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2G Turbo oil leak

Posted by RentonRager, Aug 19, 2019

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  1. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    So I got into a little bit of an accident a while ago and now I'm kinda confused I've repaired and replaced all body parts I needed. I've replaced the radiator and all the hoses so I know it's not spraying on the motor anymore but I keep smelling and seeing it leak oil.
    Originally when I bought the car it didn't leak oil at all but there was some blowout through the exhaust which is common (I was told). The motor only has about 10k on the rebuild and the turbo is only about 5k.
    There's a ding on the oil return line but I just don't see this much oil spraying from bad seals or a crack on the return line.
    Its leaking all over the exhaust as well
    I'm posting pictures of the underside with it. Topside is dry
    This is my first dsm but not my first high performance problem any help would be nice. I'm going to order a oil return line and gaskets but if you think it's turbo seals lmk
     

    Attached Files:

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  2. 95_gsx_2g

    95_gsx_2g Supporting VIP

    93
    15
    Joined Apr 26, 2010
    washington, Pennsylvania
    You should definitely check that turbo for shaft play to see if it's going bad. If your running a bit rich and got some fumes coming out the exhaust under a pull that's one thing but you shouldn't be blowing oil out. The return line is definitely looking like a potential leak and it can run down in other areas so just keep at them till you find them all. Fp (what I use) and rtm sell some nice return lines for the dsm platform!
     

    Street Build 4K  21

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
    Loading...
  3. ThunderChild

    ThunderChild Supporting VIP

    2,541
    713
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Looks like seals to me, but it's everywhere so it's kind hard to tell. I'd pull it and the manifold to check for oil residue.

    Does it smoke at all?
     

    Street Build 234  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    322  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 873  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  4. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    I'll check for play in the morning. to answer the smoke it only happens on a pull, never at idle. Some hydro carbons come out on start up but only if you hold white paper up to the exhaust and leave it there a while will you get carbon marks.
     

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  5. ThunderChild

    ThunderChild Supporting VIP

    2,541
    713
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Sounds like bad seals to me. Check for play and inspect the turbo, I bet you'll find play and/or oil all over the inside of the housings coming from the chra.

    What's you're pcv setup like?
     

    Street Build 234  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    322  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 873  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  6. Boomdeeze

    Boomdeeze Proven Member

    1,627
    270
    Joined Jul 5, 2009
    Independence, Minnesota
    I second the turbo seals if it smoking during a pull. Is your PCV setup correctly?

    Also be careful with the RTV on the drain fittings. It looks like a lot of RTV was used and you want to be careful that it does not start to block the drain. Journal bearing turbos push a lot of volume in to the CHRA so that oil needs to go somewhere. All that is needed is a thin layer on the gasket, clean/dry surfaces, assemble to about 70% tightness, let dry and then torque all the way down.
     

    Street Build 4K  1

    1997 Mitsubishi Eclipse GSX
    10.793 @ 128.98 · 2G DSM
    Loading...
    Mello likes this.
  7. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    The pcv is still set up without being ported for crank case pressure but goes through a sh**ty catch can. which is why I get some oil going to the exhaust.
     

    Attached Files:

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  8. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    Update* checked turbo and no play with no oil, so the smoke is coming from the pcv dumping into the exhaust.
     

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  9. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    Here's the turbo
     

    Attached Files:

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  10. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    Thanks for the help my buddy installed that before I got it so I was wondering how to install once I got the parts.
    What do you suggest doing to the pcv system? Getting the port without the ball and adding a check valve between the oil catch? Or what
     

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  11. Boomdeeze

    Boomdeeze Proven Member

    1,627
    270
    Joined Jul 5, 2009
    Independence, Minnesota
    Get a can that actually separates the air and oil, that can appears to be the open style can which does next to nothing. It also looks like there is no check valve between the intake manifold and catch can which means you are pressurizing the can. If the PCV is leaking (which I bet it is) you are pressuring the crank case and no wonder you’re pushing oil passed the seals.

    Here is the can I run between my PCV and intake manifold, ordered it off Amazon but same can:

    https://www.jegs.com/i/Moroso/710/8...JzFRRP0Fss8oWI-v4X43rP3nDLHnwk9xoCln8QAvD_BwE

    I added a little scotch bright pad in the filter area to help pull the oil out of the air but likely wasn’t needed. Use this between the intake and can:

    https://www.usplastic.com/catalog/i...rRdDWL9t3m9k1RPo7hDTeKu75My4oraRoCMRQQAvD_BwE

    I would get that PCV situation fixed and redo that oil drain, start there and we can assess after. If you’re really feeling spunky, get a catch can for that valve cover breather too!
     

    Street Build 4K  1

    1997 Mitsubishi Eclipse GSX
    10.793 @ 128.98 · 2G DSM
    Loading...
    ThunderChild likes this.
  12. Boomdeeze

    Boomdeeze Proven Member

    1,627
    270
    Joined Jul 5, 2009
    Independence, Minnesota
    The PCV doesn’t dump in to the exhaust, you’re either pushing oil in to your intake manifold or pressurizing the crank case which pushed oil passed the seals and in to the exhaust housing. Read above reply for my suggestion.
     

    Street Build 4K  1

    1997 Mitsubishi Eclipse GSX
    10.793 @ 128.98 · 2G DSM
    Loading...
  13. ThunderChild

    ThunderChild Supporting VIP

    2,541
    713
    Joined Jan 5, 2012
    Rathdrum, Idaho
    Just looking in the inlet isn't going to do jack for you. It's good that it doesn't have play, but you need to remove at least the O2 housing and see if there's a crap load of oil in there, which I bet there is.

    Also, any oil being pushed bast the compressor side seal wouldn't be visible from the inlet, since everything is pulled in past that point. If you took the compressor housing off, I bet you'll find oil there too.

    As @Boomdeeze said, you're most likely pressurizing the crankcase, causing oil to push past the seals.

    Take the j-pipe and/or O2 housing off and look for oil, and dont be surprised when you find it. Then get a proper catch can setup with check valves and report back.
     

    Street Build 234  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    322  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 873  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 1K  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  14. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    So I ordered a proper catch can and check valve to get rid of the old one that's not working, do I need to drill the ball out of the pcv or leave it alone?
     

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  15. RentonRager

    RentonRager Probationary Member

    9
    0
    Joined Aug 19, 2019
    Renton, Washington
    Update: got a new return line on it and a different catch can so far no leaks but I still have oil underneath my front mount piping... No clue where it could be coming from.
     

    Attached Files:

    Street Build 130  1

    1996 Eagle Talon TSi AWD
    276 whp · 308 lb/ft · 2G DSM
    Loading...
  16. Mello

    Mello Proven Member

    944
    232
    Joined Jul 4, 2003
    Albuquerque, New Mexico
    What's that big oil drop on the turbine housing v-band. This makes me think your turbo is leaking oil at the turbine wheel. Pull the turbo or at minimum the o2 housing & see if the turbine wheel is oil soaked.
     

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