new Hawk 5.0 pads uneven rotor wear near center

pwrdbyryce · 12-13-2023, 12:30 AM

I just installed new Hawk 5.0 pads about 2 weeks ago, but kept the rotors. I'm noticing a rust ring close to the center. Seems like it's not making contact to the rotors. I also forgot to bed the pads in when I installed them, but did it today following the procedure from Hawk. Still, it didn't clear it up.

Has anyone encountered something like this before? Is there any other solution aside from new rotors?

Would also be open to any suggestions for rotor brands. Thanks!

2016 340i m sport

Billfitz · 12-13-2023, 07:32 AM

I can see the pad extending over that section of the rotor, so why it's not making contact is anyone's guess. If that ring of rust wasn't there before you changed the pads then it's the pads at fault, not the rotors. New rotors would probably suffer the same fate.

pauli18c · 12-13-2023, 08:23 AM

My guess would be that something possibly got stuck in between the old pad and rotor and created a groove in the rotor. Then the new pad was flat again and didn't have the indent to match the rotor anymore. Thus it's no longer making contact with it

Also, did you measure the rotor thickness before slapping new pads on?

Orion4 · 12-14-2023, 03:58 PM

Is that occurring on all 4 rotors or just one. If only one, pull the caliper and inspect the pad surface to ensure it is even or has a groove in it, although I've never heard of such an issue with Hawks.

12-13-2023, 12:30 AM	#1
pwrdbyryce New Member 0 Rep 8 Posts Drives: 2016 BMW 340i Join Date: Mar 2020 Location: San Francisco, CA iTrader: (0)	new Hawk 5.0 pads uneven rotor wear near center I just installed new Hawk 5.0 pads about 2 weeks ago, but kept the rotors. I'm noticing a rust ring close to the center. Seems like it's not making contact to the rotors. I also forgot to bed the pads in when I installed them, but did it today following the procedure from Hawk. Still, it didn't clear it up. Has anyone encountered something like this before? Is there any other solution aside from new rotors? Would also be open to any suggestions for rotor brands. Thanks! 2016 340i m sport Attached Images
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12-13-2023, 07:32 AM	#2
Billfitz Lieutenant General 8245 Rep 16,088 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	I can see the pad extending over that section of the rotor, so why it's not making contact is anyone's guess. If that ring of rust wasn't there before you changed the pads then it's the pads at fault, not the rotors. New rotors would probably suffer the same fate.
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12-13-2023, 08:23 AM	#3
pauli18c Lieutenant 211 Rep 519 Posts Drives: 2017 340i RWD M Sport Join Date: Jun 2019 Location: Chicago iTrader: (4)	My guess would be that something possibly got stuck in between the old pad and rotor and created a groove in the rotor. Then the new pad was flat again and didn't have the indent to match the rotor anymore. Thus it's no longer making contact with it Also, did you measure the rotor thickness before slapping new pads on? __________________ 2017 340i M Sport Alpine White / Coral Dorch Stg2, CTS catless, xHP, Custom E50 Tuned by Shoup
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12-14-2023, 03:58 PM	#4
Orion4 Lieutenant Colonel 481 Rep 1,572 Posts Drives: 2013 335i Sport Line Sedan Join Date: Aug 2009 Location: Melbourne, FL iTrader: (0)	Is that occurring on all 4 rotors or just one. If only one, pull the caliper and inspect the pad surface to ensure it is even or has a groove in it, although I've never heard of such an issue with Hawks.
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