Question about 1996 Chevrolet Blazer

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96 Blazer Overheating

Replaced thermostat; gaskets where replaced; radiator flushed 2x;s; yet it continues to show on the gauge overheating. Heater does not give off heat either.
There are no leaks. Hoses have also been replaced. Any thoughts?

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  • jointheir Oct 30, 2008

    Ok tried that and saw some results. Drove it and got some heat and then at one point do not know what changed but no more heat. Got cool very quickly and then the temp increased just as quick.
    Although I must say was pretty interesting to see what you said work.
    If I remove the thermostat (which we did when we flushed) and run it, all is well never overheats. Put the new thermostat in and it overheats. Something is happening there.. Could the new themostat be bad?


  • veriberi2000 Jan 21, 2009

    I have a 2002 blazer extreme that is doing all the same things and i replace the same part ,drove it home .went out later no heater and gauge went all the way up .whats wrong is the heater core bad or water pump .the heater core makes a bubbling sound when you revved it up.

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Yes the issue is most likely an air block, jack the front of the truck up as far as you can, fill the recovery bottle and run the engine for about 10 min, then shut down and run cold water over the radiator, this should purge the air, recheck the recovery tank and refill as ness.

Posted on Oct 30, 2008

  • yadayada
    yadayada Oct 30, 2008

    Yes there is always the chance the new stat is bad, have seen many new parts that where defective in my 30 years of fixing cars, when I first started got burned by that more than once.

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