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Old 09-07-2002, 12:49 PM
Kestas Kestas is offline
I told you so!
 
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,791
Check the coolant level. If the temp sending unit isn't bathed in coolant, it'll shoot up when steam hits it. Same thing with a blown head gasket... if combustion gases hit the sending unit it'll behave erratically. Do you notice any overpressure conditions in the cooling system or bubbling in the radiator?
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