Bottom of lifter worn thru

inkjunkie said
Excuse the hi-jack......suppose someone has a motor with a flat tappet cam that has been sitting for a while.....it was a driver for a while. I realize that the break in of cam/lifters is done but what should be done other than yank the dist. and spin the pump up to get oil every where again? Should a zinc additive be used just as a safeguard?

Threads like this convince me that a roller cam will be used when I get around to my motor some decade....
Click to expand...

I agree with DarTT. Even though the cam/lifters are "broke-in", it would be wise to lube it because the lobes and lifters can actually be dry, or almost, after all that time. Even with priming the oil pump, the cam will rotate several times before enough oil is pressure fed, spit out from between all the parts and splashed onto the cam to lubricate it. It just takes a split second of dry friction to start terminal wear.