DanP Posted February 15 Report Posted February 15 First attempt at a rear brake job on our 2022 F54. I'm swapping my worn original pads for EBC Redstuff. I used Bimmerlink to put her in service mode and retract the rear pistons. Got it all ready to reassemble and the caliper won't fit over the new pads. Double-checked the fitment guide, no problem there. Eventually figured out that the piston isn't in far enough, because there's barely enough room in there for the old pads plus rotor. An extra 20mm isn't going to fit. Tried compressing the piston more by turning it clockwise with a crescent wrench. It moves freely going counter-clockwise, but stops decisively, right where it's at for the clockwise direction. Any ideas?
1975_mini Posted Wednesday at 07:37 PM Report Posted Wednesday at 07:37 PM On 2/15/2025 at 2:55 PM, DanP said: First attempt at a rear brake job on our 2022 F54. I'm swapping my worn original pads for EBC Redstuff. I used Bimmerlink to put her in service mode and retract the rear pistons. Got it all ready to reassemble and the caliper won't fit over the new pads. Double-checked the fitment guide, no problem there. Eventually figured out that the piston isn't in far enough, because there's barely enough room in there for the old pads plus rotor. An extra 20mm isn't going to fit. Tried compressing the piston more by turning it clockwise with a crescent wrench. It moves freely going counter-clockwise, but stops decisively, right where it's at for the clockwise direction. Any ideas? is the piston retracted flush with the caliper, like the picture below or still sticking out of the capiler 1975 Mini 1000, 998cc A+ w/ K&N air filter, 10" Mamba wheels
DanP Posted Wednesday at 07:49 PM Author Report Posted Wednesday at 07:49 PM Hey Corey! I should have revisited this post. In the end, the problem seems to have been some combination of having the master cylinder capped, and/or not using a caliper wind-in tool. When I started over a couple days later with a loaner tool from Advantage and the cap off, it all went perfectly smooth. I finger-tightened the calipers all the way in, easy. Had to fight Bimmerlink which didn't want to turn off service mode, but then flicking the electric parking brake on manually fixed that, and everything went back to normal. It honestly really was easy, once I had the proper tools. But of course when you follow a YouTube guide, they always miss one or two key steps. 1
