Thread: Cooling fan issues. Need help solving problem.

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  1. #1 Cooling fan issues. Need help solving problem. 
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    Recently my 90 degree coolant hoses that run into the lower manifold busted, and caused my car to overheat. I replaced the hoses, and added coolant. Now since this happened my cooling fans wont turn on to cool my engine. I replaced my temperature sensor this morning, and nothing has changed. My next move is to replace the relay. Both fans turn on when I run my a/c but wont turn on to cool the engine. Car temp is fine on highway but rises when driving around the city. Any suggestions? Thanks, Im new to this forum. Marc.
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  2. #2 Re: Cooling fan issues. Need help solving problem. 
    Killa Bee Scottydoggs's Avatar
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    did you bleed the air out of the system when you re filled it with coolant?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: Cooling fan issues. Need help solving problem. 
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    Quote Originally Posted by scottydoggs View Post
    did you bleed the air out of the system when you re filled it with coolant?
    Yes I did. I "Burped" the radiator.
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  4. #4 Re: Cooling fan issues. Need help solving problem. 
    Killa Bee Scottydoggs's Avatar
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    not the rad, the bleeder valve a top the t stat housing.

    leave the rad cap off, let the car car warm up, wait for the t stat to open, the fans usually come on after the t stat opens.(212 ish) then bleed the valve. open it up a few turns till a steady stream of coolant comes out. shut the screw, top off and cap it.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: Cooling fan issues. Need help solving problem. 
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    could air in the coolant system really prevent the fans from turning on?
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