How To Fix Blue Smoke From Exhaust?

Why does blue smoke come out of my exhaust?

The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise.

Is blue smoke from exhaust bad?

If the positive crankcase ventilation valve gets stuck, the oil, air, and gas will continue to mix inside the engine. This is very bad and will cause blue smoke to come out of the exhaust. Worn Engine: Another common cause of blue smoke is a worn engine. Every engine has pistons that move up and down the cylinder.

What causes blue smoke on acceleration?

Blue Smoke From Exhaust When Accelerating

When blue smoke is emitted from a car’s exhaust pipe, this usually indicates that a leak in the engine’s valve seals is allowing oil to leak into the combustion chamber where it is being burned along with the fuel. This may be due to natural deterioration or a faulty part.

How do you fix a blue smoke from a diesel engine?

Constant blue smoke on a turbocharged diesel is unlikely to be caused by worn valve stem seals. Instead, the problem is more likely to be: Leaking turbocharger seals, which are allowing oil into the intake and/or exhaust system. Excess engine oil in the sump, which is getting splashed up into the bores.