PRD2BDF Posted April 21, 2015 Report Share Posted April 21, 2015 On my 2011 9-5, the brakes are warped. It vibrates severely when braking from freeway speeds. I know that. However I am reading conflicting reports. Many people say to replace the rotors and pads while many also say to just replace the pads if the rotors are in good shape and not to turn them. Your thoughts? Quote Link to comment Share on other sites More sharing options...
Not Brian Posted April 21, 2015 Report Share Posted April 21, 2015 I always replace both at the same time, especially if my car were to shake violently when hitting them. Quote Link to comment Share on other sites More sharing options...
turbospec29 Posted April 21, 2015 Report Share Posted April 21, 2015 On my 2011 9-5, the brakes are warped. It vibrates severely when braking from freeway speeds. I know that. However I am reading conflicting reports. Many people say to replace the rotors and pads while many also say to just replace the pads if the rotors are in good shape and not to turn them. Your thoughts? Makes no sense. If your rotors are warped and vibrating they need replaced or turned. New rotors are usually so cheap to replace, I just replace everything. Quote Link to comment Share on other sites More sharing options...
Turbs3000 Posted April 21, 2015 Report Share Posted April 21, 2015 Agreed with above. I prefer to change them both at once. If your having lots of vibration I would definitely change both. Quote Link to comment Share on other sites More sharing options...
Farkas Posted April 21, 2015 Report Share Posted April 21, 2015 change rotors regardless Quote Link to comment Share on other sites More sharing options...
2 Sweet Posted April 21, 2015 Report Share Posted April 21, 2015 Yep, if you only do the pads, it's still gonna vibrate since the rotors are warped. If the rotors were in good shape the brakes wouldn't vibrate Quote Link to comment Share on other sites More sharing options...
TTQ B4U Posted April 21, 2015 Report Share Posted April 21, 2015 I've done both. If they are really bad just replace them with some Brembo Blanks. However if the rotors aren't too bad then you could just have them turned. My Fusion vibrated a little at 25k so I had them turned and replaced the pads. Simple fix and now at 65k with no issues. Quote Link to comment Share on other sites More sharing options...
ImUrOBGYN Posted April 21, 2015 Report Share Posted April 21, 2015 May not be warped, just uneven, burnt in pad deposits. Either way, replace them both. Especially given you can find some super cheap rotors. Quote Link to comment Share on other sites More sharing options...
iwashmycar Posted April 21, 2015 Report Share Posted April 21, 2015 May not be warped, just uneven, burnt in pad deposits. This is one in the same. People just call it "warped" I agree with everyone...turn the rotors if they arent bad and add new pads. Should fix it right up. Quote Link to comment Share on other sites More sharing options...
Sully Posted April 21, 2015 Report Share Posted April 21, 2015 I can't believe no one suggested rubbing the pads on concrete. Smh. Quote Link to comment Share on other sites More sharing options...
Buck531 Posted April 21, 2015 Report Share Posted April 21, 2015 I can't believe no one suggested rubbing the pads on concrete. Smh. I was going to suggest this or rub the new rotors on the concrete. Quote Link to comment Share on other sites More sharing options...
Farkas Posted April 21, 2015 Report Share Posted April 21, 2015 Rub your nads on the concrete. Quote Link to comment Share on other sites More sharing options...
PRD2BDF Posted April 21, 2015 Author Report Share Posted April 21, 2015 I've read what several of you posted about the build-up on the rotor from the pads making it "warped" when it really is not. I will try turning the rotors and new pads. Quote Link to comment Share on other sites More sharing options...
zeitgeist57 Posted April 21, 2015 Report Share Posted April 21, 2015 (edited) I figure we make this thread into a brake-knowledge thread. Cheap as I am, I can't bring myself to buy eBay brakes from PowerSport or BrakeMotive>>>http://www.ebay.com/itm/FRONT-REAR-PERFORMANCE-DRILLED-SLOTTED-BRAKE-ROTORS-AND-CERAMIC-PADS-BMW-325i-/221000420706?fits=Make%3ABMW&hash=item3374a6cd62&vxp=mtr. Went onto RockAuto and priced a cheap but I think reasonable package for aggressive street driving (no real track time, aside from an occasional autoX): Rotors: RAYBESTOS Part # 96387R {#1096387} 5 Bolt Holes Professional Grade - Rear RAYBESTOS Part # 96780R {#1096780} 5 Bolt Holes Professional Grade - Front Pads: CENTRIC Part # 30105580 Premium Ceramic Pads w/Shims - Front CENTRIC Part # 30106920 Premium Ceramic Pads w/Shims - Rear I like that the rotors are coated on the hat, to hopefully hide rust down the road. Also, with shipping and no 5% discount (which I usually get emailed) it's $144.44 shipped, which is as cheap of a package as I can get. Anyone have experience with Centric ceramics or Raybestos rotors? Edited April 21, 2015 by zeitgeist57 Quote Link to comment Share on other sites More sharing options...
