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Thread: LMM Headgasket

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  1. #1
    Join Date
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Exclamation LMM Headgasket

    I just replaced a set of head gaskets on an '08 LMM the other day. UGG! I don't want to have to relive that one anytime soon! I did the repair because of coolant consumption AND an over pressurized cooling system. Anyone else out there with an LMM having any slow coolant loss issues?
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  2. #2

    Default

    How did you do the gasket swap? Pull fenders/cab off engine, or pull engine out of truck?
    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
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Talking

    GM Service Information says to remove the engine from the truck for the repair. I had no interest in that!! On the flip side, I don't have the ability to pull the cab up off of the frame, so I did the job in the vehicle. I didn't even pull the turbocharger. It still took way too long to do the job, but I had no left-over parts and I wasn't shy any either.
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  4. #4

    Default

    You must have skinny, nimble hands.
    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

  5. #5
    Join Date
    Feb 2000
    Location
    Montana
    Posts
    11,382

  6. #6
    Join Date
    Jan 2007
    Posts
    299

    Default

    Thankfully that is one problem I do not have... Sounds like you had a lot of fun Duramaster!
    2007 Silverado, 3500HD, 4X4, CC, Long Bed, SRW, LMM Diesel, Navi, DVD, Roll-N-Lock Cover, ICI Running Boards, CoastalEtech GM Lockpick for DVD/Nav changes in Motion, Back-up Camera...

    2006.5 VW Jetta Special Edition TDI - Blue Graphite - European Spec VW Fact. Nav Radio.

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