1988 Toyota Supra car over heating

Tiny
SPROSTON
  • MEMBER
  • 1988 TOYOTA SUPRA
  • V8
  • 2WD
  • AUTOMATIC
  • 127,987 MILES
I have a supra 1988 and around town the car keeps cool and wont over heat but soon as I hit 3.5 revs it start to over heat I have taking out the temp gage and check if there any air locks but dont seem to be any I have checked if fan work at high revs and it does
Sunday, September 21st, 2008 AT 7:04 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try replacing the thermostat-not it do the following below:

Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following:, Pressure test the Rad. Cap, Clogged
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Sunday, September 21st, 2008 AT 10:04 AM

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