Another potential prolem with some aftermarket cast thermostat housings is
that they are not flat on the bottom and thus leak. Sanding them down on a
sheet of emery on a flat piece of glass or granite works wonders
Bill Rogers
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> From: CoolVT@aol.com
> To: tigers@autox.team.net
> Subject: Thermosthat
> Date: Wednesday, August 26, 1998 9:30 PM
>
> Since the subject came up recently on the list regarding changing a
> thermosthat I thought I'd pass on a recent experience. It was on a Jeep,
but
> could happen to any car.
>
> When tightening the bolts on the gooseneck I heard a little snap. I
took it
> apart and found it had cracked on one of the ears. It's made of white
> metal.
>
> Purchased a replacement at the dealership ($24 bucks worth). After
> installing, it leaked. I figured the gasked was torn or I hadn't cleaned
the
> surface well enough. Pulled it apart and found cracked ear again. Back
to
> the dealer and they claimed the crack was caused by overtightening.
>
> Purchased another at "Parts America". This one is only about $8.00 and
it's
> cast iron.
>
> I figured before I screwed something else up I'd better figure out what
caused
> the first two to crack. In test fitting the new thermosthat to one of
the
> cracked pieces I discovered that the metal crown on the thermosthat was
just a
> hair too tall to fit into the housing and seat cleanly. Therefore,
> attempting to tighten resulted in a cracked part. The new cast iron
part has
> all kinds of room inside and there is no problem at all.
>
> Just brought this up as a precaution for the list. I had never heard of
it
> before.
>
> And, by the way, the gasket at the dealer was $1.50, at another national
> supplier 99 cents. and at an independant supplier 48 cents.
>
> Mark L.
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