GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 6 of 6
  1. #1
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,612

    Default Best guess-oil leak near cam cover/oil pan-after replacement

    I need a best guess here.
    About 3 weeks ago I paid a part time mechanic to change the intake manifold gaskets on my 98 suburban.Also replaced the timing cover and oil pan gasket.

    I just noticed a decent oil leak-maybe 3/4 quart in 200 miles. It looks like it is coming from where the timing cover meets the oil pan.

    How likely is this to be the case?

    Why would it leak-with a new gasket-in other words what did he do wrong-so I don't rtepeat it.He was in a hurry toward the end- he was a fast-too fast worker?
    Kinked gasket?
    Didn't clean surfaces well enough?
    Torqued screws too tightly?
    Is it more likely to be the oil pan gasket- or-I hope not-the timing cover-which is a new GM cover.
    The screws and two nuts don't seem loose- tightened tham slightly- no help.
    Thanks
    Charlie
    PS It was an autozone FEL PRO OIL PAN GASKET.
    PPS- It will be 100 degrees today!!
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  2. #2

    Default

    Charlie,

    This is quite common. The rubber seal between the pan and timing cover leaks because it gets moved out of position when the pan is installed. The good news is the timing cover can be removed without removing the oil pan so it's not that big of a deal. Make sure to use silicone at both ends of the rubber gasket during installation.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3

    Default

    like jimmiee said sounds like that seal moved

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  4. #4
    Legend

    Join Date
    Jun 2006
    Location
    River Ridge Louisiana-4 miles W of New Orleans-didn't flood-water stopped 800 yards away.
    Posts
    1,612

    Default

    Jimmie,Z71_GUY

    Thanks for the quick response.
    I'm a bit unclear. Is the oil pan gasket leaking-seal moved a bit to the outside - or that built in timing cover seal-which is sorta integral to the timing cover.

    I'm hoping it is just the oil pan seal, since to get to the timing cover I have to pull the harmonic balance , the fan and the pulleys.

    I don't have a special harmonic balance puller-large part of the reason I had this guy do the work.

    So is it the oil pan gasket or the timing cover gasket??Just best guess of course,

    I know that the oil pan gasket seals between the timing cover and the oil pan and the engine-.

    Thanks
    Charlie
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

  5. #5

    Default

    ok, what you need to do is to jack the front, get under, bring along a can of choke cleaner, as it works very well for this, and remove all and any oil residue from anywhere around timing cover all the way around the oil pan gasket in question.
    wipe it totally clean.
    drive for 2 days.
    jack again and check it out.
    1. if you have MAIN SEAL leaking, it'll show itself. awfully close to where you describe the leak.
    2. if it's the pan gasket, then clean it again, wipe out dry, clean again, wipe out dry, then use some degreaser to make it super dry and clean.
    put a ton of red silicone along the pan gasket perimeter and let it harden.
    i have fixed my OEM gasket like this.
    but you must determine is it's main seal or pan gasket.
    NEVER EVER USE CORK GASKETS ON ANYTHING!! POS
    DON'T FIX IT IF IT AIN'T BROK. IF IT'S BROK - FIX RIGHT AWAY.
    WONNA THINGS DONE RIGHT, DO THEM YOURSELF

    2000 SILVERADO, CENTURION EDITION, 4WD, Z71, 5.3 VORTEC
    NO DUMM MODS

  6. #6
    Legend 2ToNe04's Avatar
    Join Date
    Apr 2009
    Location
    Fresno California
    Posts
    1,030
    Blog Entries
    1

    Default

    didnt align the gaskets well enough.

    2004 4.8| Custom Paint| Tint| De-badged| Shaved Tailgate| Rollpan| Smoked Tails| Color Matched| Lowered 5/8| Suede Interior| Color Matched Interior| Indash & TVs| Mids-Lows & 2 12" CVRs| 500 & 1100 Interfires| Soundeadener| Outlaw CAI| Magnaflow|
    Future Mods: 6.0 LQ4/9| Bags|

Similar Threads

  1. Oil Leak Above Valve Cover (Driver Side)
    By Tank00 in forum GM Powertrain
    Replies: 0
    Last Post: 11-02-2009, 08:46 PM
  2. Replacement emblem and wheel cover [Expired Topic]
    By mwalker in forum Chevy Equinox Forum (GMC Terrain)
    Replies: 1
    Last Post: 10-25-2009, 03:08 PM
  3. Oil leak-front oil pan+ cracked timing cover
    By phoebeisis in forum General Chevy & GM Tech Questions
    Replies: 0
    Last Post: 07-11-2009, 05:12 PM
  4. It's about time I guess
    By ShelbyTS661 in forum Member Introductions
    Replies: 9
    Last Post: 05-07-2009, 10:43 PM
  5. well i guess i should say Hi...
    By Akula682 in forum Member Introductions
    Replies: 10
    Last Post: 11-06-2008, 06:50 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •