23-06-2021, 10:05 PM
(This post was last modified: 23-06-2021, 10:10 PM by peter scott.)
(23-06-2021, 08:52 PM)Murphyv310 Wrote: That sounds right to me.
I've stripped many engines over the years like you.
The only ones I ever came across with a safety circlip on the valves was my Skodas namely 1969 1000mb, 1972 S100, allegedly they stopped the circlip in 1976. Never had a failure though.
I must admit that it sounds more credible than my initial suggestion but I'm surprised that a wide tappet clearance would cause the valve stem to fracture. After all it's not being subjected to any significant side forces. It's just being hammered longitudinally but not any harder than under normal operation. Rolls Royce say that they found the lock nut in the oil well adjacent to the camshaft drive at the rear end of the block. Was the slack lock nut just a convenient scapegoat to hide a manufacturing issue with the valve stems? Was the lock nut actually lose at all?
Peter
