visible blue smoke came out of tail pipe; checked
oil level (very low); added oil (added 1 qt 5W-30 along with Motor
no more smoke (at least for now) 02/28/2009. I changed the PCV valve on
03/01/2009 but it looks like the old one I replaced is still in pretty
Background: I brought this 1998 4Runner on 02/20/2009. It
passed emission without any problem. No leaks on the ground. I changed the
engine oil and added gas treatment. 185 miles later, the above symptom
occurred. When the oil is at the proper
level, no visible smoke comes out of the tailpipe.But when the oil is low, smoke comes
out.Any idea what can be wrong? Any
help would be highly appreciated.
One more piece of detail to add... I also find oil inside
the air filter compartment. Can just a bad PVC valve cause this? Thanks.
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More than likely u have a leaking valve cover gasket unless your seeing smoke than it might have a burnt valve guide or guides if its smoking real bad than it could have bad rings and you don't want that cause then u half to tear the motor down basically rebuilding the motor
blue smoke at start up is a very common problem for BMW's starting about 10 years old. It is caused by the Oil Seperator Valve (OSV). The OSV catches all the oil that might push past the rings and recycles it to the oil pan. Replace the OSV and the symptom is solved.
If you are adding oil to the engine I would say the rings or valve guides are worn out. Could also be a problem with the PCV valve. Black smoke is usually too much fuel, blue smoke is usually burning oil.
Slight engine wear. Would advise using a heavier oil. The 5w 30 is great with low mileage. As an engine wears & the miles add up the internal parts get looser & a heavier oil should be used to help. Would start using 40 weight oil. Some smoking will continue but you should see a decrease in the morning start up & a rise in pressure during the day. There's also the STP & other motor oil honey/additives that can help these symptoms.
Is it really burning it, or just losing it? If you have blue smoke coming out your tail pipe, and oily black spark plugs, there's really not a whole lot you can do about it short of a rebuild of your engine.
It really sounds like a rear main seal leak, or a faulty oil filter.
Bad Piston,Bad rings,bad valve seals,Cracked cylinder head.cracked block. Don't forget now there is a lot of suction and compression going on in a motor. If any of the above are happening in an engine the suction will pass oil through a bad piston or rings or any of the above and cause Blue smoke and spit oil out the exaust along with blue smoke.
If there is blue smoke coming out the tail pipe it is burning oil. If there is not blue smoke then it's not burning it would be leaking. And have you checked the oil level? Are you adding oil? if it has smoke in the engine compartment then it could be a intake manifold seal but need more information to help you.
you may have an oil leak and the oil is burning off of the hot exhaust or engine youll have to open the hood in order to decipher where the oil is coming from. or if its even oil it could be transmission fluid coolant a number of things youll have to see if you can tell exactly what it is thats leaking but my best guess is its probably oil.if it is oil its more than likely coming from the valve cover. id check there first.