Question about 1997 Mitsubishi Galant
When engine is turned on engine oil comes with smoke through exhast manifold also the smoke is not white it seems to have that fuel is not burning properly. also tell me what is back compression in case of engine oil
You are asking good questions, first the oil, I presume your vehicle is of high mileage? and possibly had a hard life with maybe late service intervals?
There are a few possibilities oil is being burned, first and this relates to your last question (Back compression) is worn compression piston rings, the compression of the combustion seeps past these and sends pressure through the oil scraper rings (Last set on the piston) increasing crankcase pressure which in turn forces a film of oil out of your breather pipe, the outlet is usually located on the air filter so it is drawn into the cylinders and is burned causing poor ignition and smoke from the rear.
Second and possibly combined is valve guide wear, the valves allow oil through their worn stems and seals causing a smoke haze, this usually clears a lot when engine reaches operating temp.
I hope this epic has clarified your query? please press the Blue Button for my Free! effort.
Paul 'W' U.K.
Posted on Feb 21, 2009
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Posted on Jan 02, 2017
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