Constant Overheating

TOYOTA SUPRA
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MFM
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I am the orginal owner of an 87' Toyota Turbo Supra with 118,250 miles. Just this summer I have had problems of it overheating after running on the highway for 1-3 hours, with the A/C working. I have flushed the system twice, replaced the thermostat, replaced the radiator, and the upper engine gasket seal, and the problem still persists, any suggestions? As I said, it only happens on long sustained drives, in and around town I do notice the problem.
Sep 25, 2007 at 12:57 PM
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STRAILER
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Have you checked your clutch fan, if is not functioning properly it will over heat on long trips, next chemical check for exhaust in the cooling system, you might have a cracked cylinder head or engine block. :(
Sep 25, 2007 at 1:06 PM
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BUZZSAW
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[quote:ddf336e0ae="2CarPro Ken"]Have you checked your clutch fan, if is not functioning properly it will over heat on long trips, next chemical check for exhaust in the cooling system, you might have a cracked cylinder head or engine block. :([/quote:ddf336e0ae]

running to fast on the highway in an older toyota is the prob, running faster than 60 for extended periods of time it will over heat and probally blow out the front pump seal of the trans(on automatic modles) try fluctuating your speed, look at guage, if it starts going up reduce your speed to 50-55, I have a truck it does the same thing
Sep 26, 2007 at 8:15 PM
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STRAILER
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Which probably has a blown head gasket or bad fan clutch...lol
Sep 27, 2007 at 3:19 PM