Re: Cooling fan problems (again)

[kdbinney@juno.com (Kyle D Binney)]

This latest reply got me thinking, It does make sense even though I have
never experienced anything like it.  When my pressure cap went bad it was
always releasing some pressure and would let off coolant in vapor form. 
It took forever to find that leak.  As for the thermostat, It would be a
good idea to replace it after overheating a couple times anyway, when my
car gets really hot either from hard, hard driving or something else the
thermostat seems to always go in a week or two, I figure it gets over
extended or something.  

If your car runs at a good temp. when on the highway or moving good
however the thermostat probably has nothing to do with it, the fan
shouldnt ever come on in these conditions so if you still have an
overheating problem then you could dismiss the fan, and its system.

Kyle

On Fri, 16 May 1997 20:19:54 EDT mousetrap@juno.com writes:
>
>On Fri, 16 May 1997 14:15:41 -0700 Tim Ebling <tim@surrealsoft.com> 
>writes:
>>
>>Well after I replaced my cooling fan thermoswitch, I thought my
>>fan problems were solved.  After going for a quick highway test
>>drive and returning, I left the car idling until the temp needle 
>swung
>>to the 3/4 position, at which point the fan came on.  Woohoo,
>>problem solved.  Or so I thought...
>>
>>Over the last week my car has overheated 3 times, and every time I
>>checked the fan and it's not running.  I'm going to clean the 
>contacts
>>to the thermoswitch this weekend but I'm wondering if there are other
>>possible culprits.  If my thermostat was failing would it also cause
>>the fan not to come on?
>>
>>Thanks
>>
>>Tim
>>
>>'88 16v Tornado Red
>
>Classic thermostat symptoms in my opinion.  2nd guess in a bad 
>pressure cap.
>If the thermostat is "sticky" and does not open properly, then the hot 
>coolant won't circulate to the fan switch.  If pressure cap is bad, 
>then the boiling point drops and will allow steam pockets to develop 
>in the head.  
>
>If it overheats sometimes, but is fine other times, is almost 
>guaranteed to be the thermostat.  Replace the 'stat O-ring at the same 
>time for good measure.
>
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