Question about 1993 Acura Legend

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93 acura continues to run hot, the bottom hose isnt getting hot. i have changed the thermostat.

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This is caused by a leaking cylinder head gasket or air in the sytem, if u did not bleed the cooling system follow this procedure, it is generic for all cars.
The generic method of bleeding air from the cooling system is to use a floor jack and raise the front of the car as high as poss, then fill the coolant recovery tank full and run the engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be pulled from the recovery tank, repeat as necessary, never let the recovery tank run dry or more air will be pulled into the cooling systeml , if it still overheats then you need to have the head gaskets checked with a gas analyzer for hydrocarbons present in the radiator or recovery tank

Posted on Dec 10, 2009

  • dcleyerle
    dcleyerle Dec 03, 2012

    Dennis, I have the same problem on my 94 GSR motor. I do have one corner of the head gasket that seeps oil. Can this be the cause. I changed the thermostat and fan sensor. But I still run hot.



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If the upper hose is hot and the lower hose is cold than there is a flow issue. I'm guessing you replaced the thermostat to try and resolve this issue and you bled all the air out of the cooling system? If this is tru than I would suspect the water pump is bad. Possibly the impeller has come off from the shaft? The water pump is timing belt driven.

I’m happy to assist further over the phone at

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If you changed the thermostat yourself and have noted that the lower radiator hose is cooler than the upper radiator hose, you may have installed the thermostat incorrectly or have purchased a faulty thermostat. A lower radiator hose that does not get hot (or as hot as the upper radiator hose) is a direct indication of a faulty thermostat. Please vote for this solution if you found this to be helpful. Thanks,

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Run your car with out thermostat. To see if may be your new thermostat is bad as well.

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if that doesn't fix it, check the water pump

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