Comp cam lifter problems.......what lifters?

pishta said
There is crap in them. Lifters are simple pimple: there is a piston+pushrod seat, a little check ball/spring in a retainer and a larger spring at base. If you pop the little cage off the bottom of the plunger, youll see the tiny spring and the ball bearing. If you have a soft lifter sitting in oil and your pumping it with a pushrod, I guarantee you have some crap in the ball seat (or ball is not even seating due to tiny spring in retainer) as the tolerances of the pistons are pretty tight.
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Or the part tolerances are crap, or the materials in things like the spring are crap. I suspect the overseas manufacturers don't have the science and don't care about it as long as they can keep shipping them.
Same thing happens on non-OEM replacement strut tops; the rubber is very often the wrong hardness and so the tops move all over the place, plus the rubber quality is crap and won't last like OEM.