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03-30-2014, 10:51 AM | #1 |
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Rear disc rotor install?
Hi folks,
Does anybody know of a rear disc rotor install DIY for the 135i? I can't find one at all and have no idea if it's an easy or difficult job...? Thanks in advance! |
03-30-2014, 11:10 AM | #2 |
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Find one for the 3-Series. It should very similar if not the same. There's nothing special about how the rotors are mounted to the car, it's just a few bolts, the brake pad carrier and depending on which side your working on, the brake sensor. It's a pretty straightforward and relatively simple job to do.
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03-30-2014, 12:17 PM | #3 |
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I presume the calipers need to be removed then? I know you can do the rear pads without removing them, but I'm guessing it'll be too tight to get the rotor itself out without removing them?
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03-30-2014, 01:04 PM | #4 | |
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Remember not to have the emergency brake set when you are attempting to remove your rear brakes. GL.
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03-30-2014, 01:10 PM | #5 |
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Me and my brother did a rear rotor and brake pad change on his 335i. It was pretty straight forward. Like others have said tho, watch some YouTube videos about it to get an idea about how to do it
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03-30-2014, 01:23 PM | #6 |
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Ok, thanks. FWIW, I've changed all the pads before and installed things like downpipes by myself, so I'm at least semi capable.
Does anybody have a torque figure for the rear caliper bolts? |
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03-30-2014, 03:44 PM | #7 | |
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front pad carrier to steering knuckle 81 ft-lb rear pad carrier to wheel bearing carrier 50 ft-lb brake caliper to pad carrier 22 ft-lb brake fluid hose to caliper 18 ft-lb brake fluid hose to steel line 9 ft-lb road wheel to hub 87 ft-lb front bleeder screw 9-13 ft-lb rear bleeder screw 5-8 ft-lb brake rotor mounting screw 12 ft-lb |
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04-16-2014, 05:03 PM | #9 |
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Ok, so I did the fronts on Sunday, just need to do the rears now. Dies anybody know if the rear discs just come straight off with the handbrake released, or is it still necessary to wind the adjusters off a bit as well? I'm just worried about adjusting it back incorrectly. Thanks.
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04-16-2014, 06:29 PM | #10 | |
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04-17-2014, 06:34 AM | #11 |
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Great, thanks. I was quite surprised how easily my front discs came off - no hammering required, they just came straight off once I undid the retaining screw.
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04-17-2014, 07:33 AM | #12 |
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Probably ...
Unless you use your hand brake often while in motion, in which case a step in the drum might keep you from pulling the rotor off. In which case you will need to back off the adjuster, which you will need to adjust again anyway for the new rotor. Best to be prepared just in case. The attached picture shows where to find the adjuster (1 o'clock on the LH side, 11 o'clock on the RH side). It is accessible through the bolt hole with a flat screwdriver, so you need to pull a stud if you are using wheel studs. If you have to loosen the adjuster to get the rotor off, it is easy enough to adjust for the new drums. Tighten until the brake comes on, then back off a few clicks (I think 3 or 4 is the recommendation, but you can judge by your hand brake motion). |
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04-17-2014, 08:49 AM | #13 |
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Superb, thanks. When you say 3 - 4 clicks, I presume the adjuster actually clicks as it rotates to indicate the setting? My worry is creating an uneven bias between the rears, not that I guess it'd make much difference, but I'd like both brakes to be firmly engaged when the handbrake is up - don't want the car rolling away if I park on a hill!
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04-17-2014, 09:14 AM | #15 | ||
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The caliper carrier is also held by 2 bolts. Both easy to locate and remove |
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04-17-2014, 01:49 PM | #17 | |
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The Bentley service manual for the E9x 3-series says to turn the adjuster until the wheel can no longer be rotated and then back it off by 9 notches (not 3 as I suggested earlier). If you do the same on both sides the rear parking brakes will be balanced. |
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135i, disc, diy, install, rotor |
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