[V8] Exhaust re-installed, but now we have vibration at idle

[Ingo Rautenberg]

Engine mounts?  There's no bloody way they touched the engine mounts
(they're by the headers).
If you have a bad engine mount, then you can have a vibration when you fev
the car under load, as
the exhasut will twist with the engine and could contact parts of the
underside of the car and/or center drive shaft. BTST.

Maybe the trans mounts?

There's also the exhaust clamps that go to the sides of the tranny iirc.
They have rubber noise isolating-bushings iirc, too.

Ingo

On Wed, Feb 17, 2010 at 8:10 PM, Mark Kalbskopf <gbmarc at cox.net> wrote:

> This local shop just welded a new center section onto my very loud
> exhaust.
> They had to remove the exhaust to do it, and muttered something about
> removing engine mounts to get the exhaust off.
> I just picked the car up, and now I have this vibration of the whole
> car at idle that I'm sure wasn't there before.
> I haven't had a chance to look underneath, but what mounts were they
> referring to? and how could they mess up the re-attachment?
> There's no clanging sound or anything, just a pronounced higher
> frequency vibration throughout the car.
> When I accelerate, it diminishes.
>
> Mark.
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