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Flywheel Bolts

Discussion in 'Early CJ5 and CJ6 Tech' started by FinoCJ, Jan 24, 2017.

  1. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    This may seem a bit trivial, but my question is really regarding lock washers. I am putting my flywheel back on (bolting to the crank output) and wondering if I should use lock washers? There were none when I took it off, but that doesn't really mean anything in terms of what it should be. I am guessing I can use a bit of loctite and torque them to the proper spec and it will all be good....but since I am a bit concerned about the quality of the bolt threads I intend to get new hardware - could probably run the old ones through a die and it would be fine - ran a tap through the engine/crank side. Any reason to (or not to) include lock washers when re-attaching?

    Along these lines - I've noticed that a lot of my jeep mounting bolts didn't have lock washers - such as the engine mount brackets to the block, bellhousing to block, pressure plate to flywheel etc. Of course my old CJ has probably been apart and back a number of times - so could have been a PO - or maybe Jeep just didn't use them in those days (or nobody really did). I have a tendency to add them especially if I am putting in new hardware and can account for any loss in thread depth.

    thanks
     
    FinoCJ, Jan 24, 2017
    #1
  2. Daryl

    Daryl Sponsor

    Internal tooth lock washers as well as medium loctite are both commonly used on flywheels and flexplates.
     
    Daryl, Jan 24, 2017
    #2
  3. PeteL

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

    PeteL, Jan 24, 2017
    #3
  4. tarry99

    tarry99 Member

    I believe everyone above is correct...........some bolts under the head do well with a star washer and others don't..............personally I would buy some ARP flywheel bolts and follow there instructions.
     
    tarry99, Jan 24, 2017
    #4
  5. Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member


    I've seen that argument put forth before & I don't buy into it- I've got lots of bolts with tooth marks on them let by supposedly squashed flat lock washers.

    H.
     
    Howard Eisenhauer, Jan 24, 2017
    #5
  6. FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Thanks guys- I decided to order a set and it looks like they come with external point lock washer - but sometimes pics are generic. What I took out looks to be a standard grade 8 hex bolt - no special head.
     
    FinoCJ, Jan 24, 2017
    #6
  7. Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    Just a thought, I broke a flywheel bolt putting on a flywheel, it was original, could have been stretched already? I got it out with a left handed drill. I don't think it was a hardened bolt. I put all new bolts in without washers, there was no washers on them when I took it off. I slowly pulled each bolt to specs, and let it go at that. Still don't know if I done it right.
     
    Rick Whitson, Jan 25, 2017
    #7
  8. 1960willyscj5

    1960willyscj5 Well-Known Member

    Torque 'em, and then safety wire them.
     
    1960willyscj5, Jan 26, 2017
    #8
  9. jeepcj

    jeepcj Member

    Just changed my clutch and resurfaced flywheel.. Bought new flywheel bolts and they had the washers, searched the web and seems most people install WITHOUT the washers. I left the washers out.
     
    jeepcj, Jan 26, 2017
    #9