valve shims

[john 4d]

Just a quick note. I've just measured all my carefully segregated valve shims prior to rebuilding the cylinder heads.

One shimhas a recess on one side, roughly the same diameter as a valve stem. Can I assume that something has gone awry here?

[Andrew S]

imported post

Hi John

This is where the valve stem has been wearing the shim. I would just replace it the other way up when refitting

Andrew

[john 4d]

imported post

I had thought of doing that although I would expect the consensus would be to replace the worn shim with new. My query is, though, the other 15 show no sign of wear?

[V Mad]

imported post

This shim must have been from a different batch which were not hardened properly.

[john 4d]

imported post

H'mmm! Possible, if not probable. Chances are that after re-seating the valves I will need to replace certain shims anyway, I'll just have to make sure that one is left out of the equation when shuffling the existing shims first.

Thanks