Question about 1995 Chevrolet Tahoe
I've replaced several thermostats recently, but my temperature gauge still goes up to over heat and then almost (as if the thermostat is finally opening) goes back to 190 (where it should be). This scenario just keeps repeating over and over. Speed doesn't seem to have an effect, however at Idle it is less frequent. The truck never does overheat and from the engine compatment standpoint, all seems fine. It would appear there is something (module...regulator) not functioning properly.
There is no fan control switch, the engine coolant fan is mechanical not electrical. If you can remove the thermostat and run the engine and you have plenty of coolant the supply hose to the water pump may be collapsing or a small hole may be present allowing the pump to air lock. If the hoses are fine the pump could be bad. Is your heater heating? The answer to this question will lead you to the solution
Posted on Jan 29, 2009
Try it with no thermostat if its still the same only later then try changing the sensor unit.racking my one brain cell here had a problem like this on a seat ,and it was the fan cut in switch its first run it wouldnt cut in then afterwards it was fine all day ,thermostatic coupling switch is the technical term to you me its the switch in the radiator that puts the fan on.
Posted on Nov 13, 2008
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