BoostedAce Posted April 21, 2015 Report Share Posted April 21, 2015 You can't straighten a rotor without cutting or replacing it..... Just throw rotors and pads in it Quote Link to comment Share on other sites More sharing options...
TA In Progress Posted April 21, 2015 Report Share Posted April 21, 2015 I figure we make this thread into a brake-knowledge thread. Cheap as I am, I can't bring myself to buy eBay brakes from PowerSport or BrakeMotive>>>http://www.ebay.com/itm/FRONT-REAR-PERFORMANCE-DRILLED-SLOTTED-BRAKE-ROTORS-AND-CERAMIC-PADS-BMW-325i-/221000420706?fits=Make%3ABMW&hash=item3374a6cd62&vxp=mtr. Went onto RockAuto and priced a cheap but I think reasonable package for aggressive street driving (no real track time, aside from an occasional autoX): Rotors: RAYBESTOS Part # 96387R {#1096387} 5 Bolt Holes Professional Grade - Rear RAYBESTOS Part # 96780R {#1096780} 5 Bolt Holes Professional Grade - Front Pads: CENTRIC Part # 30105580 Premium Ceramic Pads w/Shims - Front CENTRIC Part # 30106920 Premium Ceramic Pads w/Shims - Rear I like that the rotors are coated on the hat, to hopefully hide rust down the road. Also, with shipping and no 5% discount (which I usually get emailed) it's $144.44 shipped, which is as cheap of a package as I can get. Anyone have experience with Centric ceramics or Raybestos rotors? The Raybestos Professional Grade rotors are not coated. To get the coated hat/edge you have to buy the Advanced Technology rotors. I've used the Adv. Tech rotors along with the Raybestos pads on several of my cars and have always been happy. The coating on the rotors is pretty durable and still looks good even after a few winters. Quote Link to comment Share on other sites More sharing options...
Chadz89GTA Posted April 21, 2015 Report Share Posted April 21, 2015 I have brake motive pads and rotors on my Camaro, I beat it to death every time I drive it. No weird noises and the rotors still look good after a little over a year. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted April 22, 2015 Report Share Posted April 22, 2015 These days with the cost of most rotors (Except BMW and other high end luxury cars) being so low, you are just as well off to get new rotors as you are to have Timbo down at NAPA cut them. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted April 22, 2015 Report Share Posted April 22, 2015 If you really want to save some money just put the car on jack stands, have a buddy put the car in gear and rev it to about 40-60 mph, then take an angle grinder and hit the rotor surfaces. It'll beaight. Quote Link to comment Share on other sites More sharing options...
turbospec29 Posted April 22, 2015 Report Share Posted April 22, 2015 These days with the cost of most rotors (Except BMW and other high end luxury cars) being so low, you are just as well off to get new rotors as you are to have Timbo down at NAPA cut them. This. I've kinda always thought rotors warp from heat. If whatever you run warps in 20k miles then I would think that turning them will just get you another 20k before they warp again. Best to just get a good middle grade rotor like brembo blanks or something better than the current ones. Quote Link to comment Share on other sites More sharing options...
ImUrOBGYN Posted April 22, 2015 Report Share Posted April 22, 2015 You know what? Stop stopping. Problem solved. And if nothing else, the harder you brake, the more it'll shake which is like one of those fancy emergency braking situation alerts you get in something like a Cadillac except your whole car shakes and warns everyone in it. Tight. Quote Link to comment Share on other sites More sharing options...
B3NN3TT Posted April 22, 2015 Report Share Posted April 22, 2015 Happens more frequently on an automatic trans, since you generally don't take them out of gear when stopped. One panic freeway stop, then sit with the pedal down for a few seconds, and your rotors are toast. Quote Link to comment Share on other sites More sharing options...
Cordell Posted April 22, 2015 Report Share Posted April 22, 2015 As everyone has said, get pads and rotors. Ensure that the hub is clean, and properly torque your wheels. If you want to go a step further to ensure your new brakes last, use a dial indicator to ensure there is no lateral runout. Most will say this is overkill, but you cannot feel lateral runout and it will lead to uneven wear and warped brakes over time. If I've had a customer with severe pulsation I will check this when I'm done to ensure there is no issue with the hub or anything else. and properly torque your wheels!!! Quote Link to comment Share on other sites More sharing options...
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