this pully has to be replaced.. to take it off you will need a puller not only is this a pully it is the crankcase vibration damper.. if you hold a mirror and flash light you will see three threded holes around the middle of this.. first you have to take the large bolt out.. after that a puller has to be connected to the three holes.. and a a threded screw is now inserted into the center of the puller.. tighten the threded screw and the unit will come off.. you might have to remofe the radiator first.. drain the anti freeze and store it in 2liter soda botles.. remove the hoses and belts.. and then you will have room to do as i describe.. this pully has the timing marks on it also. you have to buy a new one.. try a junk yard and you have to remove it.. or go to an engine rebuilder they may have one.. proper name is vibration damper.. ok gilermo when you reinstall this .. it has a key way.. put some greese around the color where the keyway is start it by hand.. then use a piece of wood like a one foot piece of two by four.and tap it on with a hammer.. only hiting on the wood ok..
