[davepl]

MRTurner, you have sort of the right idea on valve lash, but remember oil is NOT compressible, it's not a "soft landing" for the lifter, nor a buffer. When the lifter goes down into the bore and the bleed hole is covered, that lifter is as hard and solid as a mechanical steel unit.

That's how I understand it, anyway. So if they're set too tight, it's not like the hydraulics "absorb" it, it'll still wipe the cam once overset.