Home › Forums › Stay Dirty Lounge › The EricTheCarGuy Video Forum › How To Replace Rear Disc Brakes (Full) › Re: How To Replace Rear Disc Brakes (Full) November 5, 2012 at 9:36 pm #474311 PaulParticipant What is the purpose of hitting the philips screw driver with a hammer (@2:51) after installing the new rotor?