Knowing the different types of smoke can be helpful to get to the root of the problem and prevent major damage to your car.

 

White/Grey Smoke

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It is important to note that thin white vapour and white smoke are two different signs. While the vapour is a normal occurrence usually due to the condensation build-up from a cold engine, it should go away when the engine has warmed up. White smoke however is a more serious sign, indicating engine problems that need to be attended to immediately!

White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:

Coolant leaks in this respect could result in overheating and major engine damage.

 

Blue/Grey Smoke

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Blue smoke is an indication that oil is being burned in the engine’s combustion chamber due to clogged oil passages or something more serious.

These are possible symptoms and causes:

This could also affect the spark plugs, causing rough idling, resulting in reduced fuel mileage and stunted acceleration.

VAG PRO-TIP: Blue smoke during acceleration means your vehicle’s piston rings may be damaged. During deceleration blue smoke means the cylinder heads’ valve guides are damaged.

 

Black Smoke

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Dark or black smoke usually means the engine is burning too much fuel. A clogged and dirty filter could be the reason. If the filter is clean, these could be possible causes:

 

If your exhaust is sending up smoke signals, play it safe and visit the professionals. Find your nearest VAG Spec Centre and bring your vehicle in for an inspection today!

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