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Alan Tatom Posted on Jan 21, 2016
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White smoke just started coming out the exhaust. It smells like gas, not coolant. What could it be?

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Glenn Smart

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  • Toyota Master 845 Answers
  • Posted on Jan 21, 2016
Glenn Smart
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Has the vehicle been overheating or losing coolant? The symptoms you describe could point towards head gasket trouble (and other faults). Often, the exhaust fumes from a car with a failing head gasket will smell 'pungent' and 'sharp'.

Check the oil on your dipstick. If there's a greyish/cream sludge - sometimes referred to as 'mayonnaise' - this points towards coolant entering the oil system via a leaking head/head gasket.

Also check your coolant - is there any evidence of engine oil in it? Although the mayonnaise on the dipstick is usually the tell-tale sign of gasket problems.

If you suspect the head/head gasket try a special sealant such as:




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