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Cylinder Head Gasket 225 Ci

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

  1. STEF 06

    STEF 06 New Member

    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
     
    STEF 06, May 26, 2020
    #1
  2. fhoehle

    fhoehle Sponsor

    I would have them both resurfaced in the event of a head gasket failure.
     
    fhoehle, May 26, 2020
    #2
  3. Keys5a

    Keys5a Sponsor

    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
     
    Keys5a, May 26, 2020
    #3
    timgr likes this.
  4. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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

    how to measure cuyl;inder head flatness - Bing video
     
    timgr, May 26, 2020
    #4
  5. STEF 06

    STEF 06 New Member

    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
     
    STEF 06, May 26, 2020
    #5
  6. Steve's 70-5

    Steve's 70-5 Active Member

    Have heads resurfaced. Have valve guides checked. Have the valves ground.
     
    Steve's 70-5, May 26, 2020
    #6
    mike starck likes this.
  7. jeepdaddy2000

    jeepdaddy2000 Active Member

    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.
     
    jeepdaddy2000, May 28, 2020
    #7
    mike starck likes this.
  8. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    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.
     
    timgr, May 28, 2020
    #8
  9. jpflat2a

    jpflat2a what's that noise?

    I'd have the head(s) checked and surfaced if necessary.
    That particular head has been off before; factory head gaskets were all metal.
     
    jpflat2a, May 28, 2020
    #9
  10. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    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.
     
    timgr, May 28, 2020
    #10