Comp cam warranty

PRH said
One of my regular customers, who uses quite a few SFT cams was checking for lifter rotation on a 505 he’s putting together.
One lifter wasn’t turning at all.
Swapped lifters with one that was turning, no difference.
So...... it’s either the cam or the block.
Pulled the cam out, measured the lobe taper...... same as the others.
The choices at that point are....... bush the block, or roller cam.

Had it not been checked for lifter rotation...... it would have failed.

I usually check for lifter rotation very early in the cam installation process........ but I check the lobe taper before even sliding the cam into the block.

Lifter not turning is my guess as well.

In the post I linked early, there was an inspection that found the camshaft "grind" was not as wide as the casting, which caused basically a sharp edge that could easily "eat" a lifter if not addressed. I never thought of checking that in the past, but I definitely will check it on my next flat tappet camshaft. I definitely learned something reading that one.