This was very easy to install, it took 10 minutes, if you have a cover over your pulley just pop a hole in the middle and pry it off, then using a 17mm hex socket attached to a impact gun just loosen it going left, but don't just pull trigger and keep going, do the trigger pulls quickly on and off like 3 times and it will be good, then you will need a 24mm socket to put the new one on and do the same with the impact, don't just pull the trigger, do it on spirtz I guess you can call it. .. it's that simple..