DIY: IS-F front brake rotors
#47
Intermediate
iTrader: (2)
Help! A few weeks ago I installed new rotors and pads on the front axle. I discovered loud grinding noises when turning the steering wheel when driving it initially. I took the wheels off and looked at the rotors and noticed they were scraping on the inner side of the rotor and brake pad by seeing circular gouges in both the rotors and pads. I removed the pads and calipers and re-seated the rotors again and reinstalled the calipers, pads, and wheels and went for another drive. Same problem happening and now I am stumped. I removed the brake reservoir cap during this process, but did not bleed the brakes. Could that be the problem? Obviously I would need to buy new rotors and pads to replace these gouged ones, but would like to get to the bottom of the problem before wasting money on another set of new rotors and pads. This was my first time doing this on the F (I did do a pad change only 2 years ago with no issues) but also have done several other rotor and pad changes on other vehicles. Thanks in advance!
#48
Former Sponsor
iTrader: (1)
So the rotor is physically moving side to side inside the caliper and contacting the caliper body under load? Assuming the rotors themselves are not the problem (may have got the wrong part or something silly) then it sounds like your front wheel bearings may be the issue.
-Matt M.
-Matt M.
#50
Driver School Candidate
Help! A few weeks ago I installed new rotors and pads on the front axle. I discovered loud grinding noises when turning the steering wheel when driving it initially. I took the wheels off and looked at the rotors and noticed they were scraping on the inner side of the rotor and brake pad by seeing circular gouges in both the rotors and pads. I removed the pads and calipers and re-seated the rotors again and reinstalled the calipers, pads, and wheels and went for another drive. Same problem happening and now I am stumped. I removed the brake reservoir cap during this process, but did not bleed the brakes. Could that be the problem? Obviously I would need to buy new rotors and pads to replace these gouged ones, but would like to get to the bottom of the problem before wasting money on another set of new rotors and pads. This was my first time doing this on the F (I did do a pad change only 2 years ago with no issues) but also have done several other rotor and pad changes on other vehicles. Thanks in advance!
#51
Intermediate
iTrader: (2)
So the rotor is physically moving side to side inside the caliper and contacting the caliper body under load? Assuming the rotors themselves are not the problem (may have got the wrong part or something silly) then it sounds like your front wheel bearings may be the issue.
-Matt M.
-Matt M.
Thanks. I definitely checked the rotor size and specs visually with the new and old rotor.
#52
Former Sponsor
iTrader: (1)
Have you checked the wheel bearings for play?
-Matt M.
#53
Intermediate
iTrader: (2)
Can you provide any photos or more information? The more you provide, the easier it will be to try and diagnose. Can you see damage on the caliper body or surrounding ball joints? Where exactly is the rotor making contact?
Have you checked the wheel bearings for play?
-Matt M.
Have you checked the wheel bearings for play?
-Matt M.
I have not checked the wheel bearings for play. Would it be possible for both to go bad at the same time, especially during a rotor and pad change? And that I did not have this issue before?
#56
Driver School Candidate
Help! A few weeks ago I installed new rotors and pads on the front axle. I discovered loud grinding noises when turning the steering wheel when driving it initially. I took the wheels off and looked at the rotors and noticed they were scraping on the inner side of the rotor and brake pad by seeing circular gouges in both the rotors and pads. I removed the pads and calipers and re-seated the rotors again and reinstalled the calipers, pads, and wheels and went for another drive. Same problem happening and now I am stumped. I removed the brake reservoir cap during this process, but did not bleed the brakes. Could that be the problem? Obviously I would need to buy new rotors and pads to replace these gouged ones, but would like to get to the bottom of the problem before wasting money on another set of new rotors and pads. This was my first time doing this on the F (I did do a pad change only 2 years ago with no issues) but also have done several other rotor and pad changes on other vehicles. Thanks in advance!
You can check it with just the wheel off. Visually and with your hand, carefully follow it around the rotor. Making sure there is about a 1/4 of inch space between it and the rotor.
#57
Driver School Candidate
Had never replaced brakes/pads before, but decided to give it a go with this write-up. Had a buddy help who is very competent with cars. It was unbelievably easy. Between the Rotors (~450 on eBay for 4 Brembo Rotors and another $125-150 for StopTech Street pads, I was out around $600 for parts). A few odds and ends rounded it up to around $625. This is less than a third of what the dealer wanted, and took us right around 3 hours and we took our time. The best piece of advice is make sure you have the 8x1.25 bolt that is mentioned. Once you have the caliper off screw the bolt in to the open hole on the rotor and it will pop right off. It was like magic. Thanks Cayman for taking the time to put these write ups together, excellent work!!!
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caymandive (03-06-17)
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