my 1986 toyota supra does not over at idle,but once i drive it will overheat,but sometimes the temp will drop right down?,then back up?,,,it also spits water out of the overflow,at any time?
Has the thermostat been changed? If not i would change it an the water pump
ya,i changed the thermostat,was thinking about the waterpump or the headgasket?
I have a supra and had the same problem. This variable temp problem is likely a head gasket... Do you hear a water/fluid flushing sound as you accelerate??? if so, this may be further evidence of a head gasket problem. Mine was fine for short trips, but on longer trips, the overflow tank would overfill... Head gasket fixed it. Hope this helps.
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