Just back from a 1200 mile trip on which we passed 10 k. Its a 6 cyl
and I know this may not sound right but in the flatlands of VA and DE
we were getting 28 mph (spiked up to 29 once??) at 60-65 with AC on
low, no kidding (or at least thats what the trip computer said). My
questions concerns annoying wheel well thumps that we heard peridically
thru the trip. Sounded like a peice of soft debris being thrown up
into the well. While I was driving I did not notice any debris behind
the car on the road when I heard it. Although I imagine it is possible
it was some foriegn object I wondered if this might be some type of
thermal expansion (we were coming and going from extended wooded areas
into open sunny farm lands) on the roof or some other part of the car.
Anybody have something similar going on?..............Doc

 

On 12 Jun 2006 08:08:56 -0700, Dr.Colon.Oscopy@gmail.com wrote:

>Just back from a 1200 mile trip on which we passed 10 k. Its a 6 cyl
>and I know this may not sound right but in the flatlands of VA and DE
>we were getting 28 mph (spiked up to 29 once??) at 60-65 with AC on
>low, no kidding (or at least thats what the trip computer said). My
>questions concerns annoying wheel well thumps that we heard peridically
>thru the trip. Sounded like a peice of soft debris being thrown up
>into the well. While I was driving I did not notice any debris behind
>the car on the road when I heard it. Although I imagine it is possible
>it was some foriegn object I wondered if this might be some type of
>thermal expansion (we were coming and going from extended wooded areas
>into open sunny farm lands) on the roof or some other part of the car.
>Anybody have something similar going on?..............Doc

Welcome to the Ka-Thunk club Doc. :\

If we're talking about the same sound, I hear it mostly on rough streets
while driving slowly. Sounds like it's coming from between the rear wheels.

One owner stated his dealer told him it was a shock mounting pad issue, and
would be addressed by Hyundai. Heard nothing back on it so far.

Another owner stated his emergency brake cable was loose, and rapping
against the floor pan. He could see a slight mark against the undercoating
where the cable was hitting. He secured it with a zip tie, heard nothing
back on it so far.

Personally, I slid underneath my car and hit against the fuel tank bottom
with the heel of my hand. It made a very familiar sounding "ka-thunk" sound,
even with the lightest bump. I just don't know if that's it or not. If I had
a lift, I would stuff things in there and try to stabilize it. If's and
but's!

Bottom line, if it's the noise I think it is, it should be brought in to
your dealer for resolution. *


*I brought mine in, but the dealer was too busy that day, a huge
thunderstorm came up with power blinking, and I just wanted to go home.
--
Bob

 

On 12 Jun 2006 08:08:56 -0700, Dr.Colon.Oscopy@gmail.com wrote:

>Just back from a 1200 mile trip on which we passed 10 k. Its a 6 cyl
>and I know this may not sound right but in the flatlands of VA and DE
>we were getting 28 mph (spiked up to 29 once??) at 60-65 with AC on
>low, no kidding (or at least thats what the trip computer said). My
>questions concerns annoying wheel well thumps that we heard peridically
>thru the trip. Sounded like a peice of soft debris being thrown up
>into the well. While I was driving I did not notice any debris behind
>the car on the road when I heard it. Although I imagine it is possible
>it was some foriegn object I wondered if this might be some type of
>thermal expansion (we were coming and going from extended wooded areas
>into open sunny farm lands) on the roof or some other part of the car.
>Anybody have something similar going on?..............Doc

Welcome to the Ka-Thunk club Doc. :\

If we're talking about the same sound, I hear it mostly on rough streets
while driving slowly. Sounds like it's coming from between the rear wheels.

One owner stated his dealer told him it was a shock mounting pad issue, and
would be addressed by Hyundai. Heard nothing back on it so far.

Another owner stated his emergency brake cable was loose, and rapping
against the floor pan. He could see a slight mark against the undercoating
where the cable was hitting. He secured it with a zip tie, heard nothing
back on it so far.

Personally, I slid underneath my car and hit against the fuel tank bottom
with the heel of my hand. It made a very familiar sounding "ka-thunk" sound,
even with the lightest bump. I just don't know if that's it or not. If I had
a lift, I would stuff things in there and try to stabilize it. If's and
but's!

