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Dauntless Timing Chain

Discussion in 'Early CJ5 and CJ6 Tech' started by alpina72, Mar 26, 2023.

  1. Mar 26, 2023
    alpina72

    alpina72 Member

    Georgia
    Joined:
    Mar 1, 2015
    Messages:
    180
    Since I broke 2 1/2 bolts while swapping out my waterpump, I'm going to pull my timing cover and inspect/ replace the chain and gears.
    Since it's and oddfire engine, is there anything "odd" I should be watching out for?
    Or is it all pretty straightforward?
     
  2. Mar 26, 2023
    Ollie2009

    Ollie2009 Member

    Ann Arbor, MI
    Joined:
    Jun 16, 2022
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    86
    It has some "odd" chain tensioners. The hard part is getting the dizzy out. Mine was corroded to the cover. Added some pictures.(y)

    [​IMG]

    [​IMG]


    [​IMG]
     
    Last edited: Mar 27, 2023
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  3. Mar 26, 2023
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
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    Feb 5, 2006
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    Change the front seal while you are in there. Use a good harmonic balancer/installer. Seal the crankshaft to the balancer with a little sealant before putting the bolt/washer back on.
    Mark your distributor before pulling and try not to turn your crank while working on it. Set on TDC before pulling anything to have a reference. Check your fuel pump eccentric or
    cam lobe for wear. Use blue loctite on cam bolt. Remove crankshaft bolt first. It may require the use of an impact wrench and radiator removal. Do this before pulling the distributor and lining up your marks on the damper and distributor.
     
    Last edited: Mar 26, 2023
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  4. Mar 26, 2023
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    12,529
    I like the Cloyes double row roller timing chains. They work well. I do not like the Edelbrock timing sets. I had a set stretching under 40,000 miles on an even fire engine. If you decide to go double row you can eliminate the tensioners which do wear out so another thing to look at if you decide to go with a stock style timing set.
    What Vtxtasy said above. The stock front seal is a rope type that uses a metal ring retainer in the timing cover that is staked in place. Remove the retainer and carefully file/remove the staking then replace it all with a quality neoprene seal. Don’t be surprised if you need to use a repair sleeve on the balancer seal surface. While the balancer is off use some white modeling paint or similar on the timing mark groove in the balancer. It makes life much easier later.
     
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  5. Mar 26, 2023
    alpina72

    alpina72 Member

    Georgia
    Joined:
    Mar 1, 2015
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    180
    So I'm looking at the chain and gears.
    All looks to be in good shape.
    On the slack side of the chain though it seems the slack seems to be a little excessive.
    I'm not seeing anything in my service manual as to how much slack there should be.
    No apparent wear/grooves on the tensioners.
    The Jeep is a 1970 but best I can figure the motor is a 1966.
    Had a 1988 license plate on it when I got it and I see rebuild plugs on the heads. So it may have been gone through at some point.

    The oil pump concerns me more than the timing chain as it is pretty noisy when spinning by hand.
     
  6. Mar 26, 2023
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
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    12,529
    What is excessive? Pretty much any slack is too much since you are dealing with not only ignition timing but valve timing. Did you ever have a timing light o it to see if the balancer mark jumped around? If so then too much variation.
     
  7. Mar 26, 2023
    alpina72

    alpina72 Member

    Georgia
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    Mar 1, 2015
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    180
    I was thinking there should be some slack on one side.
    My timing light is kind of screwy.
    have been planning on getting a new one when the Jeep is back together.
    Has good compression and ran good before I pulled the tub.

    It really didn't need a waterpump to begin with haha
     
  8. Mar 29, 2023
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    Jan 23, 2014
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    4,170
    A quality chain and gear set will have very little chain slack when new.
    -Donny
     
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  9. Mar 29, 2023
    OzFin

    OzFin Vintage Jeep Guy

    Michigan
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    Jul 16, 2007
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    940
    You will not be any closer than you are now, go ahead and replace it. Half the battle is getting to it and you are already there.
     
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  10. Mar 29, 2023
    alpina72

    alpina72 Member

    Georgia
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    Mar 1, 2015
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    I decided to replace it.
    Bought the Cloyes set.
    I'm also going to rebuild the oil pump.

    My question now is, can I replace the rope seal on the cover with a regular seal.
    Rock Auto has Victor Reinz sets with either option.
     
    OzFin likes this.
  11. Mar 30, 2023
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
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    Yes, replace the seal with a modern one.
     
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  12. Apr 24, 2023
    Fresbone

    Fresbone Member 2023 Sponsor 2022 Sponsor

    Fresno, California
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    On the Cloyes web site, they list two double row roller timing chains (9-3127-5 and 9-3127). Both are for I-6 232, 242, or 258 engines. Do those work with a V-6 225 or am I looking the wrong direction? When you use a double row chain, is there plenty of room inside the stock cover?
     
  13. Apr 24, 2023
    vtxtasy

    vtxtasy oldbee 2024 Sponsor 2023 Sponsor

    Tucson, AZ
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    Cloyes and fits various V8's:
    https://www.cloyes.com/part-finder-single/?partno=9-1132&part_type=Street TRUE® 3 Keyway .250 TRUE® Roller Chain&pl=High Performance&lookup=applicationhp&appmake=BUICK&appengine=V-6 198, 225, 231
    Summit, but does not say for the V6:
    https://www.summitracing.com/search/part-type/timing-chain-and-gear-sets?fr=part-type&SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=Cloyes 9-1132
    Amazon says it does not fit fit: Bull
    https://www.amazon.com/Cloyes-9-1132-Street-True-Roller/dp/B000NGPZW4/ref=sr_1_1_mod_primary_new?keywords=Cloyes+9-1132&link_code=qs&qid=1682316858&sbo=RZvfv//HxDF+O5021pAnSA==&sourceid=Mozilla-search&sr=1-1&vehicle=1967-42-344-20--30---15104----3551--4&vehicleName=1967+Jeep+CJ5
    Cloyes stock:
    https://www.cloyes.com/part-finder-...8&appmake=Jeep&appmodel=CJ5&appengine=V6 3.7L

    If it fits it fits all. The double roller gives the option of plus or minus 4 degrees with three keyways.
     
    Last edited: Apr 24, 2023
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  14. Apr 24, 2023
    53A1

    53A1 Member

    Kern Co. Ca.
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    Jun 17, 2008
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    I'd do everything while in there. There's a procedure for checking the oil pump gear to case clearance. Easy to do and only requires feeler gauge as I recall. If you had 20 psi at idle you're probably ok anyhow. Be VERY picky, clean and careful with the surface prep for the new gasket. You have coolant and oil passages very close to each other. Not saying you have to, but I would pull the intake and check the cam and lifters while I'm in there. They dish then wear our pretty quick after that.
     
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