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  1. #1
    Member
    Join Date
    Apr 2004
    Location
    So. Cal.
    Posts
    18
    Corvette(s)
    '08 coupe, Z51, 3LT, NPP

    Default coolant leak on ls3

    My water pump is leaking on my '08 LS3. Looks like it's coming out of the fitting on the top of the pump that the upper radiator hose attaches to. Can that fitting be replaced or does the entire pump need replacing? If so, is the fitting press fitted? I'm trying to avoid the hassle of taking it to the dealer. The 2 dealers around me have lousy service depts. I know from personal experience.

    Also, when I removed the throttle body to get a better look at where the leak is, I noticed the inside of the intake manifold has a thin layer of oil on the entire inside surface. Is that normal?
    '08 coupe, 3LT, Z51, NPP

  2. #2
    - Online
    Technical Writer for Internet & Print Media
    Join Date
    Jan 2001
    Location
    Southern California
    Posts
    6,515
    Corvette(s)
    71 95 04 12

    Default

    I'd keep looking for a dealer you like, that way you get it fixed under warranty.

    I thin layer of oil inside the intake is normal.

  3. #3
    Member
    Join Date
    Apr 2004
    Location
    So. Cal.
    Posts
    18
    Corvette(s)
    '08 coupe, Z51, 3LT, NPP

    Default

    I'll have to go to the dealer. Maybe they can just replace the fitting. There doesn't seem to be any leaking out of the pump itself and it makes no noise when in use.

  4. #4
    Member
    Join Date
    Sep 2006
    Location
    Carlsbad,Ca.
    Posts
    872
    Corvette(s)
    2006 C6Z DSOM

    Default

    An "oil catch can" can eliminate the unnecessary internal intake lubrication.

  5. #5
    Member
    Join Date
    Apr 2009
    Location
    Orlando,FL
    Posts
    31
    Corvette(s)
    '10 ZR1, '05 GTO W/7.5L LSX

    Default

    I know what fitting your describing. That fitting can be reseated. Not a biggie

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