pauls1150
MOA #24991, south of Los Angeles
Interesting... Next time you're in there, loosen up the valve a bunch and inspect the pushrod: maybe one end has come off the rod; the newer style of pushrod cures this. Downside is the head has to come off to swap it out, and you can't inspect the bottom ("inner") end while in place. Picture below is from another thread, from either GSAddict or Anton (sorry guys, I forget).
Another possibility is that the threads in the head have stripped. These are NOT like the airheads: the heads are re-torqued after the initial service, but unless some head work has been done, they don't normally require re-torquing again.
Another possibility is that the threads in the head have stripped. These are NOT like the airheads: the heads are re-torqued after the initial service, but unless some head work has been done, they don't normally require re-torquing again.
