Coolant temperature weirdness

Bernie Benz b.benz at
Fri Mar 5 16:05:44 EST 2004

So, what's your complaint, just that the temp gage reads low?  That's not
too bad, if it reads consistently low.  The MFTS usually fails in an
intermittent fashion, gage reading back and forth between zero and some
actual temp.


> From: mallick at
> Date: Fri,  5 Mar 2004 11:34:07 -0600
> To: 200q20v at
> Subject: Coolant temperature weirdness
> I thought I had this figured out, but the fix didn't work...
> My coolant temp seems to be a little sits below the first "fat" mark
> on
> the temperature guage.  At highway speeds is drops even lower, to the next
> lower "slim" mark.  Sitting in traffic it will reach the fat mark and I can
> hear the fan cycle on and off.
> It sure looked like the thermostat was stuck open, so I had it replaced with a
> brand new 'stat (87C).  The old one looked fine.   The car still behaves the
> same way it did with the old 'stat.  I dunno.  Maybe MFTS flakiness??
> The only other change is that the water pump is brand new, done with the
> t-belt
> change.  Coolant has been flushed and re-filled, to no effect (not that I
> thought it would).
> Any ideas?
> TIA,
> John Mallick
> 175K and counting....
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