actually i already asked about how to do this. you can also just rent a gear puller. the gasket set was like $11 at a local parts store. getting the old gasket out wasnt too bad either, just took a little ingenuity and a screw driver.
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you'll need a mallet or a block of wood and a dead blow hammer to pound the pulley back in, just sticking it in and bolting it in will not be a good idea as it will not seat the seal properly,
it makes it a lot easier to have everything in front of the engine out of the way, and radiator pushed up, but not neccessarily removed, just so you can get a good swing at the pulley. getting it off... well have fun with that one, worst case scenario you can crank the engine to loosen the bolt