You do not want to change from a roller camshaft to a hydraulic flat tappet cam! that would be adding friction to you engine(bad plan). you can go from a flat tappet to a roller cam but no one offers a kit to erase technology, or subtract horsepower.
Take a pushrod and push down on the plunger in the lifter. A hydraulic lifter is spring loaded.
hydraulic lifter? Rocker arm?
Stuck hydraulic lifter.
There's no need to they will prime themselves when the engine starts.
I guess that you are talking about a hydraulic lifter for an auto engine. There is no repair for these. They can be converted to "solid" lifters or used as paper weights.
That is the hydraulic lifter
16 The 1998 is an 8 cylinder engine. Each cylinder has two lifters. One lifter is for the intake and one lifter is for the exhaust.
There is no need to. When you fire the engine up they will be primed.
Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
Collapsed hydraulic lifter? - try a quart of mystery oil
Depending on the vehicle, it most likely needs adjustment.
Oh yes!!! There were two engine options for the 1970 Chevelle SS454. The LS5 was a mild, hydraulic lifter engine rated at 360 HP. The LS6 was a solid lifter fire breather rated at 450 HP.