Why don't you explain what was wrong with your vehicle that was causing
the high reading? If you can't exactly answer that, then you don't know
what problem is still  lurking to haunt you anytime, anywhere. You don't
know and can't evaluate how serious it may really be. That is the
biggest danger. You will think things are ok, take a longer trip, have a
problem and feel forced to try to limp home or to a safer spot, damaging
the engine in the process. Just running the engine too cold will damage
it as well, by accelerated wear, but probably so slowly that you can't
quantify it.

Mark

JordanVw@AOL.COM wrote:

>my van was never overheating.,..it was just running way hotter than normal.
>new rad, new gauge in dash.   still ran 3/4 at normal op temp.
>now it runs about, or alittle cooler than my other 1.9L.    i still fail to
>see why everyone thinks i am going to destroy my engine from running a t-stat
>that is 17 degrees cooler than the original one..
>
>chris
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>>The real question is; did the new T-stat cure the overheating? Find a long
>>steep hill and test it. It did not on our 85. That turned out to be a water
>>pump AND a radiator.I went back to the 87 degree unit afterwards.
>>Ken Lewis
>>http://neksiwel.20m.com/
>>
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