84 4ksq Radiator Fan Question...How High?

[Huw Powell]

>>>FWIW, there is no purge valve on a 4KQ.
>>
>>There sometimes is.  At least on some aftermarket radiators, 
>>there is a little vent bolt thing in the top of the radiator 
>>that allows purging of air.
> 
> 
> Really?

Yes.

> I've had two 4kq's and both have had a nice little brass purge bolt
> on top of the radiator - the first one was back in the day and it was
> definitely that way from the factory.  The one I have now also has a purge
> bolt but the radiator is almost certainly not the original, being 20 years
> old and all...

See?  The reason I said "sometimes" is that it would seem the person who 
posted the "no purge valve" comment has one without one; also, I have 
seen cgt radiators, which are the same, without them.

> Speaking of cooling systems, where is the best place to find a quality
> thermostat?  Mine is stuck open and I'd rather not have to go back in 9
> months from now.  It seems people aren't too happy with the dealer part.

I didn't know there were crappy ones... I just get mine from Atalantic 
Imported, probably some OEM brand for $10 or so.

There may be other factors in thermostat failure, like sludge goop in 
the cooling system gumming them up.

While flushing and replacing the coolant (and thermostat, etc.) can be a 
leisurely summer afternoon project, it is this time of year (northern 
hemisphere bias showing...) that we discover they need replacing, which 
takes all the fun out of it.

It's also battery (and alternator/starter) season.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/