Question about Toyota Land Cruiser
Yes, because your engine is burning oil. That, in turn, means your engine has worn valve guides, piston rings An engine that burns a lot of oil (more than a quart in 500 miles) is an engine that needs to be overhauled. Normal oil consumption should be a quart or less in 1500 miles. Most newer engines consume less than half a quart of oil between oil changes (every 3000 miles). So if your engine is burning oil, it's essentially worn out and needs to be repaired.Because the cost of overhauling or replacing an engine often exceeds the value of an older car or truck, many people will just keep on driving a "mosquito fogger" in spite of the blue clouds of smoke it leaves behind. Never mind the pollution it causes, oil is cheaper than a new or rebuilt engine they reason. That philosophy may be okay if you live out in the sticks somewhere. But in urban areas that require periodic vehicle emissions testing, an engine that's burning oil usually won't pass the test because of excessive hydrocarbon (HC) emissions. You may get by on a waiver after you've spent some money (in vain) on a tune-up, but the fact remains you're still a polluter.An engine that burns a lot of oil will also eventually foul the spark plugs. Thick, black oily deposits build up on the plugs until they cease to fire. Then the engine misfires and loses power. Cleaning or changing the plugs may temporarily solve the problem, but sooner or later they'll foul out again.Forget about "miracle" oil additives or pills that claim to stop oil burning. They don't. Better to save your money and put it towards a valve job and new set of rings.
I would suspect the valve seals are worn. When you shut the engine off, the oil that is on the valve stems, slowly seeps past the seals into the combustion chamber. At start-up this oil is burned away creating the blue smoke. The oil will not seep past the seal while the engine is running. It can be fixed without removing the head but unless it get excessive, I would just take it to the garage and get the valves changed and repaired.
and black smoke is due to --airfilter, but if it began fairly suddenly I suggest you check the turbo pipes (intercooler to turbo) for soft spots.
They can delaminate internally, this obstructs the airflow and you get the black smoke because the engine is then running very rich.You are using too much fuel, thus the black smoke .... try a short highway drive... if it doesn't clear, then its garage time to have the system reset. thanks.please do rate the solutionthank you for using fixya.keep updated.
Posted on May 24, 2009
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Posted on Jan 02, 2017
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