What does it mean when your diesel blows 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.
Why does my diesel car smoke when I start it?
According to Zack Ellison at Cummins, “White smoke is an indication of unburned diesel fuel. Normally, it would happen at startup in cold weather with lower compression engines and retarded timing. You get an incomplete combustion during startup and it causes raw diesel fuel to come out of the stack.”
Would a bad injector cause blue smoke?
This can be caused by worn/leaking injectors or restrictions in the air intake system. Blue smoke is normally the result of engine oil entering & burning inside the combustion chamber. But what we see more often than not are issues related to worn injectors.
Should a diesel smoke on startup?
A plume of white smoke is generally most noticeable at diesel startup, particularly when it’s cold. This is due to the fact that colder air, which is more dense than warm air, lowers temperatures in engine cylinders at the end of the compression stroke.
Why do I get blue smoke from my diesel engine?
Cylinder glaze – When the cylinder is glazed the rings cannot do their job of wiping the oil on the way back down and oil will pass by. 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.
What does Blue Smoke on start up mean?
Every single one of those cars had coked up valve trains and clogged oil return passages. When a mechanic was in between jobs or held up on parts they would grab one off the back lot and start in with the PITA job of cleaning the valve train up and opening up the drain holes.
Why does my marine diesel engine keep smoking?
A marine diesel that shows a bit of smoke on start-up is probably nothing to worry about, but if it keeps on smoking after a few seconds of run-time, or starts smoking after it warms up, or when you throttle up, that engine is screaming to you to get something fixed. But what’s causing the smoke, and just what needs fixing?
Can a new engine burn oil without blue smoke?
A new engine may burn oil without any evidence of blue smoke because of the good compression it can burn oil cleanly. However, it is not acceptable for any engine to burn large amounts of lubricating oil.