Question about 1995 Toyota Corolla

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After installing a new radiator,the engine is randomly overheating and is blowing antifreeze out of the overflow hose.The temperature guage is not pegging hot and is staying in the middle where it should be. The guy that installed the radiator says the water pump is ok.Any thoughts?

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Sounds like head gasket to me.

Posted on Jul 13, 2009

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engine running too hot.check coolant level, should be 50/50 antifreeze and water.replace thermostat and radiator pressure cap.check antifreeze level in the radiator,coolant level should be just below radiator cap, add coolant to overflow jug,should alway be at the full cold mark.empty coolant overflow jug will allow air be drawed in the coolant system causing overheating.if overheating happens when coming to a long stop.could have faulty engine coolant temperature sensor or bad coolant fan fuse or relay.

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Sounds like there is air trapped in the system. On a COLD engine, remove the radiator cap, and check the level. If it's low, slowly add coolant until the rad is filled right to the top, then cap it. Top up coolant overflow bottle if required. Start the engine. As the engine reaches operating temperature, the coolant level in the overflow bottle should rise. If it doesn't, it means that all the air is not yet 'burped' out of the system. Provided that the radiator cap is good, and that the coolant level is maintained at the proper level, the system should eventually expel all the air. Hope this helps. Good luck.

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The thermometer lights came on what does that mean? what does it mean when anti freeze is overflowing randomly after sitting for two hours?


If it's overflowing.... I doubt it was just sitting for two hours. Overflowing is because of overheating or a blockage, which only affect the car when it's running. It is not overflowing, but simply leaking, then you have a leak. Pressure test the system, replace what's leaking, and, depending on the coolant condition, top up or flush it.

I suspect this vehicle has been overheated, because you asked about the lights for engine/coolant temperature, and because you said "overflowing". If this is the case, do the same thing as if it were a leak, but have a technician check the cylinder head for fractures and warping as well.

Next time pay attention to the temperature gauge and don't wait for the "idiot light" to come on on the dash. A slightly high gauge is a problem, but an engine/coolant temperature light is usually an expensive problem.

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