Valve adjustment fail: tapping noise present now
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Thread: Valve adjustment fail: tapping noise present now

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    Senior Member docjekyll2002's Avatar
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    Valve adjustment fail: tapping noise present now

    Fail: Did my 1st valve adjustment. Had a mechanic do it last time. Both valves were out of spec by a little bit. Intake valve clearance was almost .001 so i backed it off to .003 like the specs said. I backed the exhuast valve to .005. Made sure the valves stayed put when wrenching the locking nuts on. Put all the covers, tank, fuel line, etc back on and now there's a tapping noise coming from the valves. And there's a tiny hole in the TDC view cap on the stator cover letting oil drip out because i had to gouge my screwdriver in cause the cap was seized up or overtightened by the last mechanic. Any suggestions? Also, if anyone would like to mail some spare TDC view caps or know of any ones not made of plastic, please let me know.IMG_3540.JPGIMG_3541.JPGIMG_3542.JPGIMG_3543.JPGIMG_3544.JPG

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    Senior Member docjekyll2002's Avatar
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    Senior Member docjekyll2002's Avatar
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  5. #4
    rbm
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    Are you sure you were on TDC when you made the adjustment?

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    Senior Member docjekyll2002's Avatar
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    I rotated the part in the middle of the stator cover until the 3 notches showed up in the top view hole. Not sure if the middle notch was supposed to line up with anything but I just left it when i could see all 3 notches and the 2 side ones were lined up with the hole/chamber.

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    Senior Member docjekyll2002's Avatar
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    The 2nd to last pic shows the middle notch. Is that how it's supposed to be?

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    Senior Member Zack's Avatar
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    I can't load your pics on a slow Internet connection here, but if I understand right, you used the rotor to find TDC? The thing you should look at when setting to TDC is the little vertical mark on the timing chain sprocket. That mark goes straight up. There is a mark on the cylinder head to line it up. You have to kind of look up from underneath a bit to see it sometimes. That cam chain sprocket rotates at half the speed of the crank shaft, so every two rotations of the crank will be one rotation of the cam chain sprocket. It is likely that you were one rotation out. If that is the case, it would make perfect sense that the valves are making noise now, because when you are a half rotation out, you will be at the top of the exhaust stroke. The cam lobes are lifting the rockers very slightly, and setting valve clearance at that position would make them far too loose when it came around to actual TDC.

    Zack
    Last edited by Zack; 06-11-2014 at 06:52 PM.
    Zack

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    Senior Member docjekyll2002's Avatar
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    Doh! Oh well, i think i can do everything again in under an hour

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    Senior Member indika666's Avatar
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    Quote Originally Posted by docjekyll2002 View Post
    Doh! Oh well, i think i can do everything again in under an hour
    1. Remove the spark plug

    2. Put a Pencil or something like that in the spark plug hole and make sure it moves with the piston

    3. Now try to align that TDC mark. Only make sure you get the TDC when the PENCIL is moving up (This makes sure you are in the Compression stroke)

    4. This way you will get the true TDC. otherwise you may end up with the BDC which is most probably your case.
    Adam-n-nevada and ZDR1 like this.
    2006 TW200E (JDM) -> 100% stock, Shinko SR428 front, Bridgestone TW204 rear, 14/45 stock gearing

  11. #10
    Senior Member Zack's Avatar
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    Good advice, but..... as long as the cam sprocket shows TDC, it will never be BDC, right? I wouldn't think there would be a need to risk breaking a pencil off in the spark plug hole. That piston can come up pretty fast if your not careful.

    Zack
    Last edited by Zack; 06-11-2014 at 05:13 PM.
    Zack

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