Engine smokes at idle

This will cause white smoke , along with the idle issue. This is very easy to recognize since there is a difference between burning gasoline explosion and a burning oil explosion. Causes of Diesel Engine Smoke - By Color A brand new diesel engine running at full load will experience a little bit of blow-by upon startup. Blow-by is a condition where diesel fuel, air and vapor are pushed past the rings into the crankcase of the engine.

In many cases, white smoke emanating from the tailpipe (often at idle once the engine reached operating temperature) typically means a worn out injector. If you drive one, or see one on the roa you can easily spot a truck with injector issues. Now this isn’t always the case, but after some trouble shooting we’re usually the go-to shop when diesel drivers need refurbishe rebuilt, or new injectors.

A common issue with the GM 6. L LBDuramax engine is white smoke at idle. At an idle (and worse in gear) these early Duramaxes will haze smoke at idle. INJECTORS STUCK OPEN OR WITH EXCESSIVELY LEAKING NOZZLES DIANOSIS 1. Major symptom is blue smoke out exhaust at idle after engine is warmed-up. Worn and damaged injectors are often the cause however there are other causes and considerations that should be looked at prior to injector replacement. Smoking at idle is almost always the turbo or the valve stem seals.

No blue smoke at start-up when engine cold. If it smokes under the boost its the turbo or the piston rings. Car blowing blue smoke after sitting at idle. Consistent smoke coming from the exhaust most likely indicates a deeper internal problem with the engine. A small puff of smoke during quick acceleration is acceptable with older diesel engines due to a lag before the turbocharger’s air flow can match the increased volume of diesel fuel injected into the cylinders.

Smoke at idle or during decelleration (high manifold vacuum conditions) is often the result of a bit of oil being pulled past the intake valve guides into the combustion chamber. The valve stem seals could be damaged or installed improperly, but they can usually be readily fixed with the heads in place. It did exactly the same thing.

Many years ago I rebuilt a continental engine , all they could get were high speed chrome rings. Tore it back down and swapped with cast rings from another engine. No more smoke after idle. But check everything else first.

Rich is Black or Dark gray smoke, not blue. No smoke on highway (that I can see). Constant blue smoke on a turbocharged diesel is unlikely to be caused by worn valve stem seals.

The start the engine drop in in drive and hammer the throttle to spool up the turbo. Regardless of engine type, worn valve stem seals tend to cause smoke at start-up and at idle. Let it idle min and the spool it again. Any oil the turbo is leaking in the intake side will be blown out for you to see as it paints everything.

Direct injection engine gets carbon build up on valves. Maybe the valve guides. It does not smoke at startup. Anyway you look at it, the manufacturer is trying to fix the problem as economically as possible. As you can imagine engine oil is present all welcome throughout the engine as it lubricates internal parts.

A blue smoke condition is typically present when the engine is under load and at first start up after sitting for a few hours. The combustion chamber is the exception. Each engine has valves that open and close.

This chamber must stay as oil free as possible to.