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Casting Number Mystery

Discussion in 'Early CJ5 and CJ6 Tech' started by perreaultjy, Jan 19, 2021.

  1. Jan 19, 2021
    perreaultjy

    perreaultjy New Member

    Quebec Canada
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    Dec 12, 2008
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    The engine head on my Dauntless has 2 water port one in very front and one at the very back however the intake manifold has only 2 water port one in each side at the front. To me that does not make any sense.

    Engine casting no 1375162, head 1376348 the intake manifold B 1376398 E.

    I cannot find any litterature to confirm that these 3 components were designed to work together .

    Where could I find the engine number ?
     
  2. Jan 19, 2021
    Twin2

    Twin2 not him 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Virginia Beach, VA
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    sounds correct to me
    intake only has water passage crossover in front
    rear right port on intake usually for temperate sending unit . but some guys run a heater hose there too
    borrowed picture from fireball post
    [​IMG]
     
    Fireball likes this.
  3. Jan 19, 2021
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    cordele, Ga.
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    If you think about it for a minute, the heads are designed to work on either side. The water hole on the left front will be at the rear when switched to the other side.
     
  4. Jan 19, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    I thought there was an oil return issue if the heads weren't on a certain side. :shrug:
     
  5. Jan 19, 2021
    timsresort

    timsresort Member 2022 Sponsor 2021 Sponsor

    South Lake Tahoe CA
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    The heads are identical, maybe with the exception of front accessory bosses drilled and tapped. It is weird to see the left rear water port not go anywhere into the intake, but that is part of making them interchangeable.
     
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  6. Jan 19, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Maybe I'm thinking of a different engine, but I remember a conversation about heads and oil return issues if they weren't on the proper side.
     
  7. Jan 20, 2021
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    cordele, Ga.
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    The heads for my 225 have the same casting number and are original to my engine.
     
  8. Jan 20, 2021
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    The heads can swap but the rocker shaft assembly has to be put on the right way to lube rockers and pushrods. The oiling hole for the rocker shafts are drilled on both ends of the head but only line up on the oil port on the front end of the block. There is no oiling hole on the rear of the block. When you pull the rockers off you can stick a wire thru the hole and it lines up with a hole in the front cam bearing.
     
    Glenn likes this.
  9. Jan 20, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Maybe that's what I recall...I know I read something about oil or oiling.
     
  10. Jan 25, 2021
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    You may also be remembering a post about the ports on a head being blocked to allow more oil to collect. It's a performance mod and I have it on one of my engines and I know another ran into the same thing a while back. Those heads have to be put back on the same side to allow the oil to push up correctly.
     
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