Question about 1989 Chevrolet Corsica

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I have a 1989 Corsica 2.8 LT. It running fine but it is over heating. The water fills up the overflow and it look like it is boiling in there, I changfed the thermostat and refilled with coolant but it continues to overheat.

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Is the cooling fan coming on? if not, there is a temp sensor on the cylinder head that tells the computer it is time to turn the fan on. if the fan is coming on you may have a plugged radiator or a bad head gasket.

Posted on Sep 09, 2010

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If I understand correctly, your coolant (water) is overflowing out of your resevoir? Either you have too much coolant, and it doesn't have any place to go, or it is boiling over. Remeber even water expands when hot.

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2 blocks is fast to reach boiling.Take the cap off the overflow tank and fill it right to the very top with coolant.Start the car and watch for a steady stream of bubbles.If you see a steady stream you do need a head gasket or have a crack somewhere in a combustion camber.

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Hi, My car is boiling water and it goes our from the overflow pipe at the coolant level water tank. I let my car run for one hour standing on my driveway and the temperature was going to 222 and then the...


When sitting still, yes both fans on a car equipped with two fans will run. The temperature ranges you posted seem within acceptable range. That said, the water (coolant) should not boil at those high temperatures, but some overflow is expected/normal. Ensure that you are not adding pure water to the radiator and instead are premixing it with antifreeze coolant or adding premixed 50/50 that you can buy at auto stores as this will keep the water from boiling and freezing.

As an added point of information, the hose leading into the overflow jug is two-way, meaning that when the coolant in the radiator cools down enough, it creates a vacuum and pulls coolant back into the radiator.

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Might be the heater matrix for the car heating system that is leaking in which case your carpets will be wet underneath

If the matrix is ok then I would hazard a guess that the block has cracked and gases are being forced into the cooling jacket around the block.

Fill the radiator leave the cap off, run the car stationary , watch the water , if there are lots of bubbles coming up from the radiator your head , block or gasket needs attention

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