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Replaced Valve Cams, now engine wont turn.

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  • Replaced Valve Cams, now engine wont turn.

    I was using this guide to replace my valve shims, as the motion pro tool did diddly squat for me.

    I lifted the cams, replaced the shims, replaced the cams and noticed that they weren't quite right, so after some fiddling I got the dots lined up with the arrows and started putting all of the nuts and washers and bolts back on.

    Went to rotate the gear, and about halfway around it completely jams and I feel a click.

    The chain tensioner wasn't installed, so I did that and it still doesn't turn. I looked up and notice that the cam gears are now unaligned, which is stressing me out further.

    Here are pictures, feel free to ask for more. http://imgur.com/a/wAgkC

    Could one of you tell me how bad I screwed up?
    80 LG

  • #2
    Originally posted by ff255away View Post
    I was using this guide to replace my valve shims, as the motion pro tool did diddly squat for me.

    I lifted the cams, replaced the shims, replaced the cams and noticed that they weren't quite right, so after some fiddling I got the dots lined up with the arrows and started putting all of the nuts and washers and bolts back on.

    Went to rotate the gear, and about halfway around it completely jams and I feel a click.

    The chain tensioner wasn't installed, so I did that and it still doesn't turn. I looked up and notice that the cam gears are now unaligned, which is stressing me out further.

    Here are pictures, feel free to ask for more. http://imgur.com/a/wAgkC

    Could one of you tell me how bad I screwed up?
    ...........forgetting to install chain tensioner WAS and IS your demise. Even a slow by-hand rotation likely bent at least one valve, from what I've seen on here by others creating a similar issue in the past.
    81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.

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    • #3
      Originally posted by motoman View Post
      ...........forgetting to install chain tensioner WAS and IS your demise. Even a slow by-hand rotation likely bent at least one valve, from what I've seen on here by others creating a similar issue in the past.
      Okay, so the center piece was in, but the piece in the front wasn't. I'm really hoping that I'm having a different problem. How would I go about fixing this?

      ::EDIT:: that was really vague. The stand that sits between the two gears up top was in its place. The tensioner by the exhaust was definitely sitting on the table next to me while I was manually turning the engine.
      Last edited by ff255away; 09-04-2013, 05:01 PM.
      80 LG

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      • #4
        You missed the part about "Do not, under any circumstances, rotate your engine without the cam chain tensioner installed or manually pushing on the adjuster bar."

        Pretty good chance that you bent valves, depending on how far you rotated it, but only way to tell now is to loosen the cams back up, take that center piece out, line the dots back up and the timing mark on the "T", re-install the tensioner (Or push on it with a finger inside the hole while spinning the crank clockwise) and check your valve clearances. If you find one (Or more) with a huge gap, then you've found the bent one(s). Hopefully you'll luck out.

        The clicking you heard was more than likely the crank gear jumping teeth on the timing chain. That center slider between the cams isn't anything needed for timing and such. Just make sure to stick it back in there before buttoning things up.
        Last edited by trbig; 09-04-2013, 05:55 PM.
        Try your hardest to be the kind of person your dog thinks you are.

        You can live to be 100, as long as you give up everything that would make you want to live to be 100!

        Current bikes:
        '06 Suzuki DR650
        *'82 XJ1100 with the 1179 kit. "Mad Maxim"
        '82 XJ1100 Completely stock fixer-upper
        '82 XJ1100 Bagger fixer-upper
        '82 XJ1100 Motor/frame and lots of boxes of parts
        '82 XJ1100 Parts bike
        '81 XS1100 Special
        '81 YZ250
        '80 XS850 Special
        '80 XR100
        *Crashed/Totalled, still own

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        • #5
          Thank you, trbig. I'll go back out and do that.
          80 LG

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          • #6
            I'm praying for you buddy. Hopefully you did not really turn your wrench hard when you felt things bunching up. I'm not sure I belt valves till I ran my bike.
            1979 XS1100F
            2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.

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            • #7
              Originally posted by ff255away View Post
              the motion pro tool did diddly squat for me
              That's a shame, if you got it to work this probably would have never happened.
              2H7 (79) owned since '89
              3H3 owned since '06

              "If it ain't broke, modify it"

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