[V8] Overheating, loss of electric fan 92 V8 4.2

[QSHIPQ at aol.com]

Just a data point.  Before I determined the gauge was bad, I  could turn on 
the heater and get an indication of a reduced temp as well.   Hence my 
misdiagnosis of a bad rad.  Again, ck the temps with an IR  gun.  The best success is 
to zap the head right where the temp sender is  (front of head on drivers 
side, 2 pin connector).  After that test, I would  do a pressure test (for heater 
core leak).
 
Right now, my head temps will rise to 210 (3rd speed fan comes on  normally) 
gauge shows beyond 3/4 hot, and the clue to me was the overtemp  shutdown of 
the A/C never came about.
 
My .02
 
Scott J
 
 
In a message dated 7/17/2007 5:06:04 P.M. Central Daylight Time,  
dag.boesterud at consulgranada.net writes:

I feel  that things are THAT hot. It might be my imagination, but I feel that 
it  shouldn't be that hot from just driving 1,5 miles..

I've added added a  bottle of cooling system flush, and the color of the 
coolant has started  to go from red to grey... maybe there is some clogging 
after  all?

/Dag



----- Original Message ----- 
From:  <cobram at juno.com>
To: <dag.boesterud at consulgranada.net>
Cc:  <V8 at audifans.com>
Sent: Tuesday, July 17, 2007 10:39 PM
Subject:  Re: [V8] Overheating, loss of electric fan 92 V8 4.2


>  <dag.boesterud at consulgranada.net> writes:
>
>> What I  have noticed is that when the temperature gauge starts to move
>> in  to  the 220-230 F-range, if I put the
>> climate control to  "HI", the gauge quite rapidly drops to about 210
>>  F.
>
>> That's another reason to suspect a clogged radiator...  or am I
>> wrong?
>
> You could be right, or not.   What you're doing by turning the heat on HI
> is using the heater core  as an auxiliary radiator.  Doesn't really tell
> you much about why  you may be running hot.  It does help determine that
> the water  pump is OK.


 



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