So i changed my plugs today, and they looked awful. No. 6 and 2 cyl's were just filled with oil. I am smoking when laying on it. Looks like a darker color smoke, but i can't tell for sure. I can see it in my rear view when i let someone get close to me and i lay on it. My head was redone with new valve stem seals, so i doubt it is that. I have not changed my plugs nor have i changed the coil pack. Could this be from the turbo going, i doubt that either, because all the cylinders would have wet spark plugs. I am at a loss, need some help.
Spark Plug Change Issue
- Thread starter huntin5L
- Start date
i know in my 1g when i lay into her real good she gives a nice little puff of dark colored smoke and its cuz my turbos are going out the seals are dead. so it may be.
rings. turbo, or a combination of both.
do a compression test. if you get any low numbers put a few drops of oil into that combustion chamber and see if that reading rises. if it does, your rings are worn.
check your intake manifold runners for pooled oil, if there is oil there its most likely coming there from the turbo when boosting.
do a compression test. if you get any low numbers put a few drops of oil into that combustion chamber and see if that reading rises. if it does, your rings are worn.
check your intake manifold runners for pooled oil, if there is oil there its most likely coming there from the turbo when boosting.
You said that the 6th & the 2nd was filled with oil so when you opened the spark plug to change it this oil which was covering the spark plug went inside the engine and made that smoke which will disappear after a while if it didn't disappear then you might have a problem with your engine
I was having a similar problem, but only with #6.
I know it's a bad ring, and will require a rebuild before I start adding more boost, but the band-aid fix is to use 'restore' additive(any 'compression restoring' type additive should work) and I'm running 20w50 now.
It still smokes under full throttle, but just a little gray smoke.
I know it's a bad ring, and will require a rebuild before I start adding more boost, but the band-aid fix is to use 'restore' additive(any 'compression restoring' type additive should work) and I'm running 20w50 now.
It still smokes under full throttle, but just a little gray smoke.
N
NDBoost
Guest
i vote for valve cover gaskets too, i know mine didnt seal well because of dirt etc that had collected on the mating surface of the head and valve cover gaskets, cleaned it all up and it appears to be not leaking anymore.
Run a compression test, as lagged said and then also clean up your spark plug valleys get all the oil out, buy new gaskets and use some FIPG/Silicone Sealant on the gaskets to help seal them better; Torque those bolts down hefty and try doing them all evenly just like you would with the head. Center to outer criss cross that way you get it all nice and even.
I have the same problem except i smoke on cold start ups, and when coming out of boost. I had leaky valve covers, but i havent had the chance to run a compression test. Im also noticing oil on the intake lip of the turbo.
Run a compression test, as lagged said and then also clean up your spark plug valleys get all the oil out, buy new gaskets and use some FIPG/Silicone Sealant on the gaskets to help seal them better; Torque those bolts down hefty and try doing them all evenly just like you would with the head. Center to outer criss cross that way you get it all nice and even.
I have the same problem except i smoke on cold start ups, and when coming out of boost. I had leaky valve covers, but i havent had the chance to run a compression test. Im also noticing oil on the intake lip of the turbo.
N
NDBoost
Guest
if you mean remove the hoses from the intake and cap off the holes thats a bad idea.
You need a way to vent the Crank case gasses i know this for a fact because i have heard people on sf and sm blow out main seals and all sorts of nasty things... I just wasnt aware that the oil on the lip was a direct result from the PCV. I will check the lower IC, the upper IC does have a bit of oil..
You need a way to vent the Crank case gasses i know this for a fact because i have heard people on sf and sm blow out main seals and all sorts of nasty things... I just wasnt aware that the oil on the lip was a direct result from the PCV. I will check the lower IC, the upper IC does have a bit of oil..
Sorry, I didn't mean cap off the PCV totally, just the one pipe that connects to the intake. When you boost it forces air through that tube, picking up way too much oil.
Just leave the metal tube that goes from the valve covers to the intake in place and cap off the part that connects it to the intake.
And when you remove the lower IC hose, have a towel and some cardboard handy.
Just leave the metal tube that goes from the valve covers to the intake in place and cap off the part that connects it to the intake.
And when you remove the lower IC hose, have a towel and some cardboard handy.
N
NDBoost
Guest
ah i get whatcha mean, im actually thinking about just getting a catch can setup to catch all that oil if any is dumped out..aaronc222 said:
My valve cover gasket was leaking a few weeks back, but a new one replaced it. I can't see any smoke during the day, but at night i can see it in other people's headlights when i lay on it. The car is running a lot better with the new plugs that i might add. Also, i just had my head surfaced for my new mhg, which came with new gaskets and seals, so there shouldn't be an issue there. Also, i shouldn't forget to mention this. Whomever surfaced my head put in champion spark plugs, i still have yet to look up the number to even see if they are for the supra. Last summer i remember taking the intercooler pipe that connects to the fender ic pipe and it had oily sludge in there....Like a brownish dark color. Thought i would add that. Ill also try the lagged method 
If he caps the PCV line going to the accordian where is the blowby going to go under boost? Into the TB? Guess again. Why do you suppose turbos have that line and N/As don't? Or that it's connected upstream of the turbo? And why would leaky valve covers cause oil in the combusion chamber? I'm confused...
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Some is normal but not much. If blowby is excessive it condenses in the IC as the air is cooled. The water soon evaporates under the influence of the charge temp and leaves the oil behind. If you have crap in your IC you have excessive blowby. Fwiw my car has never had more than a trace of oil in the IC piping and the TB remains clean..
Some blowby is normal, as is staining of the TB. You need to clean the TB once in a while, either by removing it (best) or doing it insitu by solvent injection. Excessive blowby means you need a ring job or head work. Put a manometer on the valve covers and go from there.