Quote:
Originally Posted by Army
So with the rotation of the valves (due to either the rotators or an off centre lifter / cam configuration) a particular direction of movement is encouraged right?
If this direction of motion opposes the tightening of the lock nuts on a valve stem the clearance would tend to become looser with use right? And if the direction of valve rotation goes with the direction of tightening the lock nuts then the valve clearance would become tighter with use - right?
Does this sound possible or feasible?
I once heard a story of someone revving his motorcycle engine so hard that the valves got so tight the cylinders wouldn't hold any compression - myth, legend, BS - I don't know...
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Many motors if revved high enough will valve bounce. That is probably what your friend was talking about.
with regard to rotation direction. If the lock nut is tight it doesnt matter what way the valve rotates. I have no idea off hand the direction of rotation for a 617.
Then again you could blame it all on Coriolis forces & then it would depend if you were north or south of the equator!!  
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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles 
1987 250td 160k miles English import 
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