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DIY: Frickin' Rear Wheel Bearings

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    DIY: Frickin' Rear Wheel Bearings

    This is just my insight.

    Removal is a bit harder than installation.

    Remove the axle nut and nut retainer while the car is on the ground. Or at least loosen it. Jack the car up and remove the brakes and rotor. Then unbolt the half shaft from the differential and support it temporarily. Press the half shaft out by using a 3-jaw puller grabbing the hub.



    I used a bearing remover kit (3pc diff sizes) and a slide hammer to it to remove the hub and bearing (both from Harbor Freight). Make sure to remove the circlip first. You'll have to almost break your arm sliding the hammer so many times, but each will come out eventually.

    Clean out the bearing socket really well with scotchbrite or crocus cloth. Next, lube up the inside a bit with a little motor oil. Take the new bearing, which should have already been in the freezer for an hour, lol, and tap it with a regular sized hammer around the outside to get it started. Then assemble the HF bearing tool (largest of 3 I think) so that the end is holding on the edges of the back of the socket. It might slip off a few times before you can get it started, but eventually it will hold in place. Crank the bearing in by tightening the nut onto the washer from the outside. Once it is flush with the socket edge, you may have to take the old bearing and hammer it into the new one until it is fully seated in the back of the socket. Replace the circlip.

    Now the hub can be pressed by making a simple tool. Go to Lowe's and get a 5/8 (I think) threaded rod about a foot long. They come precut and ready to go. Then get 2 or 3 different sized washers. Get at least 2 of each. Make sure one size is just bigger than the inner race of the bearing, and make sure you also have one that's a little bigger than the inner hub diameter. Get 4 nuts.

    Reassemble the parking break first, if you decided to remove it. Now lube up the hub a little and start it into the bearing with a hammer. Now assemble the tool so that the back washers are flush against the INNER race of the bearing with one nut behind holding. On the outside the big washer(s) should push against the hub and tighten in place with one nut. The last two nuts tighten together at the end of the rod so you can keep the rod from turning while tightening the single nut. Tighten it down until the hub is all the way in.

    Clean and grease up the inside of the hub. Clean and grease up the axle. Push the axle back in as far as possible by hand. You can use a rubber mallet on the back of the half-shaft to get it in a little further. Once it's in enough to thread the nut on, you can use the nut to pull it in. Once the car is on the ground, torque it accordingly and install a new nut retainer.

    Use this info too!!! http://www.schattenbaum.org/tech_art...el_bearing.htm

    Good luck!!
    Last edited by DarkWing6; 04-16-2008, 05:31 AM.

    "If I were filthy rich I'd still drive my E30."

    #2
    How do you remove the nut retainer? No DIY or anything I've seen says how to do this.

    1986 325ES LeMons Racer

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      #3
      I just did both sides today w help in about 4hrs :) will post pics soon.
      Renting my rear wheel bearing tool kit. SIR
      http://i25.photobucket.com/albums/c5...ps6debf0b0.jpg

      Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

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        #4
        Originally posted by ///M42 sport View Post
        I just did both sides today w help in about 4hrs :) will post pics soon.
        I cannot get my RR hub off, or push the axle out. Using a 3 prong puller with as much force as possible...any help?

        1986 325ES LeMons Racer

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          #5
          I use an air hammer to knock the shafts out of the hub, takes all of 5 seconds to remove them. Use large circlip pliers to remove the circlip that holds the bearing in.
          4hrs is a good time to r&r both rear bearings without the factory tools. They are truly a PITA job to do, right up there with subframe bushings (if you don't have a press)...
          '88 M3.2 S54 Lachssilber/Black
          '07 335i Alpine/Black Sedan
          '12 X5 3.5i Alpine/Black
          iS Splitters For Sale, PM ME!
          sigpic

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            #6
            I've done easily 1000 hits on the slide hammer and the hub still won't come out. It wobbles a bit, but it doesn't look like it's come out at all and sure as heck won't pop out.

            Any ideas?

            1986 325ES LeMons Racer

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              #7
              i use a pipe from the backside. it fits the outside of the hub and only takes a few good hits

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                #8
                Originally posted by gazellebeigem3 View Post
                i use a pipe from the backside. it fits the outside of the hub and only takes a few good hits
                I gave her several good hits and got nothing. Here's what I'm left with...


                1986 325ES LeMons Racer

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                  #9
                  did you spray the shit out of it?

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                    #10
                    there was someone on the board who was willing to rent out his SIR kit for rear wheel bearings IIRC.
                    seien Sie größer, als Sie erscheinen


                    Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

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                      #11
                      Originally posted by gazellebeigem3 View Post
                      did you spray the shit out of it?
                      Only with the best! Royal Purple's Max Film.

                      1986 325ES LeMons Racer

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                        #12
                        I had a bad rear bearing that was seized all to hell in the trailing arm to the point we damn near broke my B90 bearing tool trying to pull it. We ended up swapping the whole trailing arm with another one to make life easier at the time (although we were also doing trailing arm/sub frame bushings at the sametime) so it only made sense to do it that way. I ended up having to use a vertical press to get it out at a later time...

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                          #13
                          Well I took the trailing arm to a shop to have them pressed out and in, but now having a hell of a time getting the halfshaft splines back into the hub. Man, this was a huge mistake.

                          1986 325ES LeMons Racer

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                            #14
                            Originally posted by DrewC View Post
                            Well I took the trailing arm to a shop to have them pressed out and in, but now having a hell of a time getting the halfshaft splines back into the hub. Man, this was a huge mistake.
                            I use my impact hammer with a flat blunt tip on it against the hub face while pushing on the half shaft with my other hand. This pushs the shaft into the hub far enough to screw the nut on. Yes that statement sounds strange......
                            '88 M3.2 S54 Lachssilber/Black
                            '07 335i Alpine/Black Sedan
                            '12 X5 3.5i Alpine/Black
                            iS Splitters For Sale, PM ME!
                            sigpic

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                              #15
                              Originally posted by DrewC View Post
                              How do you remove the nut retainer? No DIY or anything I've seen says how to do this.

                              Should be able to dig it out with a screw driver.
                              sigpic

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