Question about 2001 Isuzu Trooper

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Why is it overheating I replaced everything, I mean everything

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One thing that you probably didn't replace is the viscous fan hub
It spins the fan until you need a heavy air flow then it just spins
However if you have then the other thing that causes diesels to overheat is excess fuel
have an accredited diesel shop check the pump and if it is a turbo also have the turbo checked out
have a compression test done to check for head gasket problems.

Posted on Apr 09, 2015

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If heating up fast? You may have air trapped in the heads/head. Just a shot glass of air trapped will cause coolant to steam, boil and expand. Thus you will over heat. Placing truck uphill on ramps "bleeder screw" open. Also you can get airvac this puts cooling system under vacuum pulling air out. Faulty thermostat. Faulty coolant temp sensor "if elec. Fans" Blown/ leaking head gasket.

Posted on May 19, 2015

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Do your car have bleeder valves? I'm not sure about your car, but some cars need to be bled. If you are certain that is not the thermostat, the pump, or the fan, them it could have an air pocket in the pump, therefore the water is not circulating.

Posted on Apr 10, 2015

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