how to pressurize a cylinder??

[jlmillionaire]

Hey all,I have a question.I need to know the name of the tool to pressurize the cylinder,i'm doing head work so i need to take the springs and retainers out and put them back in can anybody help me out please?its basically the tool you hook up a compressor to like a modified spark plug or something like that:confused:

[DRIFTING_SIL_EIGHTY]

Cylinder leak down tester. You should be able to rent it at your local automotive parts store.

[jlmillionaire]

aight good look i actually thought it was that