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Thread: Need help identifying where oil is coming from

  1. #1
    Join Date
    Jul 2008
    Location
    Lansing ,MI
    Posts
    254

    Default Need help identifying where oil is coming from

    Hello all,

    Truck is a 2007 LBZ. 61K miles. The first picture is of the turbo inlet, looks like an oil residue is forming on top of the boot and connection. Is this normal? I know that if oil is forming on top of the boot that the same oil residue is going into the turbo, which isnt cool.

    Next is my bigger concern. It is the pipe that goes from the turbo to the air to air in front of the radiator. There is quite a bit of oil on top of it, (as seen in the picture). It looks like the connection right above the pipe might be dripping down onto the pipe. Im not positive what it is though, maybe a tranny line? Thanks guys.


    On another note, can I remove the fan guard (not the shroud) and leave it off in case I loose the serp belt along side the road, so I dont have to take it off then? It looks like it would make changing the belt a PITA.
    Attached Images Attached Images
    1991 Chevrolet Silverado 3500, 6.2L. 125,000 miles -Sold

    2007 Chevrolet Silverado LBZ - R.I.P

    2001 Chevrolet Silverado LB7-- Sold

    2011 GMC Sierra, LML- 39,000 miles. All stock

  2. #2

    Default

    Normal, normal and normal.

    Do you run an EGR blockoff plate or any other mods?
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  3. #3
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    Some oil residue in the intake plumbing is normal. It's a result of the closed circuit crankcase vent (PCV).

    The 3rd pic looks like a power steering line leak. This is not uncommon, and doesn't pose an immediate problem, unless it's significant or causing other issues (like dripping onto exhaust components). Degrease it and watch for the source.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  4. #4
    Join Date
    Jul 2008
    Location
    Lansing ,MI
    Posts
    254

    Default

    Thanks for both of your replies. I will clean off and watch for more leakage. And Mark, no I am not running a blocker plate, I am eventually going to send my ECM in to John and have the basic tune done so my egr will be shut off completely. I figured this is a better route to go rather than just a blocker.
    1991 Chevrolet Silverado 3500, 6.2L. 125,000 miles -Sold

    2007 Chevrolet Silverado LBZ - R.I.P

    2001 Chevrolet Silverado LB7-- Sold

    2011 GMC Sierra, LML- 39,000 miles. All stock

  5. #5
    Join Date
    Jun 2007
    Location
    oxford me
    Posts
    162

    Default

    i also want to know can the fan gaurd be removed cause it does make changing the belt a pita
    #1 01 dmax xcab 251000 miles and climbing
    #2 06 dmax crew cab 66000 miles 2009 polaris dragon 800sp 89 suzuki 500 quadracer

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