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2G white smoke from tailpipe

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Allen2g

Proven Member
91
3
Jan 9, 2019
Winnipeg, MB_Canada
im gonna go nuts!! so white smokes been coming out of my tailpipe, compression test was good so i dont think its the HG, i have no cooling issues as well. I went and checked the stock t25 & there was in and out play(LOTS) so i suspected it being the problem. Went ahead and replaced it with a small 16g(0 shaftplay), replaced my waterpump/belt as well and theres still smoke even after all that. :(
could it be exhaust leak? boost leaks, pcv? ahh
 
Could be too high oil pressure or feeding too much oil. Could be bad oil seals (don't have much shaft play doesn't 100% guarantee that you have good seals). Could be a bad PCV valve or bad valve stem seals, too.
 
How exactly can you check whether u have bad seals? ALso imma go replace the pcv and see if it does anything, honestly think this has never been replaced for so long aha. & im feeding the turbo from the head and not the ofh so i dont think its getting too of a high oil pressure
 
Update: did a compression test, got exactly 120 on all cyls, really weird. Its rly low and it jumped to 120 on all four cyls and stayed there. Also i have oil on my spark plugs, heres a pic of how they look. Opinions?
 

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Yeahp it was wide open, gas pedal was pressed now. Its weird cause it jumped to 120 as soon as i started cranking and stayed there.< Happened on all four cyls

edit: also wanted to note that at first initial start up there is no smoke and about 1 minute of idle it starts smoking, smokes as well when revved.
 
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Valve stem seals

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Could be valve stem seals, since i dont think its my HG, literally drove it for like 4 days straight and 0 signs of over heating, needle rests right at the middle of the temp gauge. Would valve stem seals cause oil on spark plug threads as well?
 
If I were you, anyways I would do a leakdown test. or at least I would remove intake/exhaust manifold, intake/intercooler pipings and O2 housing to see if it has some sign of oil leak.
Most likely, from turbo, bad PCV or bad stem seals. In the worst case scenario, could be damaged ringlands or/and damaged piston rings.
Are you positive that the coolant is not getting low?
 
If I were you, anyways I would do a leakdown test. or at least I would remove intake/exhaust manifold, intake/intercooler pipings and O2 housing to see if it has some sign of oil leak.
Most likely, from turbo, bad PCV or bad stem seals. In the worst case scenario, could be damaged ringlands or/and damaged piston rings.
Are you positive that the coolant is not getting low?
The oem IC rubber hose that connects to the intake manifold had oil and some oil residue on the manifold as well. Intake pipe on turbo i see no oil. Also i think i am losing some coolant, i marked a line on my coolant res where the coolant was after my engine fully cooled, drove it during the day and at night after fully cooled the coolant was lower than the marked line which seems it was burned since i have no coolant leak that i can see anywhere. Im assuming if im still burning coolant its probably this s16g that i bought off someone locally since even tho my compression was low, it was all 120 across all cyls which cant be a hg. Ill have to do another comp test dry/wet and with a new tester to make sure of my compression
 
The oem IC rubber hose that connects to the intake manifold had oil and some oil residue on the manifold as well. Intake pipe on turbo i see no oil. Also i think i am losing some coolant, i marked a line on my coolant res where the coolant was after my engine fully cooled, drove it during the day and at night after fully cooled the coolant was lower than the marked line which seems it was burned since i have no coolant leak that i can see anywhere. Im assuming if im still burning coolant its probably this s16g that i bought off someone locally since even tho my compression was low, it was all 120 across all cyls which cant be a hg. Ill have to do another comp test dry/wet and with a new tester to make sure of my compression
I asked you about the coolant level because still could be head gasket sealing issue. Well possibility is thin, but in case if it was vapor (it wasn't smoke) you can probably see some coolant on piston top in the morning before start the engine.
You should check exhaust side especially... At least you may be able to know if the oil leak comes from pre or post turbo.
In case if the issue is damaged ringland or piston rings, sometimes it would be difficult to distinguish the issue with only compression test. I highly recommend you to do a leakdown test. It is different form compression test. You can also check the head gasket at the same time.
 
Yes ill probably do a compression test but im waiting on when im free to do another comp test with another tester. Ill be doing a dry and wet test and that should tell me whether my valves or piston rings are bad.
 
Sounds like either bad valve stem seals (not starting till warm = high vacuum building pulling oil through) or pcv system not up to par (I recommend baffled catch cans with metal check valves).
While it could be a leaky hg, description leads me away from that, as I'd expect white smoke right on start up, as well as clean plugs from steam explosion, or at least different coloration. The lack of lost coolant is also an indication it's no a hg.

