[Vwdiesel] thermostats.

[LBaird119 at aol.com]

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  Cheap ones will stick shut or open because the slidey thingy for the pin,
is just a cripm in the carrier piece of metal whereas the Walther, etc. is
usually a bushing.  Those can get out of line and stick.  The good ones,
I'd expect just something getting stuck or wedged in there.  Leaking is
another thing.  I had one doing that but otherwise I've replaced them at
overhauls and none since yet. :)
     Loren