>> piston. The crankshaft and the cam reciprocate, but do not stop while >I'd say they rotate, not reciprocate. The rods sort of reciprocate, but the big ends never stop, per se >since the crank continues to rotate. Other candidates are the lifters and pushrods.
Mag points once every 90 degrees (open and close 4 times in 720). Rocker arms same as valves. Impulse couplings do not stop at normal engine speeds, only at cranking speeds. I'm sticking to my original story! John
<<attachment: winmail.dat>>
