Rotator Valves

[blown49]

Originally Posted by Russ/40

Hmmmmm, now what does that tell us about the springs causing rotation? Tells me that's not happening. I guess it's also telling us the follower won't turn the valves.
Have we answered all our questions, or I guess, my misconceptions

Guess I'll chime in here with and observation. I bought a single mushroom valve, split valve guide, spring and lower retainer/lock along with a '49-'50 valve, valve guide, spring, lower spring retainer, and locks. I also bought a '51-53 valve, valve guide, spring, lower spring retainer, bell shaped retainer and locks from Mac VP last year. I think some of the parts came from Joblot.

I noticed after assembling the '51 thru '53 assembly that when I take it back apart the bell shaped retainer (rotator??) is stuck to the locks and must be tapped loose to remove the locks. That sorta tells me the rotation occurs between the bell retainer and the lower spring retainer.

Along similar lines some of the valves have an annular ring around the valve stem, under the head which for lack of of a better term I'll call a "bump stop" for this discussion. I have an old used mushroom valve with a bump stop and the new one from Mac does not have one. The '49-'50 I bought doesn't have one but the '51-'53 does. I called Joblot and ordered a '51-'53 valve that doesn't have one. Did all the original valves have bump stops?

TIA
Jim