[bnoon]

Yes it pushes against the piston. I have only ever used it to remove old junk pistons, but I've never cracked one either and believe me, these ones were STUCK! They sat for 13-14 years and barely came out of the bores! I couldnt even rotate the engine and thought the whole engine was stuck with spun bearings or something. Turns out the pistons were pretty much glued in place LOL!

To install floating pins, you heat the small end of the rod with LP or MAPP gas, then quickly push the pin through the rod and piston. You litterally have seconds to work with it before it cools too much that it can get stuck halfway on. Search youtube for videos on that part.