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Rebuilt Engine, Head Leaking

Discussion in 'Early CJ5 and CJ6 Tech' started by aekdbbop, May 19, 2021.

  1. May 19, 2021
    aekdbbop

    aekdbbop Member

    TN
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    Jul 31, 2014
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    I have a rebuilt engine, F134, that I got back from them machine shop. After the first start up or two I noticed coolant weeping from the head. I took the rocker cover off and re-torqued the head to 70ftlbs. After running again for a few minutes the weeping comes back. Any suggestions before I pulled his head off again?
    here’s a picture:
    1-C339261-39-BA-4810-ACB1-5-EB9727-A565-F
     
  2. May 19, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Did you assemble it or the shop?
     
  3. May 19, 2021
    aekdbbop

    aekdbbop Member

    TN
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    The shop
     
  4. May 19, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Did you tell them it leaks? Any reason why you can't take the whole Jeep back to the shop?
     
  5. May 19, 2021
    aekdbbop

    aekdbbop Member

    TN
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    just noticed this evening.
     
  6. May 19, 2021
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Personally I wouldn't do anything else till you tell them about it. They should be responsible for any repair since they assembled it.
     
    Jrobz23 and Twin2 like this.
  7. May 20, 2021
    aekdbbop

    aekdbbop Member

    TN
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    I should mention that it is doing this in several spots around the head.. not just that one
     
  8. May 20, 2021
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Discuss it with the shop before you do anything more than you have already done. You don't want to be accused of causing the issue or, making it worse.
    A reputable shop should stand behind their work.
     
  9. Jun 13, 2021
    aekdbbop

    aekdbbop Member

    TN
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    We’ll a little update. They had me take the head off and bring it back to them. They milled it (they couldn’t remember if they did it the first time) and cleaned it up. Brought it home and put a new head gasket on. Made sure to torque down to 70#. Started right up. I let it heat up, then removed everything to retourque while it was till hot.

    and it’s still leaking. I’m at a loss and very defeated.

    what should I do at this point? Try a bottle solution? Torque down more?

    it’s a very slow drip, but it’s there.

    Ugh.
     
  10. Jun 13, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Did they deck the block????

    They "can't remember?" Do they remember if they billed you for it???

    The shop built the engine, it leaks, but they want you to do all the labor and travel to correct this? I call BS.


    Once I had a shop mess up a job. They said they'd 'fix' the damage they did. I told them, no, I would get it repaired some place I trusted, and send them the bill, and that's what I did.
     
  11. Jun 13, 2021
    aekdbbop

    aekdbbop Member

    TN
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    Not sure if this shows if it was decked or not.. This was what the block looked like before I put the head gasket on after they milled the head.
     

    Attached Files:

  12. Jun 13, 2021
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Is the engine number still readable, just in front of the #1 hole? Decking will remove that, unless it was re-stamped.
     
  13. Jun 13, 2021
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    The deck looks very clean, but can't tell from your photo if the deck was surfaced. Looking at the photo, is the leak at the front of the block? That shows some discoloration.
    I would not use any stop-leak type product. What brand head gasket have you been using?
    If a shop rebuilt/assembled the engine, it should be on them to make it right. Show them your photos and see what they say.
    -Donny
     
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  14. Jun 14, 2021
    Arnold Layne

    Arnold Layne Member

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    Between the black crud in the combustion chamber area and the grade stamps near each cylinder on the distributor side, I'm saying it has not been decked. Maybe get a quality straight edge on the deck and see if it's flat or not. But yeah, it probably should be the machine shop's baby.
     
  15. Jun 14, 2021
    aekdbbop

    aekdbbop Member

    TN
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    It was a felpro gasket. Both times.
     
  16. Jun 15, 2021
    aekdbbop

    aekdbbop Member

    TN
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    Well, they are having me bring it to them, running in the jeep... have to flat tow it most the way before I drive it the rest to let it heat up.. it sounds like they want to make it right. I just have a feeling that means I have to take this damn engine out again.. ha
     
  17. Jun 15, 2021
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    Was there any sealant used on the head bolt threads?
     
  18. Jun 15, 2021
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    My comment isn't worth much be here it is.
    I've always been in the group that much prefers to run just water in a brand new engine.
    Break that engine in and run it with just water.
    Some shops will even tell you to do this as part of the break in process.
    Are you driving the Jeep or just letting it sit, idle, and come up to temp ?
     
  19. Jun 15, 2021
    CHUGALUG

    CHUGALUG Member

    Silverton, OR
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    MY vote is the Studs (should not use bolts unless trying to be military correct) were not properly sealed.
     
  20. Jun 15, 2021
    aekdbbop

    aekdbbop Member

    TN
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    Yeah I think I am going to replace the bolts with studs and goop the threads better and replace the gasket one more time before I rip the engine out..

    Does anyone offer a stud kit for the f134?
     
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