Originally Posted by
gale
If you can isolate which cylinder(s) it is with a stick held up to your ear, take the cover off again, take a close look at the tip of the valve stem & maybe take the eccentric off & make sure the stem isn't cupped or the eccentric has any flat spots. Next time I adjust mine, I'm going to replace all the eccentrics and pinch bolts. It might be a bit of overkill but they've been adjusted so many times I'm afraid one of these days I'm going to snap off one of the pinch bolts when tightening it & I did remove a couple eccentrics last time & examined them under magnification & could see that there was a slight sharp corner at the end of the worn patch & the virgin portion just beyond where it rubs, & could be responsible for some ticking when swivelled to a new position when adjusting them. Not much you can do for a cupped or pitted valve stem short of a valve job. Also could be a noisy injector, try the stick trick with them too.
Also, even tho .013" is better for smoother idle, right now I have mine set at a tight .012 & next time I'm going to set them at .011, it seems to have a bit more power & smoother at upper rpm's with a tighter setting & I'm willing to sacrifice idle for that. Rarely do we hear of an m30 with a burned valve so I'm not worried about running them tight.