Hey all -

I just wanted to post the result of something that interested me. My
dad's 1991 350SDL has had a problem with heating beyond the operating
zone for quite some time, and without repairing anything else, the
replacement of the exhaust system elimintaed the problem. My mechanic
swore up and down that such a result is impossible, but he has to agree
that it is no longer running hot. The car has 169,000 miles on it, and
it was running the original exhaust system. We literally did nothing
else this time around other than replace the exhaust system from the
head pipe back.

Any idea why this should make the car run cooler because we have none?

Backpressure of the exhaust system... It was probably clogged from
something...

Sounds about right. I wonder what clogged it. Oh well, who cares, it's
gone. Thanks for the reply.

I don't know what clogged it... but someone could have done a prank on you
by stuffing the muffler with something...

Tiger wrote:
fun until it backfired.