the exhausts on both of my jettas, currently being dismantled, both
will move up enough to hit the frame ( about 4 inches at the end. when
the engines start you can see a torque movement of about 3/4 inch at
the engine.  move that leverage down to an exhaust  joint that doesnt
flex and it will snap.  this torque movement was noted on starting
engine not while engine was  running.  the  vehicle  with failing
engine mounts  flexes over an inch. not sure how these will translate
over to A2/A3 engines in the vanagons though.
jimt
On Monday, Sep 30, 2002, at 15:18 America/Denver, Bill Marshall wrote:

> OK, Frank, I bow to your superior knowledge of all things that
> vibrate.  I
> also see how the muffler being bolted directly to the engine could
> transfer
> some harmonics.  Here's my big question of the day:
>
> How much movement do these muffler mounts need to do the job?