C2, things that go bump in the night (and day)!

brumbach · 03-24-04, 07:29 PM

I hear and feel what I believe is the exhaust bumping beneath the floor board when I drive. I don't have side pipes. Everything seems solidly attached when I examine. Have you had similar experiences and if so, what can be done to correct? Thanks -- Bill

67HEAVEN · 03-24-04, 07:33 PM

Could be the rear U-joint on the driveshaft if the pinion snubber is getting sloppy. Check for marks on the floor above the joint with a flashlight. Check for too much play.

attret00 · 03-24-04, 07:54 PM

I had the same problem at one time. My exhaust would sometimes bump against the spare tire holder.

brumbach · 03-24-04, 08:20 PM

The bumping is far forward of the spare tire holder. It feels as though it's right below my feet.

brumbach · 03-24-04, 08:21 PM

Thanks. I'll give it a look.

studiog · 03-24-04, 08:32 PM

Could it be where the exhaust pipes go through the forward cross member? Can you tell if it is coming from the left or right side? If it is at this point it is probably hitting on the bottom of the opening. Maybe you could try putting a small wedge of some kind in there a go for a quick test drive. Just remember the wedge will get very hot. Good luck!

ßill · 03-24-04, 10:10 PM

Could it be a broken motor mount? That would allow every thing to rotate to the right. The Idea of the flash light and looking for scuff marks is the way to go.

brumbach · 03-25-04, 05:26 AM

Quote:

Originally Posted by studiog

Could it be where the exhaust pipes go through the forward cross member? Can you tell if it is coming from the left or right side? If it is at this point it is probably hitting on the bottom of the opening. Maybe you could try putting a small wedge of some kind in there a go for a quick test drive. Just remember the wedge will get very hot. Good luck!

Feels like it's on the drivers side.

brumbach · 03-25-04, 06:33 AM

Quote:

Originally Posted by ßill

Could it be a broken motor mount? That would allow every thing to rotate to the right. The Idea of the flash light and looking for scuff marks is the way to go.

If it is, would this be something that a layman, such as me, could correct?

brumbach · 03-25-04, 06:35 AM

Quote:

Originally Posted by 67HEAVEN

Could be the rear U-joint on the driveshaft if the pinion snubber is getting sloppy. Check for marks on the floor above the joint with a flashlight. Check for too much play.

I'll check it out. Thanks

BLACK MOON · 03-25-04, 07:30 PM

Turn up the radio like I do. LOL

magicv8 · 03-25-04, 11:05 PM

Aside from all the great advice you have already gotten - one more thing: When the floor on these old cars sag a little, it is possible for the seat bolt above the exhaust pipe to hit the pipe as the car takes bumps. Shorten the bolt.