My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
changed it and bleed the air out of the system. At the same time I changed
the radiator cap. Now after 15min drive, the coolant is boiling in the
reservoir but the engine is not overheating. The thermostat is two months
old, the fan is working.

Anyone know what it could be??

 

Luigi wrote:
>
> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

=======================

It's just trapped air expanding past the cap and bubbling into the
expansion tank. When the engine cools down, it will suck some of the
coolant into the rad and the level in the expansion tank will drop, so
you must check it tomorrow A.M.

'curly'

===============

 

Luigi wrote:
>
> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

=======================

It's just trapped air expanding past the cap and bubbling into the
expansion tank. When the engine cools down, it will suck some of the
coolant into the rad and the level in the expansion tank will drop, so
you must check it tomorrow A.M.

'curly'

===============

 

Luigi wrote:
>
> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

=======================

It's just trapped air expanding past the cap and bubbling into the
expansion tank. When the engine cools down, it will suck some of the
coolant into the rad and the level in the expansion tank will drop, so
you must check it tomorrow A.M.

'curly'

===============

 

To get the air out of the cooling system, wait for the engine to cool down
and remove the radiator cap. Make sure the coolant is level with the bottom
of the "radiator neck." If not add more coolant and make sure the coolant
mixture is 50/50). If it's already at the right level or you've filled it
enough, squeeze the top radiator hose to remove the air from the system and
also suck in the coolant. If there's air in the coolant system the level of
the coolant will drop so you have to add more coolant.

Let us know how it goes.

--Viktor

"'Curly Q. Links'" <motsco__@interbaun.com> wrote in message
news:403AA57E.33F92A19@interbaun.com...
> Luigi wrote:
> >
> > My girlfriend has a 89 civic si, the upper radiator hose blew yesterday
so I
> > changed it and bleed the air out of the system. At the same time I
changed
> > the radiator cap. Now after 15min drive, the coolant is boiling in the
> > reservoir but the engine is not overheating. The thermostat is two
months
> > old, the fan is working.
> >
> > Anyone know what it could be??
>
> =======================
>
> It's just trapped air expanding past the cap and bubbling into the
> expansion tank. When the engine cools down, it will suck some of the
> coolant into the rad and the level in the expansion tank will drop, so
> you must check it tomorrow A.M.
>
> 'curly'
>
> ===============

 

To get the air out of the cooling system, wait for the engine to cool down
and remove the radiator cap. Make sure the coolant is level with the bottom
of the "radiator neck." If not add more coolant and make sure the coolant
mixture is 50/50). If it's already at the right level or you've filled it
enough, squeeze the top radiator hose to remove the air from the system and
also suck in the coolant. If there's air in the coolant system the level of
the coolant will drop so you have to add more coolant.

Let us know how it goes.

--Viktor

"'Curly Q. Links'" <motsco__@interbaun.com> wrote in message
news:403AA57E.33F92A19@interbaun.com...
> Luigi wrote:
> >
> > My girlfriend has a 89 civic si, the upper radiator hose blew yesterday
so I
> > changed it and bleed the air out of the system. At the same time I
changed
> > the radiator cap. Now after 15min drive, the coolant is boiling in the
> > reservoir but the engine is not overheating. The thermostat is two
months
> > old, the fan is working.
> >
> > Anyone know what it could be??
>
> =======================
>
> It's just trapped air expanding past the cap and bubbling into the
> expansion tank. When the engine cools down, it will suck some of the
> coolant into the rad and the level in the expansion tank will drop, so
> you must check it tomorrow A.M.
>
> 'curly'
>
> ===============

 

To get the air out of the cooling system, wait for the engine to cool down
and remove the radiator cap. Make sure the coolant is level with the bottom
of the "radiator neck." If not add more coolant and make sure the coolant
mixture is 50/50). If it's already at the right level or you've filled it
enough, squeeze the top radiator hose to remove the air from the system and
also suck in the coolant. If there's air in the coolant system the level of
the coolant will drop so you have to add more coolant.

Let us know how it goes.

--Viktor

"'Curly Q. Links'" <motsco__@interbaun.com> wrote in message
news:403AA57E.33F92A19@interbaun.com...
> Luigi wrote:
> >
> > My girlfriend has a 89 civic si, the upper radiator hose blew yesterday
so I
> > changed it and bleed the air out of the system. At the same time I
changed
> > the radiator cap. Now after 15min drive, the coolant is boiling in the
> > reservoir but the engine is not overheating. The thermostat is two
months
> > old, the fan is working.
> >
> > Anyone know what it could be??
>
> =======================
>
> It's just trapped air expanding past the cap and bubbling into the
> expansion tank. When the engine cools down, it will suck some of the
> coolant into the rad and the level in the expansion tank will drop, so
> you must check it tomorrow A.M.
>
> 'curly'
>
> ===============

 

On of the best ways to bleed the air out of a cooling system on a Honda is
to use the bleeder valve. On an '89 Civic the bleeder valve is on the top
of the water pipe bolted to the left side of the head.

