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Blue exhaust smoke in a diesel vehicle could still mean oil is being burned, but it could also mean the engine oil is being atomized. This could be caused by: High engine oil levels. Worn out piston rings. Old valves or cylinders.
How do you fix a blue smoke from a diesel engine?
How to Fix Blue Smoke from Exhaust Remove Excess Oil. The simplest fix is to remove some oil from the system. Clean Engine. If the engine hasn’t been cleaned in a while, it’s time to take a look at it. Replace Piston Rings. Fix Turbocharger. Replace PCV Valve. Repair Valve Seals.
What causes blue smoke in diesel engine?
Blue Smoke: 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. The oil thins out when it is cold and some could escape into the cylinder and be burnt.
Is blue smoke bad for a diesel?
No amount of blue smoke is normal. However, it is not acceptable for any engine to burn large amounts of lubricating oil. A great thing to do as a preventive for your diesel engine is an oil and fuel additive.
Can a faulty diesel injector cause blue smoke?
Even diesel, which is a type of light oil, only makes white smoke. Most oil burning makes what looks like blue smoke. This would be from faulty valve guides/seals or bad rings/overwhelmed or bad blow-by management. Blue smoke is NOT coming from a fuel injector.
Can a blown head gasket cause blue smoke?
The most common sign of a blown head gasket is exhaust smoke. White smoke indicates that your car is burning coolant that is leaking into the cylinders. A similar problem is indicated by blue exhaust smoke, though this is a sign of oil leaking from the gasket.
What does Blue smoke indicate?
Blue/gray exhaust smoke means there’s likely an oil leak and your engine is burning oil. Time to have a qualified technician check things out. The leak could be caused by several issues like leaking valve seals, damaged piston rings, or worn cylinder walls.
Can thin oil cause blue smoke?
It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke. 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.
Should a diesel smoke on startup?
It is acceptable for all but the most modern diesels to experience white smoke at startup. But this should disappear after the engine warms up.
Why do diesels last longer?
Diesel Fuel Another reason diesel engines last longer than gas engines is due to the fuel that they burn. Diesel fuel is a type of distillate fuel that is essentially produced from crude oil, which gives diesel engines slower cylinder wear than gasoline engines. Gasoline also burns much quicker than diesel fuel.
What does grey smoke from a diesel mean?
Grey smoke from the exhaust: This could be excess oil, a PCV valve failure or a transmission fluid leak on automatic cars. In diesel cars it’s more likely to be soot build-up or the diesel particulate filter cleaning itself.
How do you clean diesel injectors?
The best way to clean fuel injectors on a regular basis is to use a diesel fuel cleaner additive. This can be added to the fuel tank periodically to cycle through your engine. If done regularly, maybe once or twice a month, it can keep gunk and debris from building up in your fuel injection system.
Why does blue smoke come out of my exhaust?
Blue smoke can often look like grey smoke at first. But if you notice a distinctive bluish tint, it may signal that the engine is burning lots of oil. This could be due to worn engine components like piston rings, valve seals, or PCV (Positive Crankcase Ventilation) valves.
What does GREY smoke mean?
White smoke can often mean material is off-gassing moisture and water vapor, meaning the fire is just starting to consume material. Grey smoke can indicate that the fire is slowing down and running out of materials to burn.
What color smoke is a blown head gasket?
White Exhaust Smoke White smoke billowing out of your exhaust means that coolant is likely leaking into the cylinders. This usually happens when there has been a breach in the head gasket, which makes the coolant create this white steam. Have it taken care of before the breach gets bigger and bigger.
How do you diagnose blue smoke from exhaust?
If you are noticing blue smoke from the exhaust, it means your engine is burning oil due to an oil leak. This symptom could be the result of a leaking valve seal or a problem with a piston ring. What is happening is that the engine seals are not effectively sealing the oil from getting into the cylinders.
Can synthetic oil cause blue smoke?
A switch to a more stable, synthetic oil would be the way to stop a blue-tinged smoke from emerging from the exhaust. However, if the exhaust is smoking with synthetic oil already in the engine, the problem is most likely not with the oil. It will likely lead to the area of the engine causing the smoke.
