986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

thstone · 05-08-2018, 03:30 PM

Since I replace my pads and rotors at least twice a year, I have gone through a lot of rotors over the past 6 years. In that time I've had one rotor that was actually warped.

However, I recently had another rotor that needed the center hole to be opened up a few mm so it would fully seat on the hub. It would get 95% of the way onto the hub (visually it looked fully seated) and then bind on the hub alignment tabs. The rotor acted like a warped rotor on the car but had no runout at the hat or at the outer edge of the rotor on the bench. WTF? Then I checked the hub and it was fine. WTF #2. I installed/removed it four times before I finally found the seating issue which I was able to fix it with a hand file.

So I'd say that while manufacturing defects are somewhat rare, they can and do happen.

05-08-2018, 03:30 PM	#2
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	Since I replace my pads and rotors at least twice a year, I have gone through a lot of rotors over the past 6 years. In that time I've had one rotor that was actually warped. However, I recently had another rotor that needed the center hole to be opened up a few mm so it would fully seat on the hub. It would get 95% of the way onto the hub (visually it looked fully seated) and then bind on the hub alignment tabs. The rotor acted like a warped rotor on the car but had no runout at the hat or at the outer edge of the rotor on the bench. WTF? Then I checked the hub and it was fine. WTF #2. I installed/removed it four times before I finally found the seating issue which I was able to fix it with a hand file. So I'd say that while manufacturing defects are somewhat rare, they can and do happen. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 05-08-2018 at 03:44 PM.