Bottom line, if it's the noise I think it is, it should be brought in to
your dealer for resolution. *


*I brought mine in, but the dealer was too busy that day, a huge
thunderstorm came up with power blinking, and I just wanted to go home.
--
Bob

 

On 12 Jun 2006 08:08:56 -0700, Dr.Colon.Oscopy@gmail.com wrote:

>Just back from a 1200 mile trip on which we passed 10 k. Its a 6 cyl
>and I know this may not sound right but in the flatlands of VA and DE
>we were getting 28 mph (spiked up to 29 once??) at 60-65 with AC on
>low, no kidding (or at least thats what the trip computer said). My
>questions concerns annoying wheel well thumps that we heard peridically
>thru the trip. Sounded like a peice of soft debris being thrown up
>into the well. While I was driving I did not notice any debris behind
>the car on the road when I heard it. Although I imagine it is possible
>it was some foriegn object I wondered if this might be some type of
>thermal expansion (we were coming and going from extended wooded areas
>into open sunny farm lands) on the roof or some other part of the car.
>Anybody have something similar going on?..............Doc

Welcome to the Ka-Thunk club Doc. :\

If we're talking about the same sound, I hear it mostly on rough streets
while driving slowly. Sounds like it's coming from between the rear wheels.

One owner stated his dealer told him it was a shock mounting pad issue, and
would be addressed by Hyundai. Heard nothing back on it so far.

Another owner stated his emergency brake cable was loose, and rapping
against the floor pan. He could see a slight mark against the undercoating
where the cable was hitting. He secured it with a zip tie, heard nothing
back on it so far.

Personally, I slid underneath my car and hit against the fuel tank bottom
with the heel of my hand. It made a very familiar sounding "ka-thunk" sound,
even with the lightest bump. I just don't know if that's it or not. If I had
a lift, I would stuff things in there and try to stabilize it. If's and
but's!

Bottom line, if it's the noise I think it is, it should be brought in to
your dealer for resolution. *


*I brought mine in, but the dealer was too busy that day, a huge
thunderstorm came up with power blinking, and I just wanted to go home.
--
Bob

 

Update on the K-thunk. Below is an update from an owner I mentioned in my
previous post.

Begin Quoted Text:

Just an update.
We put 600 miles on the Sonata this weekend with about half being interstate
and the other half being rough roads. We had no more thumps. Actually the
front suspension was louder than the rear. At one stop I reached up under
the drivers side rear wheel and cut the zip tie off the brake cable since
that was the side that had the most marks on the under body. Guess what,
thump was back. I put a new zip tie back on it and no more thumping. Good
enough for me, until I can figure out a more permanent method of keeping the
cable off the body. Good luck people with your thumps in the night.

End Quoted Text


It sounds pretty promising, but I can't believe it's that darn simple!

Anyone else have news from dealers or personally investigating the noise?
--
Bob

 

Update on the K-thunk. Below is an update from an owner I mentioned in my
previous post.

Begin Quoted Text:

Just an update.
We put 600 miles on the Sonata this weekend with about half being interstate
and the other half being rough roads. We had no more thumps. Actually the
front suspension was louder than the rear. At one stop I reached up under
the drivers side rear wheel and cut the zip tie off the brake cable since
that was the side that had the most marks on the under body. Guess what,
thump was back. I put a new zip tie back on it and no more thumping. Good
enough for me, until I can figure out a more permanent method of keeping the
cable off the body. Good luck people with your thumps in the night.

End Quoted Text


It sounds pretty promising, but I can't believe it's that darn simple!

Anyone else have news from dealers or personally investigating the noise?
--
Bob

 

Update on the K-thunk. Below is an update from an owner I mentioned in my
previous post.

Begin Quoted Text:

Just an update.
We put 600 miles on the Sonata this weekend with about half being interstate
and the other half being rough roads. We had no more thumps. Actually the
front suspension was louder than the rear. At one stop I reached up under
the drivers side rear wheel and cut the zip tie off the brake cable since
that was the side that had the most marks on the under body. Guess what,
thump was back. I put a new zip tie back on it and no more thumping. Good
enough for me, until I can figure out a more permanent method of keeping the
cable off the body. Good luck people with your thumps in the night.

End Quoted Text


It sounds pretty promising, but I can't believe it's that darn simple!

Anyone else have news from dealers or personally investigating the noise?
--
Bob

 

I had a 2000 and 2002 Sonata with the same problem. It turned out to be
the rear suspension / shocks ; it was very annoying and happened all
the time. Got the District Hyundai Mgn involved and in an attempt to
make it better, he had oil filled shocks put on and it greatly improved
things. Also, consider adding some 3/8" thick insulation roll from J.C.
Whitney.com above the wheel well plastic liners to muffle noise ; it
worked out well on other cars ive done. You have to remove the wheel
then the Liner , but its a pretty easy job. Then glue some insulation
roll down after cutting it to size. Also put some in the cargo area
under the carpetting on the inside of the vehicle .

 

I had a 2000 and 2002 Sonata with the same problem. It turned out to be
the rear suspension / shocks ; it was very annoying and happened all
the time. Got the District Hyundai Mgn involved and in an attempt to
make it better, he had oil filled shocks put on and it greatly improved
things. Also, consider adding some 3/8" thick insulation roll from J.C.
Whitney.com above the wheel well plastic liners to muffle noise ; it
worked out well on other cars ive done. You have to remove the wheel
then the Liner , but its a pretty easy job. Then glue some insulation
roll down after cutting it to size. Also put some in the cargo area
under the carpetting on the inside of the vehicle .

