hey, my car has been blowing blue smoke when fully warmed up. When I check inside the #5 and #6 cylinder, there is oil inside those cylinders. It looks like the oil is leaking from the spark plugs down into the cylinders. Is it leaking from the camshaft seals, because that is what someone told me. Also when I try to get some boost it would bog and black smoke would come out of the exhuast. I know that black smoke indicates that it's running too rich, but what could be causing it to do that? Please, any info would help, thanks. :wtc:
oil in piston #5 and #6
- Thread starter superiorsupra
- Start date
valve seals or piston rings.
Usually when it leaks thru the vavle seals car blows white smoke when you accelerate..I think blue smoke means alot of oil and that is caused by oil leaking past the rings....With oil in your cylinders there wont be complete combustion so black smoke...
Run a compression test.
cheers,
Roy
Usually when it leaks thru the vavle seals car blows white smoke when you accelerate..I think blue smoke means alot of oil and that is caused by oil leaking past the rings....With oil in your cylinders there wont be complete combustion so black smoke...
Run a compression test.
cheers,
Roy
thanks for the reply, yeah the piston rings was the first thing that I thought it was going to be, but was just checking if it could be anything else. I've already got all my stuff ready for a full rebuilt, ( JE piston set (0.040), new main ad rod bearings, HKS mhg, ARP head bolts, etc.) just trying to find a good machine shop around my area that would do the job for me. Thanks a lot for you reply.
valve seals will only blow smoke on a fresh start after sitting all night, and if they are really bad then the engine will smoke after idling(when engine vacuum is highest)for a lil while. valve seals just prevent oil from being pulled intp the cylenders while the engine is under vacuum.
Also when engine braking from speed then accelerating if the seals are bad you'll get a puff of blue smoke.(much higher vac than idling as well as a LOT of oil pumped up top into the cam boxes)kaz87supra said:
how about your cam cover seals? if they're leaking, it'll go right down into the spark plug area, and seep into the cylanders... easy fix if thats the problem. if it is, then do the camcover bolt upgrade while you're replacing the seals!
-shaeff
-shaeff
shaeff said:
umm... oil on top of the spark plugs wont get oil in the cylenders.
spark plugs have metal gaskets on them.
i understand that oil migrates and all. and maybe after years of sitting with oil in the spark plug holes and the engine never being started, you might see and oily residue on the cylender head when u pull it off. there will never be enought to make smoke.
kaz87supra said:
hey man, i'm speaking from experience, unfortunately. trust me, it got in the cylanders, but maybe mine was a special 7mge.
it would seep in overnight, i'm not saying it constantly went in. and no it wasnt my valve seals.
-shaeff
Last edited:
hey guys, thanks for all the replys. The car blows a lot of blue smoke when warm up but doesn't do it constantly. It only does it when I stop at a light or something, and when I go, lots of blue smoke everywhere. My mechanic is saying that it is the piston rings that are bad. He also said that the reason for it running rich when boosting is because of the low compression in the cylinders that is causing it. Anyhow, I am currently getting ready for a full rebuilt with je pistons, rings, and such, and will post up pictures of it as soon as I do so. Thanks guys for all your input.
pull the pcv hoses off and feel for lots of blowby. It shouldn't be much air or smoke comming out. Your problem sounded similar to mine. Mine was the exhaust turbo seal blowing oil everywhere. It even blew oil up into the exhaust manifold, but sure enough....a new turbo fixed the problem quite quickly 