Checking Hydraulic Lifters.

[AZ3.8Camaro]

Hey guys, for anyone who has messed with our lifters I have a question.

I went out to my garage to check my old lifters to see if they were bad (they made noise). They have been out of the car for a year now, so they are bled out, but oily.

I stuck a pushrod in them and none of them move at all. I don't know how much force it takes, but they won't compress. I took the retainer clips off of a few of them and found that some of them will compress and then re-rise when I take the pushrod off. Others wont move at all. Same situation occurs when I fill them with oil.

Which is good and which is bad?
Why won't some of them move at all?
Thanks.

[jmihalchik]

best way to check them is take them out soak them in oil overnight, then use a vise they should compress easily if not they are no good.