Overheating n drilling the thermostat

[Edward J Kellock]

I'm having the same issue with my 89 200q.  I've replaced the Sierra
coolant with Pentosin coolant on the advice of a friend who has found
that the Pentosin runs much cooler than others.  I have found this to be
true as well, until the outside temp is way up, 90+.  Once the car gets
up to the bold mark at about 12:30, 1o'clock position, it doesn't seem
to want to cool down.  I replaced the thermostat and noticed another
bit of an improvement.  The car comes up to normal temp more slowly
now, but can still climb beyond that and not seem to want to return.
It has never gone much past the higher bold mark on the gauge, but
it doesn't seem to want to come back down either.  My radiator (as
well as the previous thermostat) is a little over 60k and 5 years old.
Could I need a new radiator this soon?

Ed
Colorado Springs

P.S The water pump is slightly newer than the rad.  My cooling
fan comes on at the appropriate times.  I have put in the more
efficient fan from the 200q20v as well.  It will be timing belt time
soon, so I'd likely do the water pump also.  Do they have that
short of a useful life?

On Fri, 05 Jul 2002 08:57:33 -0400 Chewy4000 at aol.com writes:
> Two days ago the temp whent between the two dots, so I sshut down the
> engine and looks around.
> The 2yr old fuse ling melted big time, I had a spare, and actually
> found it.
> My temp still stays, on these 100+deg days, right before the fist
> dot.
> I have a new rad. new aux pump new hoses all new fluid, what else
> can it be.
> My thermostat is maybe 3 yrs old, could that be the problem.
> On normal days like today 80-90 the temp might be on 12 oclock or
> not much more but on 90+deg days that thing goes up like crazy.
>
> I got to figure out what would help this, any info would help.
> Also wht do you guys think of drilling a hole or 2 on the
> thermolstat.
>
>
> Thnx in advance
> Chewy
> _______________________________________________
> 200q20v mailing list
> 200q20v at audifans.com
> http://www.audifans.com/mailman/listinfo/200q20v
>

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