I have a friend who has an '87 Weekender that has a coolant problem. He is currently seeing dramatic level changes in his overflow tank. Coolant filling back into the tank (other than normal hot/cold expansion/contraction) to me indicates a leaking head gasket where some combustion gasses are forcing into the coolant system and displacing the antifreeze. This would eventually overpressure the expansion tank and push coolant into the overflow tank. Does this sound correct? Are there any other possible explanations? He has already put in a new radiator and the pressure cap was replaced. I think he has observed some over-heating on longer trips and when he stops and checks the level, it is overfull. Jay |
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