Question about 1999 Chevrolet Malibu

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Just bought a 99 malibu with 76,000 miles for $1000. I was told the only problem was the heater core needed to be replaced, and that as a result fluid was leaking, causing the engine to overheat. I was told that parts and labor would cost around $500, I drove about 20 miles, and it started really over-heating, to the point that it would not start unless it cooled off, but this was obviously going to be over and over again. We added water on the side of the road, but it was obvious that we would need to have it towed. I hope that I still have a good deal, as I am fully willing to replace the heater core. My husband put a computer on the engine which is supposed to show any probelms, and none seem to be present. Does this sound like fixing the heater core will alleviate the problem? (The ac blows hot also; maybe it just needs freon?) Thanks, Carol

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I have the same exact car and had the same exact problem when i bought mine. I would check to see if it is a head gasket becuase that is the problem that i had with mine, but with that i also replaced the water pump and the thermostat and things have been okay so far so i would check into that.

Posted on Aug 22, 2010

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Before you spend any money on fixing the heater core or the car, block off the lines for the heater and try running the car. I'm very suspicious that you will need to do more than fix the heater.
To block off the heater, you will see 2 hoses going into the firewall from the engine. Unhook them from the firewall and either plug them with a large bolt and clamp or use a plastic elbow from the hardware store to join them together and bypass the heater.
If it still overheats then you should prbably take it to a shop and have it looked at but I'm guessing you will probably have to do some serious engine work. Hope this helps.

Posted on Aug 08, 2010


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