ZZ4 Overheating ???
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Joined: Apr 2001
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From: San Jose, Ca.
ZZ4 Overheating ???
Was wondering why my engine is over heating all of a sudden (goes to red zone on heat gauge). The fan belts are good and the fan seems to be working. Fluid is level is OK. How can i tell if the water pump is working properly? What else could be causing this. If I turn the interior heater on the temp gauge goes down to normal operating temp. Could it be the thermostat?
Help welcome.
Peter
Help welcome.
Peter
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Joined: Jun 1999
Posts: 7,117
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From: Dove Mountain Arizona
Re: ZZ4 Overheating ??? (74Vetteski)
Very possibly it is the thermostat. They have a nasty habit of sticking either open, closed or somewhere in between. It's an easy change out so that's what I'd do that first. And get a good one! A hi-flow with the bleed hole in it is best. To check yours you can boil it in water and using a candy thermometer you can tell at what temp it opens (if at all), and it should open fully.
