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Thread: 6.2 Coolant System Engine BLock Drains

  1. #1
    Join Date
    Jan 2006
    Location
    Marietta, GA
    Posts
    8

    Default 6.2 Coolant System Engine BLock Drains

    I have an 86 Chevy Beauville with a 6.2, and VanDiesel is one of my all-time favorite vehicles, EXCEPT for the engine block coolant drain plugs, which are behind the engine mounts. I badly need to clean and flush the cooling system, and that flush requires draining the block. Does anyone have a suggestion/method for a flush?

    Thanks!

  2. #2
    Join Date
    Sep 2001
    Location
    Lubbock TX, USA
    Posts
    4,194

    Default

    You could remove the block heater on one side, and knock a freeze plug out of the other. No, not a good way to do this really.

    Really doing the radiator is a large chunk of the coolant, flushing this is a big help, I wouldn't bother with the block personally.

    J
    1982 C10 SCSWB 6.5TD, mods too extensive to list. (13.69 1/4 mile @94.6 MPH) RACE TRUCK
    1982 C10 SCSWB 6.2NA, 2.73 700
    1986 C10 SCLWB 6.2TD 3.73 700
    1989 V20 SUB 6.2NA, 3.73 400
    1994 G20 VAN 6.5NA, 3.42 60E
    1994 K20LD ECSWB 6.5TD, 3.42 80E
    1995 K20 SUB 6.5TD, Wrecked, ran into by stupid teen.
    1995 C3500HD DRW 6.5TD, 12' Flatbed 5.13 80E
    1995 C3500HD DRW 6.5TD, 18' Rollback Wrecker 4.63 80E
    1994 C20HD ECLWB 6.5TD 3.73 80E Wifes Truck.
    1995 C20LD ECSWB 6.5TD 3.73 80E
    1995 K20LD SCLWB 6.5TD 3.73 80E
    1996 K30 DRW 6.5TD 4.10 80E
    1997 C10 Tahoe 2Door 2WD 5.7L to 6.5 Conversion Underway

  3. #3
    Join Date
    Jan 2006
    Location
    Marietta, GA
    Posts
    8

    Default Re: Coolant system flush

    Thanks, John. I might just end up doing the radiator only --- that would be much better that no attention at all. And I've looked at the freeze plugs as a possible alternate, but I always come back to, "They didn't really design it that way, did they??" As an engineer, this sort of lunacy hurts!

    Perhaps there is a brass street 90 elbow with 3/8 MPT one side and flare fitting outlet, that I could install between the block and the engine mount. If I find one, I'll let you know!

    Ross

  4. #4

    Default

    just stick a garden hose in the water pump and let it run for a while, this is what i do to flush the coolant from the block


    EDIT: maybe i should say let the water run for a while and the truck off

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