Question about 2000 Oldsmobile Intrigue

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My 2000 old 3.5 l intrigue overheats at 1500 rpms and below. I have changed throttle body gasket, thermostat and water pump and it still is overheating. Where do I go next.

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The orange antifreeze that is used is know to gel up and after a few years when the mixture is no longer 50/50, the antifreeze will crystallize and plug up water journals and jackets. The orange antifreeze has a life of 5 years or 150,000 miles and any longer will have the cooling system plugged up with crystals. Best thing to do is to flush out the cooling system with Preston coolant flush, use the dry powder to flush the system out and follow the instructions, then replace the coolant with 50/50 (water/antifreeze) mix. If your not sure how to mix, you can buy them premixed. This should help keep your cooling system 100%, keep me posted. Be glad to help get your car running 100% and you could also replace the temperature sensor, it's located at the manifold just in front of the thermostat housing. The tip of the sensor may have crystal formation, giving it a false reading. 

Posted on Jul 16, 2009

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Have you tryed the radiator

Posted on Jul 16, 2009

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