Originally Posted By Cab_Burge
Valve float, when the lifter doesn't stay on the top of the cam lobe at max lift at max RPM is one thing, hydraulic lifters pumping up causing the valves to stay open on the heel of the cam in another issue also. shruggy
Which problem are you trying to deal with work

shruggy

GOOD QUESTION beer

But I understand the sky will be GREEN tomorrow, I've actually read some articles that say it always has been stirthepot We were just taught that it was blue.
So back to the OP's valve float question. Wing it in neutral until makes noise and stops.
Repeat the process SEVERAL times with the IDENTICAL Motor under laboratory conditions with various temperatures, humidity levels, Ambient as well as engine temps, and report back. Do not forget with or without proper crankcase venting, oil viscosity, grade of hill, rear end gears, transmission ratio, UHH and phase of the moon due to it's gravitational pull on my septic tank and valve train. With all of that data collected We will then be able to continue to comment on the silly question.

OPPS forgot one variable, What type of valve covers ??
HMM, original, reproduction, aluminum (cast, billet, or sheetmetal)

What is the surrounding temperature ?? IE: under hood, Dyno room, Maybe no hood ??

octane of fuel??

I come here to relax, enjoy and try to help. Some of the suggestions responses make me question why I continue to do so twocents