Lets talk Roller Cam Lifters.

Ok next question.

Why do you have to block off the lube to a mechanical roller lifter. They have to make mechanical lifter that feed oil up thru the push rod tube to feed mag/chev tip rocker arm.

So why is this tubing or sleeving required on a mechanical Roller lifter. and for that matter why is it not required for mechanical Flat Tappet lifter?