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Possibly coolant in the exhaust from a blown head gasket. Fix ASAP. Do not drive until the is fixed. Severe engine damage will occur. Yep. White smoke = heat problems. Blue smoke = oil problems. Heat damage more urgent attention. my carb. went bad and it kept blowing head gaskets,white smoke,the head was good but the bad carb made my piston rings go bad and i was getting oil on the first intake and first exhaust plugs closest to the radiater, i got new engine

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14y ago
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Q: What would cause white smoke from a 1986 Nissan pickup exhaust?
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