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225 main bearing oil groove

Discussion in 'Early CJ5 and CJ6 Tech' started by Number7, Dec 10, 2011.

  1. Dec 10, 2011
    Number7

    Number7 New Member

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    Nov 3, 2007
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    14
    Should any of the main bearings for a '71 225 have only a partial oil groove?

    My main bearing set(Clevite MS-960P) has one bearing with only a partial oil groove in the upper bearing. The other bearings all have a groove the full length of the upper bearing half.

    See pics to show the one that has only the partial groove and another one for comparison that has the full length oil groove.

    [​IMG]

    [​IMG]

    Is this right?

    And if so, which journal does the partially grooved bearing go in?

    I searched for other possible threads and did find one that asked the same question but was never fully answered.
    http://www.earlycj5.com/forums/showthread.php?16725

    Thanks,
     
    Number7, Dec 10, 2011
    #1
  2. Dec 10, 2011
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    The partial oil relief bearing goes in the rearmost journal.
     
    Patrick, Dec 10, 2011
    #2
  3. Dec 11, 2011
    Jeepenstein

    Jeepenstein Me like Jeep.. 2024 Sponsor

    North Central FL
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    Any Idea why? I can't for the life of me imagne why you would have a partial releif?


    BUBBA
     
    Jeepenstein, Dec 11, 2011
    #3
  4. Dec 11, 2011
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Not sure. IIRC the FSM doesn't cover it, but every 225 I've taken down has had them, at the rear main.
     
    Patrick, Dec 11, 2011
    #4
  5. Dec 11, 2011
    Number7

    Number7 New Member

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    If that's the case, and I'm not disputing what you say Patrick, why wouldn't it show in the FSM? I don't have an FSM yet but the other manuals I've looked at don't mention the odd bearing at all.

    I did find a picture on Summit's website that does show the set and it does show the partially grooved bearing. So I guess the bearing is OK. I'm just confused as to why there's no mention of it in the manuals.

    http://www.summitracing.com/parts/CLE-MS960P/?rtype=10

    Thanks again
     
    Number7, Dec 11, 2011
    #5
  6. Dec 11, 2011
    wsknettl

    wsknettl cuz

    NW Wisconsin
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    The SM-1046 does mention the grooves go up and it does mention that the rear main is different. It just does not expound on the difference.
     
    wsknettl, Dec 11, 2011
    #6
  7. Dec 11, 2011
    Dandy

    Dandy Member 2024 Sponsor

    Estherville IA
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    I didn't see anything in my fsm or two old motors manuals.
     
    Dandy, Dec 11, 2011
    #7
  8. Dec 11, 2011
    Number7

    Number7 New Member

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    OK, then. If that's the way they go, then that's the way they go. I wish it was more specific in the books, but it is what it is. I'll start getting this thing back together in the next few days.

    Thanks for the info.
     
    Number7, Dec 11, 2011
    #8
  9. Dec 12, 2011
    wsknettl

    wsknettl cuz

    NW Wisconsin
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    My Buick 231 shop manual says the rear groove does not go all the way around the top half shell.
     
    wsknettl, Dec 12, 2011
    #9
  10. Dec 12, 2011
    Number7

    Number7 New Member

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    Wes,

    Thanks. That's one more confirmation that what I have must be right
     
    Number7, Dec 12, 2011
    #10
  11. Dec 12, 2011
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Mine says the same.
    My Jeep fsm just says it's different but doesnt say what position it should be in. In this case I'd defer to Patrick as he has recent extensive experience with the 225. Lots of changes happened between the 225 and even fire 231
     
    nickmil, Dec 12, 2011
    #11
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