jacobcartmill

iTrader: (6)

well my 91 NA has been running perfectly since i got it (about 6 months ago) and i have been getting on it frequently with no problems, redlining once or twice every day or so, keeping clean oil in it, etc.

well today, i go out and start the car and alot of oil smoke came out of the exhaust for about 3-4 minutes, so i **** my pants and turned off the car. we took out the plugs and found the sparkplugs for the front rotor were very oily, and the sparkplugs for the rear rotor were normal.

here's the weird part: the leading plug hole for the rear rotor had a bit of smoke coming out of the hole when i took the plug out... we sat in a stupor for a few minutes and decided to just clean off the spark plugs, put them back in and start the car. we started it and there was little smoke, but still a small amount of oil-smoke coming out of the exhaust. so we took all the plugs out again (finding the front L and T plugs had oil on them) cleaned them out, put them back in, and started the car. everything was fine and not even enough smoke to notice.

i was thinking that one of my oil control rings is letting go, but thats why i'm posting in here, for some more opinions on what it could be...
the car runs fine, still has full power, and idles smoothly as always. does anyone have any other ideas as to what it could be? the car has NEVER done this before, and when i started it this afternoon there was ALOT of oil-smoke for 3-5 minutes.

pengarufoo

sounds like oil control rings.

have you messed with the vacuum lines at all? eliminated rats nest or anything like that? Try removing the oil filler cap while running and see if that reduces the smoke while it's happening.... if the crankcase ventilation doesnt work it gets pressurized and can force oil out past the oil control rings.

if it continues to happen even with the filler cap off I'd have to say it's most likely oil control rings... check your oil injection I guess just in case.

rotary>piston

It's probably the rings. You've been redlining when warm right? Cold redlines will really screw your oil control rings (among many other things).
You could check the oil injection, as pengarufoo said, but it's doubtful that it's the cause.


Once it's warm, hold the engine at 5000 or so for about 30 seconds. If there is smoke at any time during this then your rings are dying.

vegeta6263

your side housing might be fucked.. is ur coolant reservoir overfillling by itself ?

jacobcartmill

iTrader: (6)

????? what does this have to do with the sidehousing or the coolant?

jacobcartmill

iTrader: (6)

it only happened once. earlier this afternoon when i started it after driving it real hard the night before.

it was almost like the car just had oil sitting on the front rotor all night, then i blew it out and now the car is perfect again... we drove it around and even redlined it once or twice just to make sure it wasnt burning any oil... no smoke at all ??? we let it sit all day today and i started it when i got home today (sat for about 6-7 hours) and the engine was cold like it was earlier today, and no smoke, idled perfect... i am stumped.

drago86

Were you parked on a realy steep hill? My car will smoke if i was parked on a very steep hill the night before, or if shes beeen sitting for more then a week.

jacobcartmill

iTrader: (6)

I just had another thought... could i have a leaking or broken oil injector on my front rotor? the car still has full power, doesnt smoke once its warmed up, and this started all the sudden out of nowhere. my oil pressure is also perfect.

do you all think it could be that i have a leaking oil injector on the front rotor? this could really save my life if its just an oil injector...

jacobcartmill

iTrader: (6)

wht is the procedure for checking the oil injectors? do they open with vacuum or close with vacuum? a vac line could have popped off of one of them...