Put the air line to it but sure and not be standing where the cups will pop and hit you in the head!! Then drive the second one out the end of which it goes in on.
I don't like driving them all the way through because the pits and rust usually show up in the middle of the cylinder where the rubber cups never slide. If you drive one of them all the way through it may pick up some rust from the center of the bore and cut a nice groove in the cylinder wall as it goes through.
Others may have a better way??
