A few weeks ago, I swapped out the front factory pads and rotors on my MKZ. Amazingly enough, with ~75K, the pads still had meat on them(that's a lot of highway miles) but I had a warped rotor that was bugging me and figured that was as good a time as any.
I put NAPA gold ceramic pad and gold rotors on. I've put about 1500 miles on it since then-two ~500 mile round trips of mostly interstate, and a couple hundred around town driving.
Yesterday, in a quick once over, I saw noticeable grooves in both rotors that are deep enough that I can feel them with my finger. As can be seen, these rotors otherwise don't have much wear, with the radial machining still visible.
I'm really particular about cleanliness any time I do brake work. That includes wiping both the rotors and the pads with brake cleaner before and after application, as well as cleaning any part I remove(regreasing as appropriate) and anything around the brakes. I use the good stuff(chlorinated CRC) to both get things as clean as possible and avoid leaving residue.
Any idea what could cause this? Do I need to pull these back down and redo the job with fresh materials, or possibly just give the pad faces a quick sand and clean and hope it will smooth out? Or, alternatively, should I just let it be?
I put NAPA gold ceramic pad and gold rotors on. I've put about 1500 miles on it since then-two ~500 mile round trips of mostly interstate, and a couple hundred around town driving.
Yesterday, in a quick once over, I saw noticeable grooves in both rotors that are deep enough that I can feel them with my finger. As can be seen, these rotors otherwise don't have much wear, with the radial machining still visible.
I'm really particular about cleanliness any time I do brake work. That includes wiping both the rotors and the pads with brake cleaner before and after application, as well as cleaning any part I remove(regreasing as appropriate) and anything around the brakes. I use the good stuff(chlorinated CRC) to both get things as clean as possible and avoid leaving residue.
Any idea what could cause this? Do I need to pull these back down and redo the job with fresh materials, or possibly just give the pad faces a quick sand and clean and hope it will smooth out? Or, alternatively, should I just let it be?
Last edited: