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Pad contact on rotor after new install?
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01-08-2023, 03:16 PM | #1 |
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Pad contact on rotor after new install?
Hey guys,
First post here. I just replaced pads and rotors on my E91 328xi wagon. I bought this exact kit from FCP euro: https://www.fcpeuro.com/products/bmw...6ktfr4#fitment I installed the rear pair yesterday, everything went smooth enough. However after going for the initial drive I noticed the coating has not been removed from the inside part of the rotor. My guess is the pad is not fully contacting the rotor? View post on imgur.com View post on imgur.com I don't imagine the pads are in wrong as the tabs seem to only fit one way, and I copied how the previous pads were set in the caliper. Did I do something wrong? Is this typical? Note it is like this on both sides, so if I installed correctly I did the same on both sides. Thanks |
01-08-2023, 03:53 PM | #3 | |
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I think my next step will be to go back and re-lube everything. |
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01-08-2023, 04:07 PM | #4 |
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Silicon brake grease is what I use.
However I’ve seen on TIS before to only clean the guide pins and not apply any grease. You may not have hit the brakes hard enough to rub off the coating. I imagine one pad would contact the disc first and then the other side. The less friction in the caliper and guide pin system the more even the wear will be. |
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01-26-2023, 12:02 PM | #5 | |
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01-26-2023, 01:04 PM | #6 |
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I would not "hammer" the brakes hoping to get more pad contact with the rotor. I have always done about six passes at about 35MPH and not come to a complete stop, overheating the brakes during bedding may warp the rotors. If the install is correct, the pads will soon wear that area of the rotor.
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01-27-2023, 09:46 AM | #7 | |
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I normally do 8 repetitions of 60mph then brake without engaging abs down to 15mhp, then accelerate to 60mph and repeat. I do warmup the brakes first with light braking and then do the procedure. Do it at night with no traffic. Make sure you have a nice clear stretch of the road. Never at any time during the bedding procedure should you come to a full stop with brake pads engaged to the rotor. Last edited by Wolf 335; 01-30-2023 at 07:09 AM.. |
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01-27-2023, 09:55 AM | #8 | |
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01-29-2023, 02:04 PM | #10 |
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Drives: E92 325i MSport Coupe
Join Date: Apr 2012
Location: UK South East
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Fitted new discs and pads myself recently and for a few weeks only about the third of the braking area was being swept. But eventually the pads fully bedded in and all's well...
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01-31-2023, 07:25 AM | #11 |
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I shouldn't use the term "hammer" but yeah you need to set in the pads.
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335i, sport pkg, 3 pedals, Blacked out, LED markers, OZ Ultraleggera wheels, Firestone Indy 500s, x-pipe, vibrant 1792, PE mod
MHD stage 2+, BMS DPs, ARM charge pipe, Tial BOV, ARM FMIC, dual cone, M3 control arms, front sway, HAWK pads. https://www.strava.com/athletes/8309149 Follow me on Strava |
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02-03-2023, 10:35 AM | #12 |
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Does this same procedure work for all pad materials (i.e. ceramic) or should ceramic pads be bedded differently? I don't like dusting and want to consider ceramic style pads on existing rotors.
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02-08-2023, 06:35 PM | #14 |
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No that's kind of the thing about everyone saying how to bed pads. I would just refer to the instructions of your brakes pads. In fact some pads even have no bed in, the Akebono are like that I believe although they do have a "break in"/not go super hard on them for X miles.
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