Hello is there anyway to test a hydraulic lifter after removing it from car
ummm... make sure it's straight and not worn down. You're gonna have to provide a bit more context.
If you push on the plunger and feel strong resistance, it's probably OK. If not, it'll compress like a worn out shock absorber. Why are you testing a hydraulic lifter? If you even think it's bad, replace it. Just make sure to soak the new ones in a container of oil overnight before installing it. What vehicle, year, engine, mileage???
It’s a 2001 Pontiac grand am gt with about 160000 miles and I am having trouble with zero compression in cylinder 3 after a cylinder head replacement with new valves
It sounds like the valves for number three are sticking open. Do the other cylinders have normal compression? Reason I ask is that normally even a collapsed lifter will allow some valve movement. Could the lifters be stuck in their bores? Are the rocker arms properly aligned and functioning. Could the valves be stuck in their guides after the guides were knurled and reamed, maybe to the wrong diameter? Lots of possibilities here. No compression means both valves are open or your piston rings are totally shot, but even then, you'd have some compression.