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1G Bad oil seal?

Posted by blujeans, Sep 15, 2019

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  1. blujeans

    blujeans Proven Member

    53
    3
    Joined Dec 15, 2018
    Calgary, AB, Canada
    Recently took my intake pipe off to check on how my turbo was doing after installing it about 1000 KM ago to find lots of oil pooled up in the turbo’s inlet, as well as lots of oil in my intake piping. Could it be a bad seal in the turbo or something else?
     

    Attached Files:

    57  4

    1988 Nissan 300ZX Turbo
    rwd · manual · Misc Vehicles

    Street Build 161  4

    1990 Eagle Talon TSi
    fwd · manual · 1G DSM

    153  1

    2011 Mazda 3 GT
    fwd · manual · Misc Vehicles
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  2. wrencher

    wrencher Proven Member

    360
    40
    Joined Nov 20, 2005
    Chicago, Illinois
    More likely it from the crankcase vent tube from the valve cover.

    Your valve cover feed into the inlet like stock?

    This is why many run PCV check valves & catch cans.
     
    BLACK'98DSM likes this.
  3. blujeans

    blujeans Proven Member

    53
    3
    Joined Dec 15, 2018
    Calgary, AB, Canada
    I run a catch can between the valve cover and the intake pipe yes. I don't have a check valve however
     

    57  4

    1988 Nissan 300ZX Turbo
    rwd · manual · Misc Vehicles

    Street Build 161  4

    1990 Eagle Talon TSi
    fwd · manual · 1G DSM

    153  1

    2011 Mazda 3 GT
    fwd · manual · Misc Vehicles
    Loading...
  4. Boomdeeze

    Boomdeeze Proven Member

    2,076
    303
    Joined Jul 5, 2009
    Independence, Minnesota
    You don't want a check valve between the valve cover and the intake pipe, you only want one between the valve cover and intake manifold so you don't boost your crank case. You want the valve cover "vent" tube to be able to let crank case pressure out during boost but also fresh air in to the crank case when your PCV valve is drawing air during vacuum(idle/cruise) situations.

    What kind of catch can do you run? Is it an empty can or an actual oil separator?
     

    Street Build 5K  1

    1997 Mitsubishi Eclipse GSX
    10.793 @ 128.98 · 2G DSM
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  5. blujeans

    blujeans Proven Member

    53
    3
    Joined Dec 15, 2018
    Calgary, AB, Canada
    I just use an empty one from RTM racing
     

    57  4

    1988 Nissan 300ZX Turbo
    rwd · manual · Misc Vehicles

    Street Build 161  4

    1990 Eagle Talon TSi
    fwd · manual · 1G DSM

    153  1

    2011 Mazda 3 GT
    fwd · manual · Misc Vehicles
    Loading...
  6. Bo0sTeD 4G63

    Bo0sTeD 4G63 Proven Member

    436
    69
    Joined Aug 31, 2008
    Miami, Florida
    Check the turbo for shaft play, I had the same problem and when I rebuilt it had bad seals. Also check for oil on the exhaust side of the turbo by where the bolts hold the housing. Look for any oil stains or burnt oil in that area.
     

    Street Build 1K  1

    1997 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
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