i have a ticking valve.i have hydraulic roller cam.my heads have screw in studs.i tighten the rocker arm ,the ticking goes away for about 3 seconds and it starts ticking again.it comes back gradually getting louder.i tighten it again...same thing.if i had press in studs i would say stud pulling out of head.however this is not the case.im thinking it must be a lifter problem.these lifters have less than 500 miles on them.anyone have any ideas.

 

You Have a bad cam

 

lol.its a brand new cam.less than 500 miles

 

if it was flat tappet, i'd say it's a bad cam. I doubt it, since it's a roller.

Only one valve ever does this? I'd inspect the valvetrain very carefully... Loose rocker, retainer, lock, etc ? Something should be visable. A bad lifter could do it, but everytime anyone has mentioned "collapsed lifter" on this board, it's never actually turned out to be the case.

 

Still sounds like a bad cam to me have you driven it or let it run it could be just some gunk got into the lifter and not allowing it to pump back up

but i still think its the cam

 

i swapped lifter...problem solved