Posted on Aug 14, 2011

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My car is overheating when I drive? - 1993 Oldsmobile Ninety Eight

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Anonymous

Master 2,006 Answers
Posted on Aug 14, 2011

Anonymous

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Joined: May 17, 2011

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A car can overheat for several reasons, so it is going to take some thinking to figure it out.

First, think of when it is overheating! Is it very quickly or only after driving in city traffic with your AC on? If it is right away, then check your thermostat and make sure that it is opening when it should. If this is a continuous problem you might want to install a thermostat with a lower temperature rating than what the book calls for. And then install the right one for cold weather. The next thing you need to check is the water pump. If that isn't pumping water through your system then you will need to change it out. If that isn't it, then you will need to check to make sure that you don't have a blown head gasket or cracked block. To do that check your oil dipstick and look closely for any sign of coolant on it. Also check the coolant for signs of an oil residue. Some auto parts stores sell a tester that checks for combustibles in the coolant system.

Now if it only overheats in city traffic with the AC on, you need to check for partial blockage in the radiator. If you have a thermometer, you can slowly go across the radiator fins and look for differences in temperatures. That would indicate a blockage, and you could try a radiator flush to clear it, but you might have to replace the radiator if it is too bad.

Another thing to check is you cooling fan and make sure that it is working. Hint it should come on as soon as you turn on you AC.

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