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Constant Overheating

Tiny
MFM
  • MEMBER
  • TOYOTA SUPRA
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.
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Tuesday, September 25th, 2007 AT 12:57 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
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. :(
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Tuesday, September 25th, 2007 AT 1:06 PM
Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
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
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Wednesday, September 26th, 2007 AT 8:15 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Which probably has a blown head gasket or bad fan clutch. Lol
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Thursday, September 27th, 2007 AT 3:19 PM

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