Re: Water pump/thermostat question

[Paul Krucke <vwfan53@yahoo.com>]

---Jim Buck <vwpride@mixi.net> wrote:
>
> I read somewhere that drilling a pilot hole in the flange of the
> thermostat will help eliminate air in the cooling system, and assure
> constant flow to all components.  My question is, can I drill a small
> hole in both the upper AND lower flange without impairing function? 
> Also, I discovered that the ball fitting that holds the thermostat in
> the water pump has warped (plastic fitting) and caused leakage.  

In theory drilling both the upper and lower should not impair its
function, but with the effects of the impeller there is some
uncertainty in my mind.  I will say this however.  In over 20 VW H20
antifreeze/thermostat changes I only had the 'air bubble' instance ONE
time when I agreed and let my local VW shop do it for me...????  Maybe
I am lucky, as I really have no magic technique when filling it.

You should be able to replace the ball fitting/thermostat carrier with
an aluminum one from an early model VW.


==
-Paul
http://home1.gte.net/vwfan
90 Audi 90 Quattro 20v
87 Scirocco 16v
87 Jetta GLi
63 Bug Sunroof

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