[urq] exhaust bolts/nuts

[Renneisen, Eric 475]

Brandon Rogers wrote:
> The exhaust bolts/nuts on DP>cat and cat>center pipe seem 
> to loosen up once it all warms up - ends up rattling at high 
> rpm (most notably on shifts).

I have problem in the same area.  I have the factory test pipe instead
of a cat.  Everything's fine unless I drive through heavy rain.  I
suspect that the RF tire is throwing rainwater onto the exhaust and
causing it to shift around due to uneven heating/cooling.  It opens up
one of the connections to the test pipe, causing a loud exhaust leak.
It goes away as soon as I slow down, or if the rain lightens up.  I've
already tightened the bolts as far as I dare.  My next thought is to
replace the donut gaskets, but I'm not confident that'll do it.

Eric
'86 urq
'93 S4

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