Any tips for reinstalling cams?
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Any tips for reinstalling cams?

This is a discussion on Any tips for reinstalling cams? within the Engine forums, part of the Yamaha Wolverine Gen 1 708 cc SxS category; I'm having one hell of a time getting the cam sprockets under the timing chain on re-assembly. Any tips for getting them reinstalled? Thanks....

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Thread: Any tips for reinstalling cams?

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    Any tips for reinstalling cams?

    I'm having one hell of a time getting the cam sprockets under the timing chain on re-assembly. Any tips for getting them reinstalled? Thanks.
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    Evil Kenevil noload's Avatar
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    Have you removed the tensioner?
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    Yup. I replaced the piston, rings and cylinder with the update kit from the TSB. Bolted back up and stuck at getting the cams under the chain. I have the intake side installed, small pita, but the exhaust side just can't seem to get it worked over.
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    Silver Bullet kdt1970's Avatar
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    How did you get the cams out in the first place? you may just need to reverse those steps.
    Do you have a Factory Service Manual?
    Last edited by kdt1970; 06-22-2020 at 01:28 PM.
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    I have not torn mine down yet but from the manual, here is what I assess... you have run ahead and bolted the cam cap on without the chain being installed on both cams. The manual gives you a step by step with the little alignment holes in cam sprockets in the correct positions AFTER you have set TDC of the crank. You probably released the top cam cap while the chain was on and you need to reverse that process but with the crank and cams in correct locations and chain installed before torquing down the cam cap. When the crank is at TDC and cams are in firing position with the little holes up. There will not be any preload of the cam pad buttons so if you feel resistance, then something is not aligned properly or the pads are too thick under one or more of the cams. If that occurs and you suspect it the cam pad clearance put some strips of notebook paper between the cam and the pad and then put some pressure on cam cap and pull the paper, if there's pressure the paper will tear. After bolting down the cam cap be sure to check your valve clearance, and write them down in case you need to calculate and order new pads to get clearance correct.
    Last edited by jimclemjr; 06-22-2020 at 11:18 PM.
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    Quote Originally Posted by kdt1970 View Post
    How did you get the cams out in the first place? you may just need to reverse those steps.
    Do you have a Factory Service Manual?
    Apparently not correctly! Damn things! Lol!
    2019 Camo R-Spec EPS
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    3 1/2 " Highlifter Lift
    Warn 3500 Provantage Winch with wireless remote
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    2016 Camo R-Spec EPS
    Stock Steel Rims
    Mudlite II
    2" Perfex Lift
    Warn #3500 Pro Vantage Winch with wireless remote
    Yamaha Folding Windshield
    Yamaha Rear Curtain
    Hunterworks H.O. Fan

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    Quote Originally Posted by jimclemjr View Post
    I have not torn mine down yet but from the manual, here is what I assess... you have run ahead and bolted the cam cap on without the chain being installed on both cams. The manual gives you a step by step with the little alignment holes in cam sprockets in the correct positions AFTER you have set TDC of the crank. You probably released the top cam cap while the chain was on and you need to reverse that process but with the crank and cams in correct locations and chain installed before torquing down the cam cap. When the crank is at TDC and cams are in firing position with the little holes up. There will not be any preload of the cam pad buttons so if you feel resistance, then something is not aligned properly or the pads are too thick under one or more of the cams. If that occurs and you suspect it the cam pad clearance put some strips of notebook paper between the cam and the pad and then put some pressure on cam cap and pull the paper, if there's pressure the paper will tear. After bolting down the cam cap be sure to check your valve clearance, and write them down in case you need to calculate and order new pads to get clearance correct.
    I followed the manual, mostly....The hiccup comes in for me trying to see the Magneto mark and lining it up to TDC, reading "Counterclockwise" and translating that into "Clockwise" in my head as I'm juggling the timing chain and the inspection camera and rotating the crank. I finally get the mag mark lined up and and start with the intake cam. I get it in, then the exhaust cam. NoGo! Just can't get it to go. Fight, fuss, Cuss, avoided the throwing of wrenches across the garage and decided to take a break.

    Reset to today. Lined up the Mag mark with the screwhole mark by rotating Counterclockwise Check. Fiddle with cams a couple times, went with exhaust side first. Got it in. Intake side, struggling. Lightbulb moment! Looking down onto the head, exhaust cam in left hand, cam chain in right. Rotate camgear so the opposite end of the camshaft is at 10 o'clock is and raised up 20 degrees or so with the chain over the top of the cam gear . At the same time rotate the cam gear to the left, guide the cam bearing race into the Journal in the head, and push the tail to the 12 o'clock. there is a stepped cut away in the head for the cam gear to rotate into when you start it. Same with intake side, except start at 2, not 10. Then there's the whole into and out of to get the dots lined up. Easy Peasy.

    Thanks for the replies folks!
    Last edited by Tracen8r; 06-23-2020 at 07:08 PM.
    2019 Camo R-Spec EPS
    ITP Steel Rims
    Evolution Tires
    3 1/2 " Highlifter Lift
    Warn 3500 Provantage Winch with wireless remote
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    Yamaha Rear Curtain

    2016 Camo R-Spec EPS
    Stock Steel Rims
    Mudlite II
    2" Perfex Lift
    Warn #3500 Pro Vantage Winch with wireless remote
    Yamaha Folding Windshield
    Yamaha Rear Curtain
    Hunterworks H.O. Fan

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