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Startup Procedure For Newly Rebuilt 225?

Discussion in 'Early CJ5 and CJ6 Tech' started by Chuckman, Oct 12, 2019.

  1. Oct 12, 2019
    Chuckman

    Chuckman New Member

    Joined:
    Jan 4, 2011
    Messages:
    43
    is there a definitive procedure for the startup of a 225 after a fresh rebuild? bought this motor in a basket, and theres ZERO to start from. carb rebuilt, motor rebuilt, converted to HEI etc. so theres many variables to consider.

    break in oil etc.
     
  2. Oct 12, 2019
    cj6/442

    cj6/442 Sponsor

    Fallbrook, Calif
    Joined:
    Feb 6, 2008
    Messages:
    2,734
    I just broke in a freshly rebuilt 225 , I spun the oil pump first to build pressure and get oil to the top end , then installed the distributor. I filled it with delo 400 15w30.and used a zinc additive also .started it up I was close with the timing and once started I turn hei to get it to run clean and spun the motor a 2000rpm for 15 min , keep an eye on temp, pressure and water leaks .
     
  3. Oct 12, 2019
    wheelie

    wheelie beeg dummy 2024 Sponsor 2023 Sponsor

    York, PA
    Joined:
    Mar 6, 2004
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    4,491
    I was always told to run straight water in the cooling system during initial start up of a fresh engine. Something about, if there is a coolant leak into the oiling system (like a head gasket problem?), the straight water is less likely than anti freeze, to lead to damage of the bearings. Might be hocus-pocus. Just what I was told. Maybe a pro can confirm or deny this info.
     
  4. Oct 13, 2019
    Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Virginia Beach, VA
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    Apr 28, 2011
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    225 pack oil pump with petroleum jelly (vaseline)
     
  5. Oct 14, 2019
    53A1

    53A1 Member

    Kern Co. Ca.
    Joined:
    Jun 17, 2008
    Messages:
    447
    ^^
    Good advise. Assuming you put in a new cam and lifters, Melling cams actually recommends Delo and I would take the above advice and add an additional bottle of Lucas with ZDDP. Drive it around for 20 min after cam break-in to break in the rings under load then dump the oil. I would stick with the Delo for the life of the vehicle but don't want to start another oil debate.
     
    Last edited: Oct 14, 2019
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