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White smoke from the exhaust is a sign of a blown head gasket. Stop driving the car until you get this repaired. Coolant in the combustion chamber will destroy this engine in short order.

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Q: When i start up my chv350 for like maybe 1 min it smokes white smoke out of the tailpipe i looked and i think the gasket for thermostat is leaking and i have a hairline crack on my manifold what 2 do?
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