Re: smoke from back of engine after it is shut off
Well This has happened to me also. When I looked there was no oil anywhere but when I removed the head gasket, I took it appart and there was a very tiny crack which leaked oil directly onto my Manifold. So once my car got hot the tiny crack let out a few drops which smoked after the manifold gets really hot. As for yours I am not sure but i suspect its that. As for a fix I dont know one. I put my motor back together and ran it for a long long time (Trusty Volkswagen)
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You could have a bad fuel pump there are 2 pumps one is in the center of the engine block and the other is on the driver side frame ...also inside the fuel tank is the sending unit which had two small filter inside it if clogged will cause no power under load and burn out pump
assuning there is nothing major wrong, get some forte injector and use it as recommended. I once had a renault laguna diesel fail an MOT test, a roadworthiness test that is, on emissions...it was absolutely chucking out black smoke but the engine ran well. I put 2 bottles of injector cleaner in the half full tank and went out for an eighty mile drive revving the engine in the lower gears. I returned to the testing station an hour and a half later and the engine was running perfectly.
Alternatively, assuming the engine runs well but is just a little smokey, have it terracleaned, this will remove most of the carbon deposits from the engine/exhaust and should increase the life of your engine simultaneously improving fuel economy
The valve stem seals are probably shot, if it is blue smoke-oil burning. What happens is when you shut the car off, oil slips down past the bad seals and pools around the valve seat. Soon as car is started, that pooled oil goes into the cylinder. When you shut the engine off, oil under the valve cover will do the same thing again-it will pool around the valves because of the bad stem seals. A repair manual can tell you how to replace the seals without pulling the head off. An air compressor is necessary to keep pressure in the cylinder, so the valve won't fall down into the cylinder.
Black smoke is burning oil. Blue smoke is usually transmission fluid due to a leaking modulator valve in the older auto transmission. White smoke is due to water getting in to a cylinder from a bad gasket, cracked block or a cracked head.Black smoke from engines on starting and/or running tends to mean there is fuel leaking into the engine, or the fuel mix is incorrect and not atomised correctly. the main causes are normally a nakered air filter that isnt letting enough clean air into the engine to mix. a blocked fuel filter, which is either not letting enough fuel in, or in some cases, a faulty fuel filter which is letting too much fuel into the engine, and causing black smoke due to excess burning. Black smoke is a fuel/air mixture suggestion problems with injection or carbonation. Cause of black smoke is due to running rich in the fuel air mix.Check the oil,the oil leak,the air filter,the fuel pump and fuel filter to confirm the fault.
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Just had my car in the garage with horrendous white smoke coming from the exhaust. The problem with mine was a blocked crankcase breather. When blocked oil is passed into the exhaust system apparently.
Problem solved by the mechanic and half a day in the garage with the engine running to burn off the excess oil in the exhaust and the problem was solved. Had gentle ride out to the coast yesterday approx 1.5 hrs each way and the smoke has gone.
Good result for £160.00. I dread to think what the dealer would have charged.
if you drained all the water out the system needs to be blead always mesure the coolant/water so you can put the same amount in again there will be a bleeding screw on one of the hoses loosten and let all the air out. hope this helps