Question about 2001 Chevrolet Blazer

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2001 Chevy Blazer V6 running hot

The thermostat temp will go up almost to red line, the check gage will come on, and then the temp suddenly drops back to about 220 and it will continue at that temp the rest of the time.

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COULD BE T STAT STICKING OR BAD TEMP SENSOR FOR GUAGE

Posted on Jul 29, 2009

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1998 chevy venture running hot change the water pump and the thermostat, the fan is working, the temp gage goes up in the cool area then drops down to the hot area, what can the problem be?


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2 Answers

Temperature gauge red lined then dropped back down


more than likely but if the temp gets to high you run an extremely high risk of blowing a head gasket or warping or cracking the head.So have it changed out before driving the car much more and also have the water pump checked.

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Could be a combination of things. First replace the thermostat with a new one. Then backflush the system, that should fix ya right up. Hope this helps, Thanks;
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