Re: '85 GT cooling probs

[rwcohn@chinet.chinet.com (Robert W. Cohn)]

> 
> In a reply to my earlier question, Zafer Mehmood says:
> >Considering that you have problems with the temp fluctuating, here are some
> >obvious items to rule out (you may done this already):
>                                                                                                                               
> >- You mentioned adding fresh coolant recently. Is the coolant concentration
> >still within spec? High conc of coolant reduces its heat dissipation 
> >properties.
> 
> I'm almost sure that the coolant is within spec.  When I said I added fresh 
> coolant recently, I actually meant that I added fresh mix (50/50 ratio).
> 
> The only problem I can think of is some sort of blockage, but then I would 
> think that it would just run very hot continuously, not fluctuate the way it
> does.
> Could a dying water pump cause problems?  I've started to lose quite a bit
> of coolant within the past 3 weeks, and I cannot find a leak in any hoses or
> other obvious connections.  Also, the engine recently has begun making a
> high-pitched whining noise, and I haven't had time to look into that.
> 

Concider this: 

	A leaking head gasket will often allow combustion gasses into the
coolant passages.  Not only does this create an air bubble within the head,
but the head (yes), will tend to get a little warm as a result.  If the 
pressure gets high enough, the cooling system will purge air and coolant.

Sorry about the grimm thought.

robert.....
rwcohn@chinet.com
> 
> 
>