Question about Honda Accord

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Car still over heats.I've changed or checked every possible thing

1992 Honda Accord LX 2.2L still over heats.I've changed the water pump,thermostat,flushed the radiator,and checked the sensors.But still over heats after a while. When it does I turn heater on and it seems to help bring the temperature down,but it only solves the problem temporarily.What happens if I get stuck in traffic.I don't think turning on the heater will solve that.It will over heat and probably blow my head gasket again.I've driven it also for 2 days without any incident until I turn on the a/c then it would start over heating.

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You may have a head gasket issue.Check to see if the cooling fluid is milky( cold engine).There is a test that can be done to verify head gasket issues.There are also sealers that work.Another issue is air trapped in the system.If the service station properly pressurized your cooling system it sould not be an issue,if you made the repairs make sure you got all the air out of the system.Good Luck.

Posted on Sep 07, 2009

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The radiator is most likely the problem. I would take the car to a radiator shop and get and opinion. If the core is blocked flushing sometimes doesn't do a lot and it needs to be replaced. Dont risk it overheating or it could prove costly. I assume the fan is running and the fanbelt is fine. Best of luck with this.

Posted on Sep 07, 2009

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Turning AC causing Overheat again indicates that the cooling is not sufficiently flowing through the engine to carry the heat. 1- Flushing the radiator is not bringing it back as original. If it has not been replaced since 1992, then it is time for change. 2- Before changing the radiator you can test it by remove the thermostat , run as it for a few days. Turn on AC to see if still a problem. 3- At the beginning of the engine starts, squeeze the upper hose to see the water flowing inside. a- If it is flowing then your water pump is good. b- If it is not flowing then your water pump is not working. c- If it is flowing but weak then you have a clog up in your radiator. Don't even rebuild it, get a new one.

Posted on Sep 07, 2009

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Problem with flushing the radiator is that the chems used generally can't dissolve any real established blockage...instead the flush goes around it instead of through it. Flushing is a good idea every couple of years as prevention but usually will not cure an overheating problem. Your radiator is old, and likely it is partially blocked. Especially with a small radiator, likely your heater is at least one fifth the size of the radiator and therefore turning it on will mitigate the effects of the blockage, but is really uncomfortable to use as an alternate radiator. Therefore, change your radiator and your problem should be gone!!

Posted on Sep 07, 2009

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You'd better have another pressure check done on your engine; because I hate to say these 2 words: head gasket.

Posted on Sep 07, 2009

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