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  1. #1

    Default 2001 Suburban 6L engine oil leak

    I need some advice with the newest one, Moby, a real white whale (K96 frame so it sits really high in back.) 150K miles - 2001 3/4T 4wd. Leaks oil from engine maybe oil cooler lines? There is oil on line at radiator and drips near rear of engine. Do rear main seals leak at this mileage?


  2. #2
    stephan's Avatar
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    Sep 2010
    Far West, Oregon USA,
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    Yes Paso they leak oil @ 150k miles and usually a whole lot sooner than that. Try cleaning the oil off at your leaks and then run it a while and verify that it is originating there for sure, before you start repairs. Oil can creep, blow, & flow a long way from its origin and you could be decieved. I had a leak once that I thought was a rear main seal but turned out to be the rear of the intake manifold.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

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