 

I had a 2000 and 2002 Sonata with the same problem. It turned out to be
the rear suspension / shocks ; it was very annoying and happened all
the time. Got the District Hyundai Mgn involved and in an attempt to
make it better, he had oil filled shocks put on and it greatly improved
things. Also, consider adding some 3/8" thick insulation roll from J.C.
Whitney.com above the wheel well plastic liners to muffle noise ; it
worked out well on other cars ive done. You have to remove the wheel
then the Liner , but its a pretty easy job. Then glue some insulation
roll down after cutting it to size. Also put some in the cargo area
under the carpetting on the inside of the vehicle .

 

Dave in Lake Villa wrote:

> I had a 2000 and 2002 Sonata with the same problem. It turned out to be
> the rear suspension / shocks ; it was very annoying and happened all
> the time. Got the District Hyundai Mgn involved and in an attempt to
> make it better, he had oil filled shocks put on and it greatly improved
> things. Also, consider adding some 3/8" thick insulation roll from J.C.
> Whitney.com above the wheel well plastic liners to muffle noise ; it
> worked out well on other cars ive done. You have to remove the wheel
> then the Liner , but its a pretty easy job. Then glue some insulation
> roll down after cutting it to size. Also put some in the cargo area
> under the carpetting on the inside of the vehicle .
>

Is the wheel well plastic?

Matt

 

Dave in Lake Villa wrote:

> I had a 2000 and 2002 Sonata with the same problem. It turned out to be
> the rear suspension / shocks ; it was very annoying and happened all
> the time. Got the District Hyundai Mgn involved and in an attempt to
> make it better, he had oil filled shocks put on and it greatly improved
> things. Also, consider adding some 3/8" thick insulation roll from J.C.
> Whitney.com above the wheel well plastic liners to muffle noise ; it
> worked out well on other cars ive done. You have to remove the wheel
> then the Liner , but its a pretty easy job. Then glue some insulation
> roll down after cutting it to size. Also put some in the cargo area
> under the carpetting on the inside of the vehicle .
>

Is the wheel well plastic?

Matt

 

Dave in Lake Villa wrote:

> I had a 2000 and 2002 Sonata with the same problem. It turned out to be
> the rear suspension / shocks ; it was very annoying and happened all
> the time. Got the District Hyundai Mgn involved and in an attempt to
> make it better, he had oil filled shocks put on and it greatly improved
> things. Also, consider adding some 3/8" thick insulation roll from J.C.
> Whitney.com above the wheel well plastic liners to muffle noise ; it
> worked out well on other cars ive done. You have to remove the wheel
> then the Liner , but its a pretty easy job. Then glue some insulation
> roll down after cutting it to size. Also put some in the cargo area
> under the carpetting on the inside of the vehicle .
>

Is the wheel well plastic?

Matt

 

On Wed, 21 Jun 2006 11:34:44 -0500, DaveInLakeVilla@webtv.net (Dave in Lake
Villa) wrote:
>things. Also, consider adding some 3/8" thick insulation roll from J.C.
>Whitney.com above the wheel well plastic liners to muffle noise ; it
>worked out well on other cars ive done. You have to remove the wheel
>then the Liner , but its a pretty easy job. Then glue some insulation
>roll down after cutting it to size. Also put some in the cargo area
>under the carpetting on the inside of the vehicle .

Hmmmm... if the waxy undercoating was applied under the wheel well, I wonder
of the sound mat would even stick? If not, maybe just some of that foamy tar
undercoating would help deaden the noise a lot.

I know the sound deadening mat would help some, but the metal foil coating
is most effective when oriented toward the cabin, right? In other words, it
would work best if you could apply it to the wheel well from inside the car.
Oy, I bet that would be a major job...
--
Bob

 

On Wed, 21 Jun 2006 11:34:44 -0500, DaveInLakeVilla@webtv.net (Dave in Lake
Villa) wrote:
>things. Also, consider adding some 3/8" thick insulation roll from J.C.
>Whitney.com above the wheel well plastic liners to muffle noise ; it
>worked out well on other cars ive done. You have to remove the wheel
>then the Liner , but its a pretty easy job. Then glue some insulation
>roll down after cutting it to size. Also put some in the cargo area
>under the carpetting on the inside of the vehicle .

Hmmmm... if the waxy undercoating was applied under the wheel well, I wonder
of the sound mat would even stick? If not, maybe just some of that foamy tar
undercoating would help deaden the noise a lot.

I know the sound deadening mat would help some, but the metal foil coating
is most effective when oriented toward the cabin, right? In other words, it
would work best if you could apply it to the wheel well from inside the car.
Oy, I bet that would be a major job...
--
Bob