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Buell Forum » XBoard » Archive through June 15, 2015 » Xb12 cam , lifter , valve question ? « Previous Next »

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04mx
Posted on Sunday, April 05, 2015 - 09:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I removed the cam gear cover and 2 cams came out with it .....now when I put things back in ,it seems like something is jacked up is this normal ?
I took the rocker box off ,put the cams in there proper place but when I tighten the rocker box the valve is depressed slightly even if the lifters are on the base circle
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Greg_e
Posted on Sunday, April 05, 2015 - 09:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

They are hydraulic lifters so they always have some pressure against the cams. This is why you need to remove rocker boxes before pulling the can cover, else you might damage the engine side bearing on each can.
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04mx
Posted on Sunday, April 05, 2015 - 03:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ya I'm new to buell so I learn as I go.

thing is the rear cylinder (cams didn't pull out ) I could turn the cam gears by hand while they were on the base circle, and after removing the cam (to phase timing )and putting it back in I can't turn it by hand anymore it is putting pressure on the valve . will they bleed down after time ?

thanks
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Sifo
Posted on Sunday, April 05, 2015 - 05:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Is it just one valve, or both valves? IIRC, the push rods are not the same length for the intake and exhaust. If you mixed them up, then one will be tight, and the other will be loose.
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04mx
Posted on Sunday, April 05, 2015 - 06:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the ones that came out ,when I put them back in are jacked as if the lifter piston moved up inside the lifter .

should I try to let it sit for a while with the rocker box tightened to see if they bleed off after some time?
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Poppinsexz
Posted on Tuesday, April 07, 2015 - 06:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

As sifo said the pushrods are different lengths.
You probably have them in backwards
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04mx
Posted on Wednesday, April 08, 2015 - 08:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Can't be backwards I didn't even take them out.2 cams fell out removing the cover and now its like the lifters are longer(pumped up )
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