My 1990 runner blows alot white smoke when it gets hot. i just had my heads re-done. so i haven't blown a gasket. could it be my radiator or my hoses or what?
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1990 Toyota 4Runner
Question: Over Heating
Answer #1patrick mannion from Greg Solow's Engine Room, September 11, 2009, 17:05Master
Often a serious overheating problem will damage the oil control rings causing it to allow oil into the combustion cylinders. This will be blue grey colored smoke out the exhaust pipe. Toyotas are great but the 1990 4Runner did have head gasket problems. Were the cylinder heads pressure tested for cracks when the heads were off. I'll send you an article I wrote on cooling systems maybe it would help answer some questions.