Question about 2003 Honda Civic

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I have a 2005 Honda Civic coupe, i only have heat when accelerating and the car is running hot, I have replaced the thermostat, the car is still running hot, I had a test done on head gasket and the air bled out of the line at brakes plus the said the head gasket was fine, I don't see where the coolant is leaking but I can add coolant and the car doesn't run hot unless I drive take a long drive, when it runs hot I add coolant and it drives fine for several days unless I take at least a 100 mile drive. The fans are also working so it is not the fans. any ideals on what this could be?

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There are only three places for coolant to leak.external leak to the outside of the motor,internal leak like a head gasket causing the motor to burn coolant(white smoke out the tailpipe),internal leak(coolant leak into the motor oil.)you say that the head gasket was tested and it was okay then this takes care of burning coolant,however it could be leaking into the motor oil.check the oil level and condition.I would think the tech would have checked this,but check it just in case.if the oil level is good and not thick or white or milky looking then this is not the problem.you could have a leak externally like a hose leaking a frost plug leaking,water pump leaking,this should be checked out by having the cooling system pressure tested a carefully inspected for leaks

Posted on Mar 15, 2011

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