i recently had a pushrod snap, luckily i found both pieces and not much damage was done to the engine, other than the gear on the distributor. but im testing the hydraulic lifters to make sure they will push down. i put the hydraulic lifter on the ground and put force down onto it with the pushrod. but to no avail.. i can't get any of them to move. am i suppose to be able to move them myself? something tells me it requires the force of an engine to move them.. but i need expert advice here. thanks.