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1984 245 overheating problems 200

posted by  thomas_covenant on  Sat Jul 9 16:30 CST 2005
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Klaus has the key. You need to know what the real temp is. Bob is also on the ball, pointing out that the normal temp is 9:00. Your low temp could indicate a stuck open thermostat. When 'stats start to stick open, they also can stick closed. It's entirely possible that yours is sticking closed until the temp spikes up and then it opens again. A new thermostat is certainly in order here as a starter. While you're doing it, flush the rad and use new coolant.
The fan clutch is tested by letting the car sit overnight, then moving the fan by hand. It should spin freely with only slight resistance. Then drive the car until it's good and warm, then stop the engine. Again move the fan by hand. It should be very difficult to move. If it's not then the clutch is bad.
Thomas





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