Billowing blue smoke from a automotive sometimes signifies oil burning within the combustion chamber. Unlike white smoke, which is commonly associated to coolant, blue smoke alerts a difficulty with engine oil.

Engine oil is essential for cooling and lubricating the engine. But in a system as intricate and sophisticated as a combustion engine, factor within the incorrect place can result in unhealthy penalties — or fairly, an excessive amount of of factor (even in the proper place) might be unhealthy.

It’s regular for a small quantity of engine oil to be within the combustion chamber. The oil there may be by design and managed fastidiously. It would not fill the combustion chamber however merely coats and lubricates particular elements. However, blue smoke means there may be extra of it than there must be.

How? Apart from filling your automotive with an excessive amount of oil, the commonest reason behind this difficulty is worn piston rings. Piston rings seal the hole between the pistons’ periphery and the cylinder partitions’ inside floor. They stop oil from seeping up from the oil pan into the combustion chamber. Over time, these rings can put on out When this occurs, their capability to seal successfully is compromised, permitting oil to go via and burn with the fuel-air combination. This is a typical difficulty in older or high-mileage engines.

Another frequent motive is broken or worn valve seals. They assist management oil circulate across the engine’s valves. If they put on out, oil can leak into the combustion chamber and burn, producing blue smoke.