:angry: My suzuki Vitara has developed an overheating problem. I've replaced cap, thermostat, waterpump, fan clutch. It runs cool for a few miles, then starts overheating when under duress. (going up hill, etc.) I can turn the heater on, and can watch the temp gauge go down rapidly. Also, when coasting, I can put it in neutral, rev the engine, and the engine cools rapidly. Having the ac on magnifies the problem. I had the car in the shop, and their testing showed no loss in compression in the cylinders, and no pressure leaking into the radiator. The mechanic doesn't believe it's the head or head gasket. (It also seems to lose power right before it starts heating up.) Any help would be appreciated
The mechanic who looked at the problem tested with a pressure tester, and thought the headgasket was ok. He replaced the water pump, but the problem still occurs. Brings up another question. When I replaced the engine temp sensor, I had to remove a bolt just beside the sensor that didn't seem to have any function, but coolent was evident in bolt hole. Is this a bleeder for air in the jackets? Is there a special proceedure for removing air bubbles? (I have seen that for some makes, you remove a bleeder bolt, and in some cases, have to jack up the vehicle to get the air out.)
Turn the engine on... after a while open the bleeder and let the air out... not too much
just a little so the air gets out, then close it wait a few seconds and repeat the procedure until your happy... wich engine is it?
Took it to the dealership, they found (using uv die) small holes in the radiator. They replaced the radiator, and the initial problem was fixed. However, the hood was getting so hot, that you couldn't touch it. (Temp gage was reading normal.) Back to the dealership it went, and they found both catalytic converters were blocked. Luckily, they were covered under the emissions warranty. Thanks for the replies,
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