 

On of the best ways to bleed the air out of a cooling system on a Honda is
to use the bleeder valve. On an '89 Civic the bleeder valve is on the top
of the water pipe bolted to the left side of the head.

 

On of the best ways to bleed the air out of a cooling system on a Honda is
to use the bleeder valve. On an '89 Civic the bleeder valve is on the top
of the water pipe bolted to the left side of the head.

 

In article <uNw_b.4838$253.516529@news20.bellglobal.com>, "Luigi"
<luigi776@hotmail.com> wrote:

> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

You received some great advice. I just wanted to add that regardless of
how you solve the problem--you should check the radiator coolant level
about once a day (for the next two weeks) when the engine is cold and
refill it with a 50/50 mixture if it is low. Also, make sure the reservoir
is about half full. Once you find the level up to the cap for two straght
days--you won't have to check it anymore--your problem is solved and air
is now out of the system. Don't feel bad--you would be amazed how many so
called radiator experts that own or manage radiator shops make this same
mistake.

 

In article <uNw_b.4838$253.516529@news20.bellglobal.com>, "Luigi"
<luigi776@hotmail.com> wrote:

> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

You received some great advice. I just wanted to add that regardless of
how you solve the problem--you should check the radiator coolant level
about once a day (for the next two weeks) when the engine is cold and
refill it with a 50/50 mixture if it is low. Also, make sure the reservoir
is about half full. Once you find the level up to the cap for two straght
days--you won't have to check it anymore--your problem is solved and air
is now out of the system. Don't feel bad--you would be amazed how many so
called radiator experts that own or manage radiator shops make this same
mistake.

 

In article <uNw_b.4838$253.516529@news20.bellglobal.com>, "Luigi"
<luigi776@hotmail.com> wrote:

> My girlfriend has a 89 civic si, the upper radiator hose blew yesterday so I
> changed it and bleed the air out of the system. At the same time I changed
> the radiator cap. Now after 15min drive, the coolant is boiling in the
> reservoir but the engine is not overheating. The thermostat is two months
> old, the fan is working.
>
> Anyone know what it could be??

You received some great advice. I just wanted to add that regardless of
how you solve the problem--you should check the radiator coolant level
about once a day (for the next two weeks) when the engine is cold and
refill it with a 50/50 mixture if it is low. Also, make sure the reservoir
is about half full. Once you find the level up to the cap for two straght
days--you won't have to check it anymore--your problem is solved and air
is now out of the system. Don't feel bad--you would be amazed how many so
called radiator experts that own or manage radiator shops make this same
mistake.

 

"T. Nelson" <tnelson@nospam.com> wrote in message
news:tnelson-2402040926380001@pm2-broad-170.snlo.dialup.fix.net...
> In article <uNw_b.4838$253.516529@news20.bellglobal.com>, "Luigi"
> <luigi776@hotmail.com> wrote:
>
> > My girlfriend has a 89 civic si, the upper radiator hose blew yesterday
so I
> > changed it and bleed the air out of the system. At the same time I
changed
> > the radiator cap. Now after 15min drive, the coolant is boiling in the
> > reservoir but the engine is not overheating. The thermostat is two
months
> > old, the fan is working.
> >
> > Anyone know what it could be??

Yeah. Change the rad cap.


> You received some great advice. I just wanted to add that regardless of
> how you solve the problem--you should check the radiator coolant level
> about once a day (for the next two weeks) when the engine is cold and
> refill it with a 50/50 mixture if it is low. Also, make sure the reservoir
> is about half full. Once you find the level up to the cap for two straght
> days--you won't have to check it anymore--your problem is solved and air
> is now out of the system. Don't feel bad--you would be amazed how many so
> called radiator experts that own or manage radiator shops make this same
> mistake.

 

"T. Nelson" <tnelson@nospam.com> wrote in message
news:tnelson-2402040926380001@pm2-broad-170.snlo.dialup.fix.net...
> In article <uNw_b.4838$253.516529@news20.bellglobal.com>, "Luigi"
> <luigi776@hotmail.com> wrote:
>
> > My girlfriend has a 89 civic si, the upper radiator hose blew yesterday
so I
> > changed it and bleed the air out of the system. At the same time I
changed
> > the radiator cap. Now after 15min drive, the coolant is boiling in the
> > reservoir but the engine is not overheating. The thermostat is two
months
> > old, the fan is working.
> >
> > Anyone know what it could be??

Yeah. Change the rad cap.


> You received some great advice. I just wanted to add that regardless of
> how you solve the problem--you should check the radiator coolant level
> about once a day (for the next two weeks) when the engine is cold and
> refill it with a 50/50 mixture if it is low. Also, make sure the reservoir
> is about half full. Once you find the level up to the cap for two straght
> days--you won't have to check it anymore--your problem is solved and air
> is now out of the system. Don't feel bad--you would be amazed how many so
> called radiator experts that own or manage radiator shops make this same
> mistake.