Question about 2003 Chevrolet Impala

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Have oil in radiator and it does not change gears untill 40 mph. Drang and machine flush radiator and the temperature rose to 1 o'clock. Before I flush the car ran good and I do have tro add oil. What is my problem

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You have a very expensive problem on your hands--the common core radiator for the cooling system and the oil cooler for the transmission has leaked one into the other. The fix is to replace the radiator or to block off the connections to the transmission lines and install an auxiliary oil-cooler attached to the radiator core thus saving the original radiator. Unfortunately, the transmission has very likely drawn in coolant into itself which needs to be completely cleaned out, the internals of the transmission inspected--particularly, the bearings and any other close fitting components. Farming this job out will likely cost over $3000! It might be cheaper to replace the transmission with one from a wrecking yard. Hope this helps!

Posted on Nov 09, 2010

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If after the radiator is flushed and you still overheat, the next posibility is the head gasket. But don,t worry yet, follow these steps and observations. (this goes for 93 camry V6 also, I have one)

  1. change radiator cap and pressure cap where applicable
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  4. flush the radiator and engine block
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The temperature guage can tell you what you need to know.
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  3. If the car overheats at anytime, anywhere and it drinks coolant like a fish, then you my friend have a headgasket problem. Change waterpump and head together

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