My car always had smoke from the exhaust on 1st take offs that was whitish. It is now grey/black, even bluish maybe since I changed the oil filter yesterday. Dont have a blown head to my notice, she runs and drives, just rough. Also recently started a rat tat tat and loud knocking like sound from the engine. I usually noticed this kind of noise but less extreme if u ran out of oil, she burns it quickly. Oil is topped off, iv tried all weights that are safe to see if it would ease the noise but I'm afraid it may only be getting worse. I definitely think it COULD be oil related since the knock is SIMILAR but its not exactly the same, its louder and rougher. Also dealing with a crap battery which has added to the poor performance of her but once u get her going she usually opens up like she should for u. Any ideas on what it could be or what would fix this? Or if its a dying or dead motor or..anything?! I'm desperate to get my car going if possible but if not I need i know, I'm a single mama and would need to handle the works ASAP!
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If the smoke from the exhaust pipe is either grey or bluish-tinged, it generally means that your engine is burning oil inside the combustion chamber. Burning oil could be due to a number of causes, from leaky valve seals to bad piston rings. take to reputable repair shop
That is probably the head gasket leaking. White smoke is from antifreeze going through the exhaust. The engine compression is pushing the water out of the radiator.
Hi Kieth, It would help to know more about your vehicles problem. Is the smoke very dark or is it a bluish grey? Have you noticed heavier fuel consumption or are you using more engine oil than usual? Is the smoke continuous or does it come only during acceleration? Let us know as many details about the fault and the vehicle as possible and in that way we will be able to offer more help. Regards John
Are you sure it's burning the oil? Check your oil pan gasket and valve cover gaskets for leaks. Is the car smoking? (light grayish or white smoke is oil, black or dark bluish is fuel) Could be bad valve seals. Also, main seals can leak oil out onto exhaust parts.
More specifically you will have trouble starting the car. When the ECTS is bad the PCM reads it that the engine is at -40F. This means that it will dump tons of fuel into the engine in order to warm it up. You may also experience rough idling due to the rich fuel mixture and black smoke from the exhaust (which is an indication of running rich, burnt fuel).
Is it gray, bluish gray, or white? White smoke, during warm weather, indicates that you have a head gasket out and it's vaporizing water, it will look much like it does when you first start it on a cold day. Bluish gray indicates burning oil, which could be bad valve seating, severe engine wear on your piston rings and oil is blowing past them into the combustion chamber. Grey smoke is probably water as well, though it could be contaminated with oil, or the vehicle could be running too rich, getting too much gasoline. But typically this is more of a black smoke than gray.
Smoke usually there's a problem.... Bluish gray smoke means you're burning oil (could be a number of things like piston rings, valve seals)... White smoke means could mean you're burning transmission fluid, or there's a crack in the gasket or engine block.... Black smoke could mean you need your air filter changed, bad fuel injectors, bad distributor cap, ignition coil... I would guess it's probably black smoke coming out of your exhaust from the sounds of your symptoms...
Has to be a small oil leak above the exhaust header or pipe...Possibly the rear of the valve cover gasket...because the engine slopes to the rear, oil collects there, and drips off onto the exhaust. (I'm a 30 year retired British Leyland auto tech)
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