Brake Job Question - 2004 M45 (Y34)

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Double E
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Car: '04 M45 Dark Blue., NAV
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What is the secret for removing the rear rotor? Got the caliper & bracket off, hit rotor with hammer. Does not budge.
E- Brake is off & e-brake pads are backed off. I don’t see anything keeping it on ...but there it stays.

Also, front brakes, the lower slide pin has a rubber boot or cylinder around the base. When I removed it to clean & re-lube, it fights me going back in.

Had to use a c-clamp to push it. The rubber cylinder crawls up the shaft when I try to reinsert it.
I tried to freeze it, lube it, put it in dry…nothing worked. The c-clamp did finally work but it also sheared the very top of the rubber cylinder off.
This happened on both sides. The rubber cylinder is just old or am I missing some re-assembly tip?


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elwesso
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Sometimes rotors can be very reluctant to let go.. Usually on the rotors there is a threaded hole that will take a standard 12mm head bolt. You can thread it in and it will push the rotor off.. I've had a lot of issues where rear rotors don't want to come off but fronts will, sometimes.

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MaxBolus
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I did my rear brakes a couple years back, and don't recall any out of the ordinary difficulty getting the rotors off- I do remember using a soft-face deadblow hammer on it, and it came away from the hub with no real problem. Also, the bolt hole that elwesso mentioned sounds like the next thing to try.

The sliding pin thing really sounds odd. Don't those rubber bellows things have a metal insert in them that the pin slides through? Could that have gotten deformed somehow?

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pedsemdoc
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Double E wrote:When I removed it to clean & re-lube, it fights me going back in.
Had the same thing happen to me after my recent rotor/pad change.
You might have excess grease in the hole that the caliper pin is going through.

"Stick it in and out a few times" - (that's what she said :naughty:) but then wipe off as much of the old grease as possible before applying the new grease.

Craig

Double E
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I thought that too. I even pulled off the rubber sleeve and tried the pin "naked". It went easy enough and hit bottom. I sprayed brake parts cleaner in there, swabbed it clean and still it had to be forced in once the sleeve was back on. I guess the sleeve swells or relaxes a bit when worn?

The rear rotors are still a mystery. I'm going to get a BFH of the deadblow type and try again in a few weeks.

Threading a bolt in the access hole suggested in a response above is pointless as the hole on the OEM rear rotor is not threaded.

Again...the brakemotive kit appears to be the real deal.


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