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Quote:

hi
the cam lobes are ground with a taper that the lifter face is always presssig cam rearward, this angle also causs the lifter to rotate !

roller cams have no taper and need a button !



Correct answer... If you use a roller cam you need a thrust button, otherwise the lobe taper takes care of thrust... But a thrust button won't hurt anything & many high performance builds run one...

Okay, so if the cam is always being pulled toward the rear of the block, then what keeps the cam gear from running into the block?

Sorry for the ignorance, just trying to understand.