Knowledge Base

Smoke coming from the engine – what is going on?

Smoke coming from the engine – what is going on? - image

Below we present possible reasons for a situation in which too much smoke is expelled from the engine.

Below we present possible reasons for a situation in which too much smoke is expelled from the engine. If white smoke is coming from a cold engine before it’s reheated, there are no reasons for concern. This results from the fact that in low temperatures the engine does not burn fuel in an optimum manner, and vapour may be emitted. However, if the car starts emitting too much white smoke, this may indicate a faulty cooling system. It should be checked whether no water is dripping from the outlet of the exhaust system. If this is the case, the coolant fluid level should be checked, along with the state of the radiator and the water pump. In order to do this with a cold engine, the radiator’s cap should be unscrewed and someone should be asked to step on the gas pedal – if the water remains still, this may indicate that something is blocking the system or that the water pump is faulty.

Another reason may by the incorrect operation of sparking plugs – in order to verify that, remove subsequent high voltage cables from the engine’s sockets with the engine on, and observe. The engine should start choking and working irregularly – if this doesn’t happen with any of the cables, the plug most probably needs replacement.

Proper lubrication is crucial for appropriate operation of the engine – if the oil is worn or polluted, this may cause smoking.

It may also make sense to try a different fuel, check the fuel injector in a garage or – in the case of older cars – the carburettor’s regulation. If none of the listed methods is effective, the reason may lie in faulty drive. Then a specialist should be consulted.