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Cylinder Head Gasket 225 Ci

Discussion in 'Early CJ5 and CJ6 Tech' started by STEF 06, May 26, 2020.

  1. May 26, 2020
    STEF 06

    STEF 06 New Member

    FRANCE
    Joined:
    Nov 2, 2019
    Messages:
    2
    Hello, I am changing my cylinder head gasket because one was broken in the cylinder 4 and 6, I wanted to know if you have your cylinder heads rectified when you do this, my 2 cylinder heads are very clean I have no marks on the joint plans, thank you
     
  2. May 26, 2020
    fhoehle

    fhoehle Sponsor

    Harford Township, PA
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    Apr 11, 2012
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    I would have them both resurfaced in the event of a head gasket failure.
     
  3. May 26, 2020
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    Jan 23, 2014
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    2,634
    An accurate straight-edge and feeler gauges can determine if heads are warped enough to need resurfacing.
    Heads don't neccessarily need to be resurfaced for a head gasket repair. A severe overheat causing the head gasket failure usually will require the machine work.
    -Donny
     
    timgr likes this.
  4. May 26, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    +1. Measure the flatness. There is a specification in the manual.

    how to measure cuyl;inder head flatness - Bing video
     
  5. May 26, 2020
    STEF 06

    STEF 06 New Member

    FRANCE
    Joined:
    Nov 2, 2019
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    2
    I'm going to have the cylinder heads checked, the engine hasn't heated up, no smoke, in fact I realized because I had a blast in the passenger side exhaust and overconsumption of petrol, otherwise the jeep still worked well with the 4 cylinders :) culasse cj5.JPG
     
  6. May 26, 2020
    Steve's 70-5

    Steve's 70-5 Member 2020 Sponsor

    Louisville, Ky
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    Nov 12, 2009
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    Have heads resurfaced. Have valve guides checked. Have the valves ground.
     
    mike starck likes this.
  7. May 28, 2020
    jeepdaddy2000

    jeepdaddy2000 Member

    Eagle Point oregon
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    Jun 24, 2004
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    408
    X2. This is, unfortunately, one of those "while I have it off" times. Be prepared to spend money, as most heads wind up needing more than a valve grind.
     
    mike starck likes this.
  8. May 28, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    JMO - you don't need to surface unless the heads are warped. Measure. In my experience, shops will routinely recommend surface, needed or not. V6s heads are so short they are very unlikely to be warped. You need to check flatness though. Measure. Check flatness of the block deck too; both sides affect sealing.
     
  9. May 28, 2020
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
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    8,023
    I'd have the head(s) checked and surfaced if necessary.
    That particular head has been off before; factory head gaskets were all metal.
     
  10. May 28, 2020
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    Just a comment - if your shop measures the head flatness and tells you that the heads do not need to be surfaced, they are honest to a fault. There is no up side for them not to recommend surfacing the head, and a clear down side. I have many times taken in customer's heads for evaluation, and the shop always recommended surfacing. Checking the head flatness yourself is easy - see the YouTube videos I linked.
     

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