What does it mean when a diesel engine is blowing blue smoke?

burning engine oil
Whenever blue smoke emits from the exhaust pipe, it means the vehicle is burning engine oil. Another clue to this problem is excessive oil usage and the need to refill it frequently. Blue smoke can be caused by multiple engine problems.

What causes a knocking sound in a diesel engine?

It is the high pressure-rise rates associated with the auto-ignition of fuel during the premixed combustion stage that produces the characteristic “knocking” noise widely associated with diesel engines. This noise is often referred to as diesel knock [1] or combustion roughness [2].

Can bad diesel cause blue smoke?

Blue smoke from diesel generator occurs because of oil being burnt in the cylinders. It isn’t normal for oil to get into the combustion chamber and so blue smoke is a sure sign that something is wrong with your engine. You should contact someone qualified to have a look at it.

Can faulty glow plugs cause diesel knock?

If it does, then yes, this is contributing to the knock. What is happening is that the fuel and chamber is not hot enough for combustion and there is not enough compression built up in the engine yet. It is always best to test all glow plugs and replace if needed.

What does the blue smoke in diesel engine indicate * 2 points?

What does the blue smoke in diesel engine indicate? Explanation: Blue smoke comes out from the exhaust when there is unburnt oil in the diesel engine. A very thin layer of the oil gets deposited on the cylinder wall to provide the lubrication between the walls and the moving piston.

How do I stop my diesel from knocking?

When you run diesel purge through your engine most of these noises will disappear within ten to fifteen minutes. The lubricant in the purge will reduce the “nailing” or hammering in the injectors and the clean fuel will reduce the combustion knocking sound.

Can diesel knock damage the engine?

Diesel knock can and will destroy your engine if left unchecked.

Can a bad turbo cause blue smoke?

If your car has a turbocharger, a blown-out turbo may be causing the blue cloud behind your car. A blown-out turbo can be identified by a broken or damaged oil seal. In this case, oil gets sucked into your engine’s combustion chamber. There, oil mixes with fuel and leads to blue smoke.

What problems can Faulty glow plugs cause?

Faulty glow plugs may disturb the sensitive diesel combustion process, which in turn might result in the engine producing black smoke from the tailpipe. This is a warning sign that something is wrong either with the glow plugs or other vital components of the combustion process.

Why does my diesel engine have blue smoke?

The engine could be delivering too much fuel, not enough fuel, too much air or simply not enough air. Blue engine smoke is the rarest type of smoke emanating from a diesel engine. The presence of blue smoke is an indication of burning oil.

What to do if your diesel engine is making a knocking noise?

Nothing catastrophic can happen to your engine from this type of injector noise. In most cases, diesel purge will quiet all the noises related to your injectors and will soften up the knocking noise as well.

What kind of smoke comes from a diesel engine?

Blue Smoke: Blue engine smoke is the rarest type of smoke emanating from a diesel engine. The presence of blue smoke is an indication of burning oil. Blue smoke should not be ignored but is common when starting an engine in a cold weather.

What kind of noise does a diesel purge make?

They will tick, ping, rattle and they can even produce a snapping sound. Nothing catastrophic can happen to your engine from this type of injector noise. In most cases, diesel purge will quiet all the noises related to your injectors and will soften up the knocking noise as well.