You may have changed the O2. This will change the fuel/air witch
   will cause the motor to run hotter/cooler.

On Wed, 13 Aug 1997, Montana Bowhunters Association wrote:

> I just recently returned my 87GL to an original exhaust system.  PO had
> installed generic junk welded in place.  May be just concidence but now the
> van is running hotter.  Temp indicator is just on the hi side of the
> blinker.  Anyone have an explanation why a new muffler would cause
> increased running temp?  Should I be looking elswhere for a problem or is
> this not even a problem?
> 
> Dave Stratton
> Great Falls, MT
> 
>