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Thread: Best Dmax replacement water pump

  1. #1
    Join Date
    Dec 2000
    Location
    Hawaii/Arizona
    Posts
    259

    Default Best Dmax replacement water pump

    My water pump just started to leak and I will be buying a replacement pump tomorrow. I remember several years ago there was a DP discussion about what the best replacement pump was for a Dmax. I did a search and could not find the old discussion. My truck is a 2006, LBZ and I am leaning toward buying a GM pump from the stealer. Has anyone found a good replacement pump other than a GM pump? Additionally, what is the price for a new pump these days. Does anyone have suggestions to make changing the pump go smoothly.
    Thanks
    John
    *2006 Chevy, 3500, 4X4, DRW, (LBZ) D/A, CC, LT, 252K Miles, 19.5" Wheels, Mag Hytec Transmission Pan and Differential Cover, SS Grill Guard, Racor 2 micron aux fuel filter, 100 Gallon Aux Fuel Tank, using Edge Evolution, Predator Diablosport, Kennedy ECM tune, Fitch Fuel Catalyst.

    *2006 Four Winds, Dutchman, 36', RV, D/A, 5500 Kodiak.
    *1993 Harley Davidson, Turbo charged, Springer Softail.
    *2007 Pontiac Solstice.
    *2005 Jeep, Liberty, CRD (diesel).
    *Full-timing in USA, see America first.

    BUY AMERICAN or CANADIAN, NOTHING from CHINA .

  2. #2
    Join Date
    Dec 2002
    Location
    Teton Valley, Idaho
    Posts
    1,873

    Default

    I have only my own experience to tell:

    The GM pump lasted 6 months before the impeller spun on the shaft - or rather, the shaft spun as driven by the engine but the impeller was no longer being spun. It was replaced for free by the warranty (12 month/12,000 miles) and the new GM pump rests in my shed as a backup to the NAPA pump (lifetime warranty, considerably less cost) that I replaced the spun one with. That was over 2 years ago.

  3. #3
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    At one point we were selling LB7 and LLY water pumps with welded hub for the HP applications only. The pump that rapidoxidationman had fail was a GM/AC Delco pump from us. Since his application was not a race one it was not welded. We now weld the impeller and the gear to the shaft on all pumps to eliminate press fit issues.

    The LBZ water pump has a composite impeller and seems to be pretty much safe from the impeller spinning issues.
    Last edited by Kennedy; 07-28-2014 at 12:27.
    Kennedy Diesel-owner
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