This thermostat drilling thing had me scratching my head for minute,
too.
When I picked up some other parts at my Ford dealer, I suggested to my
parts guy that I would pick up the thermostat somewhere else, to avoid
paying for that expensive Ford box. He said it was worth buying the
Ford
one, because it has a built in check valve. It looks like a slightly
high tech drill hole. The thermostat is to be istalled with this
rotated
to the top. Anyway, he said it was important because it allows air to
escape. Could this have something to do with this solution?
Food for your thoughts,
Mark
STUART_BRENNAN@HP-Andover-om3.om.hp.com wrote:
>
>
> Something's a bit off in this explanation.
>
> The guy's pump is running slower, so he gets higher temperatures. Makes sense
> so far. But drilling holes in the thermostat cures the problem, by allowing
> some flow when it's closed? Wrong explanation. If he's too hot, the thing
> should be wide open, and the additional holes serve to decrease the
>restriction
> at the thermostat, increasing the flow. Without knowing how many holes, and
>how
> big the stock opening is, it's hard to say how much of a difference it makes,
> but it must make some. And the car will take longer to warm up.
>
> Remember the discussions of a few weeks back. This result adds to the
>evidence
> against those folks who want to slow the flow to improve the cooling.
>
> Stu
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