What does the smoke smell like? Maple syrup/sweet smell? Coolant. Normal exhaust/fuel/oil smell? Self explanatory. Check at night and shine a light through the smoke, if you see a blue-ish tint to it, that confirms oil burning. Also your compression is pretty low so I don't doubt you're getting some oil consumption from that. My car burns a little oil and I have 155psi cold compression, though mine was a stock bore diy rebuild so I expected it.

Unless you're exhaust has a bunch of water pooled in it that's vaporizing after it warms up.
 
Yeah its kinda way too low which leads me to either a broken tester which ill be retesting today with a new tester or piston rings/something with valves. Ill find out later today by doing a wet and dry comp test. Tbh i really dont think its a HG and like u said the smoke doesnt rly happen on start up more like after 2 mins after start. ive also driven it the past week with no overheating issues.
My plugs had oil on the threads, i shpuld have a pic of it up there at post #5 but ill put the pic again.
 

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Oil on threads is coming from the well seals leaking or excessive crankcase pressure blowing oil into/past the well seals. I am leading toward wore oil rings on the issue, although valve stem seals will give you the same problem. Does it get worse when you get into boost?
 
Could be:

Valve Cover
Valve Stems
PCV
Piston Rings
Bad Turbo

What did the head look like when you pulled the turbo? Or did you not remove the exhaust manifold?

Buy a catchcan regardless. Ebay has cheap cans you can baffle. Check my profile or IG if you need ideas.
 
Oil on threads is coming from the well seals leaking or excessive crankcase pressure blowing oil into/past the well seals. I am leading toward wore oil rings on the issue, although valve stem seals will give you the same problem. Does it get worse when you get into boost?
I have not really been getting into boost as my wastegate line isnt connected so i dont notice, definitely still smoking when im cruising tho, when im at a light as well. When i rev more smoke seems to come out.
 
Could be:

Valve Cover
Valve Stems
PCV
Piston Rings
Bad Turbo

What did the head look like when you pulled the turbo? Or did you not remove the exhaust manifold?

Buy a catchcan regardless. Ebay has cheap cans you can baffle. Check my profile or IG if you need ideas.
Tbh i dont remember i did not pay attention LOL. Yeah im really better on either rings or something with valves. Ill be deleting the PCV and put in a baffled catch can with three ports and see if that helps with anything. Not too sure if i have that much crank case pressure as my dipstick does not pop out or anything. When i took off my IC rubber hose that connects to the manifold def so some oil tho. Could of been from my old turbo or maybe blow by?
 
so.. GOOD NEWS. IT WAS A FALSE ALARM ahaha. LOL. I was actually so scared but my compression was 175 175 168 165 from the other compression tester LOL.
So thats a really good sigh. No problems internally at all im guessing. But there is still smoke and its not coolant, doesnt smell sweet. Also my coolant was actually not getting burned, false alarm there too.
So im betting on either a bad seal on the turbo? No smoke when i start it up then starts smoking after a few minutes thinking after the turbo heats up it starts smoking LOL.
Could also be blow by? thoughts?
thank you!!
 
Maybe the turbo, but usually it will smoke on start up from residue if it's that bad to start.

I'm thinking it's valve stem seals or blowby, valve stem seals stick out cuz usually you'd see more blowby when cold, at least that's been my experience.
 
okayokay, i have a catch can one of those mishimoto reps which ive heard are really good. Gonna install it tomorrow and see if it does anything. If it doesnt its either the stem seals or turbo?
i wanna note that im in canada, where its around -15 to -20 rn LOL
 
Keep in mind white smoke from exhaust is nearly always burning coolant - usually HG or turbo seals. In rare cases it may be a crack in a housing that has coolant in it (eg. pretty rare but the 2g throttle body has coolant lines connected so if the housing was cracked in the right place there...right down the intake mani it goes).
 
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Keep in mind white smoke from exhaust is nearly always burning coolant - usually HG or turbo seals. In rare cases it may be a crack in a housing that has coolant in it (eg. pretty rare but the 2g throttle body has coolant lines connected so if the housing was cracked in the right place there...right down the intake mani it goes).
I really dont think its coolant, my coolant level isnt getting lower the smoke doesnt smell sweet at all as well. I hope its nothing like a crack housing.
A turbo with 0 shaft play can still burn oil/coolant right? Cause i think its my turbo, i got it off a guy locally and its an ebay 16g, and he claimed it was rebuilt. My fault on my end, i was pretty new to dsms at the time and was in a rush to get a new turbo.
 
eBay 16g? It’s probably that smoking. And do not delete your pcv. I run two catchcans and my pcv still.
Yeah, fault on my part, i wasnt thinking and was kind of a noob at the time. Still a noob LOL. No pcv delete? I watched a vid of someone saying delete pcv then run a line to the can from there
 
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