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Originally Posted by curtis73
Big no-no. white smoke is coolant burning. Blown head gasket is a best-case diagnosis, cracked head or block is worst-case.
Skip it, or pay accordingly.
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white smoke MAY be coolant. White smoke can also be raw fuel, oil, or water vapor.
The only way to know for sure with ANY exhaust smoke, no matter the color, is to smell it. Have a friend follow you with their window down.
Simply: if it smells like oil, its oil. If it smells like gas, its gas, if it smells like coolant its coolant. Etc
I know that there is a well-established belief that color = content, but I'm trying to make an important point: its false. Completely false. ESPECIALLY when its white. White smoke could be any one of the 4 substances. Do not assume