ok, might have hurt the rear turbo seal?

Well, alot of you know, I dropped my oil pan to reseal it. drained all the oil, but the oil filter had maybe 200 miles on it so I didnt change it out. Put 5 qts in of 10-30w castrol syntec blend. I was driving Sat and al of a sudden had a ton of smoke behind me. Never happened before. Took her home, pulled out the intake pipes, checked the front turbo, not much shaft play. Checked the rear, minimal shaft play. checked everywhere on block and no leaks, cam seal are good, no leaks. drained about 1/2 qt of oil. just under top notch on dipstick. perfect now. drove it this morning to work...(E85 hates 19 degrees outside starts ) when i would get on it it wuld give a little puff. no smoke at idle, only some on down shifting thats y I think the seal could be bad.

Im hoping that there is residual oil still being burned off thats y it smokes abit. It doesnt billow out just a little on shifts when I get on it. If I did blow the seal then I have no one to blame but myself on that one.

When I had my bad 15g's, I dropped the downpipe and at idle and reving it it would smoke like it was on fire coming out of the front bank. It doesnt smoke at all at idle even when I rev it pretty high. so Thats y i am not sure.

MIke

Sounds exactly like the problem I'm having. I can let it sit at idle forever and get no smoke, but if I drive around and get into boost and then let off I get a pretty good puff of smoke and then it's gone. Started off with small cloud but recently has gotten worse and now will let out a puff if I rev it at idle and let it come back down, but once it settles at idle smoke is gone. I'm pretty sure it's my rear turbo seals since rear IC pipes have oil and front does not.

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Originally Posted by mh3kgt

Sounds exactly like the problem I'm having. I can let it sit at idle forever and get no smoke, but if I drive around and get into boost and then let off I get a pretty good puff of smoke and then it's gone. Started off with small cloud but recently has gotten worse and now will let out a puff if I rev it at idle and let it come back down, but once it settles at idle smoke is gone. I'm pretty sure it's my rear turbo seals since rear IC pipes have oil and front does not.

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I am planning on updating your other thread on PCV valves. I finally got my oil catch can installed where the vapor canistor used to be, with BIG(19mm) tubing. Haven't had a chance to run it WOT yet to see how it handles smoke @ decel after boost.

OP check your crank venting tubes are not clogged up. Do you have oil in the bubble (leading to the rear turbo)? Its common for the PCV valve to be overrun in our cars.

I have a new pcv valve and DR racing krank vents. I have blow thru so no bubble. No oil in my dejon twin takes either. I am going to pull the the dp tonight and check to see if any smoke comes from the front or rear banks.

I noticed that I had a bit of oil in my bubble leading to the rear turbo as well. Looks like it was coming from the rear head vent tube that runs into the bubble. I've replaced the PCV since then, but still have a puff of smoke on decel after boost. Would VSS cause any of this? I doubt it since I am seeing oil in my IC piping on rear turbo, sounds more like turbo seals to me but I've been fooled before.

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Originally Posted by mh3kgt

I noticed that I had a bit of oil in my bubble leading to the rear turbo as well. Looks like it was coming from the rear head vent tube that runs into the bubble. I've replaced the PCV since then, but still have a puff of smoke on decel after boost. Would VSS cause any of this? I doubt it since I am seeing oil in my IC piping on rear turbo, sounds more like turbo seals to me but I've been fooled before.

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im telling you this, drop your downpipe, idle the car and look under the car and see if there is anysmoke coming from the front or rear bank. If it is coming from the rear which soulnds like it is...then vuwalauh...bad turbo. vss will smoke on idle more or less. im prety sure its your turbo. Just upgrade or get it rebuilt. Seems like what I might need to do.

Yeah that was my plan for this coming weekend if I can find the time. I've pretty much ruled out all else but the turbo seals. I've been meaning to drop the DP and check it out that way, but just haven't made the time since I don't drive it that much anymore because of a few issues I'm slowly sorting out. I'm gonna try to rebuild them myself if they're smoking and save up to convert the 9b's I just bought to 19T's :)

*EDIT* how many miles have you got on your 19t's now? I think I've got roughly ~1k on mine, but I'm pretty sure I killed the turbo seals by accidentally overfilling it with oil once :facepalm:

I'll post more later but for now, where are you blow through guys running the tube that was on the bubble?

i have a pepsi can...lol

I'm speed density but am still using the stock bubble for now. When I get twin intakes I plan on just putting a breather filter on the nipple from the rear head to bubble

Well I know somebody that had it blocked off and he had bad trouble with smoking (no place for pressure to go). These engines seem to have a...well....shitty PVC system. I have always been plagued with crankcase pressure pushing oil out of the exhaust turbo seals and it appears to be worse after a fresh engine rebuild. I finally just broke down and vented the crankcase and no more smoke. This is such a common problem with these cars. So many threads, Krank Vents, new PVC's, TURBOS! I'm done with screwing with this PVC system. I ran hoses off all four corners of the heads and vented them to atmosphere.

vented the valve covers you mean?

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Originally Posted by Sin'sVr4

vented the valve covers you mean?

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Yes, that is what he means. Any tubing should, even to a pepsi can, be 3/8" dia min, but its arguable that even this may be too small. Also, it should not be blocked off, needs to have pressure relief to somewhere; atmosphere. I am considering enlarging the nipple on intake manifold to bubble; but waiting to see how the oil catch can works with stock nipple.

This was posted by Steve68 a while ago in another thread, I found it very helpful/informative.
DIYEFI.org Forum - View topic - Crank Case Ventilation

u know what, I just broke my pcv vavle port and i am going to drill it out and use a bigger vent port on the front valve cover and see how that goes.

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Originally Posted by Sin'sVr4

vented the valve covers you mean?

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The pressure in the valve cover is the pressure that is in the crankcase via oil passages ect. So venting them is venting the crankcase. It’s just the highest point of the engine so oil is less likely to escape.

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Originally Posted by Sin'sVr4

u know what, I just broke my pcv vavle port and i am going to drill it out and use a bigger vent port on the front valve cover and see how that goes.

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I ended up cutting the nipple off the valve and gutting it, then grinded a groove around it so I could clamp a bigger hose on it. I was going to take pics of it before I put it on but forgot.

If you want pics of what I did I can send them to you. You do not want to run that hose back to the intake like it was.

send me pics :)

I'll get them to you when I get off work.