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Old 12-06-2012, 03:29 PM   #1
JUICEB0X
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Default Is it likely to have a leaking/burning oil turbo with no shaft play?

So, I'm worried that the red 92x I bought has severe blow by. I thought the turbo was going out, so I got a turbo which was advertised to have zero shaft play, it has shaft play.

Whatever, it's not enough to hit the sides. Anyway, I thought my turbo would have crazy shaft play because sometimes it smokes. It's a cobb AP stage 2 tune, catless uppipe, shorty downpipe with STi cat, STI CBE.

The symptoms are...

Sometimes I'll rev it and there is light blue smoke coming out the tailpipe. Not a noticeable difference in oil level, or coolant level... It's just sometimes smokes. Like, the other day in the drive-through, I was at idle for 60 seconds or so, then when I went forward a plume of smoke came out. When I got home, I gave it a couple ~2500 rpm revs and looked for smoke, nothing. So, it's an intermittent problem. So I took the downpipe off to check for shaft play, expecting quite a bit, there was none. So now I'm worried that it has blowby, should I put everything back together and do a compression test?


Also, I just took the turbo-downpipe gasket off and there is oil on the bottom part (where gravity would take it), and it obviously unburned. So maybe oil just drips out at idle and then burns when I step on the gas?
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Last edited by JUICEB0X; 12-06-2012 at 03:58 PM.
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Old 12-06-2012, 10:16 PM   #2
Cois32
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your worried just as much as i was when my motor was starting burning oil... i changed my turbo 3 times, had a compression/leakdown test done with good numbers, changed the pcv valve and my car still smoke intermitenly.
im pretty sure turbos can still burn oil with little to no shaft play
and valve seals can still cause a little smoking with good compression numbers lol
find out how quick your burning oil and start diagnosing.
change your pcv and if you want drop your headers and look for oil
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Old 12-07-2012, 01:17 AM   #3
JUICEB0X
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What would oil in the headers mean? It's not burning huge amounts of oil, not noticeable on the dipstick over the course of 1500 miles... It runs great, I just can't handle it smoking and for my own sanity, I need it to stop.
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Old 12-07-2012, 05:42 PM   #4
Cois32
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you can remove your intake/exhaust manifolds to see if oil is leaking past the valve seals.
but that would be one of the last things i would try

look for alot of oil in your intercooler and take off your turbo inlet and see if oil is collecting on the front side of your turbo.
if there is try and get a used turbo on here
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Old 12-12-2012, 02:08 AM   #5
SlverEJ20
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Yes the seals can go bad with no shaft play. My old turbo went bad around 100k and the smoke was so bad that I would turn my car off in traffic out of peer embarrassment. Pull your DP and look for oil in the turbo. If it looks like this, replace it
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Old 12-12-2012, 03:01 AM   #6
TwoFifty
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Might as well do a compression and leak down test. That'll at least give you a decent idea of the condition of the motor and possibly answer your oil burning question.
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Old 12-12-2012, 03:42 AM   #7
JUICEB0X
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Replaced the turbo and everything seems good. I had a 14mm nut leftover though. :/

I went through multiple times trying to figure out where the stupid thing went. My invidia Catless up pipe just has bolts, the flange is threaded. The down pipe has all of its nuts and bolts on it... The exhaust hanger nut is on there.


At any rate, I'm still going to do a compression test, and if that yields less than stellar results, a leak down will follow.
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Old 12-13-2012, 05:30 PM   #8
claythrow
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I hate mystery nuts.
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Old 12-13-2012, 05:31 PM   #9
claythrow
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Did it go to the up pipe connection on the hanger plate, sometimes people forget about it.
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Old 12-13-2012, 06:46 PM   #10
JUICEB0X
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What's a "hanger plate"? I tried to find it on google images, but I couldn't.
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Old 12-13-2012, 07:25 PM   #11
SlverEJ20
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what about the turbo to dp bolt that you cant see unless you are under the car?
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Old 12-13-2012, 08:12 PM   #12
JUICEB0X
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No, I got all those, and I have 3 bolts holding the turbo to the up pipe. The up pipe I have is threaded, so there's no need for a 14mm nut there...
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