
Thanks in advance for any help,
- JR
12-17-2003 | 01:48 PM
#2
Guest
Posts: n/a
Re: ZC Engine
I use an automotive stethoscope to find strange knocks. Most auto parts
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
12-17-2003 | 01:48 PM
#3
Guest
Posts: n/a
Re: ZC Engine
I use an automotive stethoscope to find strange knocks. Most auto parts
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
12-17-2003 | 01:48 PM
#4
Guest
Posts: n/a
Re: ZC Engine
I use an automotive stethoscope to find strange knocks. Most auto parts
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
12-17-2003 | 01:48 PM
#5
Guest
Posts: n/a
Re: ZC Engine
I use an automotive stethoscope to find strange knocks. Most auto parts
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
stores sell them cheap.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR Lomas wrote:
>
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or anything.
> However, I can hear this dull knocking noise when the engine is running. I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> I never heard what piston slap sounds like. By the way, the sound is always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
12-17-2003 | 11:34 PM
#6
Guest
Posts: n/a
Re: ZC Engine
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
It sounds like the rings on cylinder 1 are not sealing properly (as the wet
compression test brought compression up to the other cylinders). Valve
problems typically show no compression, low compression is typically
indicative of rings.
-Bruce
12-17-2003 | 11:34 PM
#7
Guest
Posts: n/a
Re: ZC Engine
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
It sounds like the rings on cylinder 1 are not sealing properly (as the wet
compression test brought compression up to the other cylinders). Valve
problems typically show no compression, low compression is typically
indicative of rings.
-Bruce
12-17-2003 | 11:34 PM
#8
Guest
Posts: n/a
Re: ZC Engine
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
It sounds like the rings on cylinder 1 are not sealing properly (as the wet
compression test brought compression up to the other cylinders). Valve
problems typically show no compression, low compression is typically
indicative of rings.
-Bruce
12-17-2003 | 11:34 PM
#9
Guest
Posts: n/a
Re: ZC Engine
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
It sounds like the rings on cylinder 1 are not sealing properly (as the wet
compression test brought compression up to the other cylinders). Valve
problems typically show no compression, low compression is typically
indicative of rings.
-Bruce
12-17-2003 | 11:59 PM
#10
Guest
Posts: n/a
Re: ZC Engine
I just bought a automotive stethoscope and listened to the engine. I
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
12-17-2003 | 11:59 PM
#11
Guest
Posts: n/a
Re: ZC Engine
I just bought a automotive stethoscope and listened to the engine. I
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
12-17-2003 | 11:59 PM
#12
Guest
Posts: n/a
Re: ZC Engine
I just bought a automotive stethoscope and listened to the engine. I
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
12-17-2003 | 11:59 PM
#13
Guest
Posts: n/a
Re: ZC Engine
I just bought a automotive stethoscope and listened to the engine. I
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
can't be sure, but it seems like the sound is strongest when I place
it on the engine block near the bottom where the #1 piston is. The
waterpump, however is very close to it, so it is hard to tell whether
is the waterpump or piston slap. I'd say, nonetheless, it DOES sound
like it is the piston slapping against the block. What do you guys
think? Any ideas to try to pinpoint it? Should I be worried if it IS
piston slap. I just swap this engine into the car and I would hate to
have to yet swap it again.
- JR
Mike Romain <romainm@sympatico.ca> wrote in message news:<3FE0A4FC.2167DF24@sympatico.ca>...
> I use an automotive stethoscope to find strange knocks. Most auto parts
> stores sell them cheap.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> JR Lomas wrote:
> >
> > I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> > Everything is working all right. No loss of power, performance or anything.
> > However, I can hear this dull knocking noise when the engine is running. I
> > am pretty sure it is not the timing or the gas I am running (timing set to
> > 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the again
> > I never heard what piston slap sounds like. By the way, the sound is always
> > there, whether the car is cold or at normal temperature. I did a
> > compression test and here are the results (from cylinder 1 to 4):
> > 150psi, 184psi,182psi,184psi
> > I did some more testing on cylinder 1 and the pressure build up quickily
> > during the first two strokes but at the third stroke the pressure maxed out
> > and further strokes only increased the pressure buildup marginally. After
> > this I added three squirts of oils through the spark plug hole and retested,
> > and the pressure came out to be the same. No increase. I thought I might
> > have been hearing piston slap at cylinder 1, but I guess this means it is
> > probably not the piston rings? Could the noise come from one the
> > accessories? Could it be the valve or the camshaft?
> > Thanks in advance for any help,
> >
> > - JR
12-18-2003 | 01:07 PM
#14
Guest
Posts: n/a
Re: ZC Engine
You should do a good valve adjustment for the hell of it just to rule out
valve clatter. May be your timing belt is off one tooth? Take off your
accessory belts and check them for bad bearings or noise. It could be a
bent rod or valve even. It could be alot of things.
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
valve clatter. May be your timing belt is off one tooth? Take off your
accessory belts and check them for bad bearings or noise. It could be a
bent rod or valve even. It could be alot of things.
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
12-18-2003 | 01:07 PM
#15
Guest
Posts: n/a
Re: ZC Engine
You should do a good valve adjustment for the hell of it just to rule out
valve clatter. May be your timing belt is off one tooth? Take off your
accessory belts and check them for bad bearings or noise. It could be a
bent rod or valve even. It could be alot of things.
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>
valve clatter. May be your timing belt is off one tooth? Take off your
accessory belts and check them for bad bearings or noise. It could be a
bent rod or valve even. It could be alot of things.
"JR Lomas" <jrl@engineer.nu> wrote in message
news:m56dnaYJL5_nPH2iRVn-iw@comcast.com...
> I have a JDM ZC 1.6L engine I just put in my 1994 Honda Civic LX.
> Everything is working all right. No loss of power, performance or
anything.
> However, I can hear this dull knocking noise when the engine is running.
I
> am pretty sure it is not the timing or the gas I am running (timing set to
> 16 DB TDC and 92 octane). I'd say it sounds like piston slap but the
again
> I never heard what piston slap sounds like. By the way, the sound is
always
> there, whether the car is cold or at normal temperature. I did a
> compression test and here are the results (from cylinder 1 to 4):
> 150psi, 184psi,182psi,184psi
> I did some more testing on cylinder 1 and the pressure build up quickily
> during the first two strokes but at the third stroke the pressure maxed
out
> and further strokes only increased the pressure buildup marginally. After
> this I added three squirts of oils through the spark plug hole and
retested,
> and the pressure came out to be the same. No increase. I thought I might
> have been hearing piston slap at cylinder 1, but I guess this means it is
> probably not the piston rings? Could the noise come from one the
> accessories? Could it be the valve or the camshaft?
> Thanks in advance for any help,
>
> - JR
>
>