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Flushing the radiator may help with the cooling problem but not necessarily make the engine run smoother. If it is a 6 cyliner engine check for a possible leaking lower intake manifold gasket. If the LIM gasket is bad, it may be leaking coolant into the oil and possibly into the cylinders. Also it may leak externally or it may leak internally. Go to http://www.gaoc.com for more info on this problem. If this is the case, it is a serious problem and you shouldn't drive the car until you get it fixed. I have owned these cars in one form or another since 1994 and the radiator leaves a lot to be desired. The radiator seems to clog very easily. So it requires a lot more maintenance that GM likes to admit. I have never had a problem with the thermostats and only had one water pump failure. I also have never had a problem with the fan but, like others have said, they should be checked as well GOOD LUCK!! Sometimes having the radiator flushed will help; however, it may be your themostat is sticking causing the motor to run hot. If this is the case, you should get a new themostat installed. Also check that the fan is running with the engine hot and in idle. The fans wear out may need replacement. It may also be the fan control circuit. I had that problem! Make sure your radiator cap is not missing the seal! Without the seal pressure is not kept in which will cause the engine to overheat! Simple problem, cheap fix!

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โˆ™ 2006-07-20 04:31:34
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Q: Will having the radiator flushed make the engine run smoother and stop overheating on a 97 Pontiac Grand AM?
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