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Project Weißer Regen: 91 318iS Restomod

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    Funny how bad days make good stories. Lovely photos as always.

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      Yoikes! Glad you were able to keep it shiny side up and off the curb!

      Thanks for the insight into the insides of the ABS unit.

      Comment


        Good god Jordan. I almost had a heart attack reading your post. I can only imagine how I would have felt had I been behind the wheel.
        How to remove, install or convert to pop out windows
        http://www.r3vlimited.com/board/showthread.php?t=297611


        Could be better, could be worse.

        Comment


          Sounds like a happy ending! That pump is impressive
          09 BMW 328xi touring 6spd
          05 Subaru Outback XT 5spd
          87 BMW 325is
          a few bicycles

          Comment


            Glad you didn't smack the curb! I saw you talking about offering this rebuild as a service, and the ballpark price you posted seemed well deserved when you look at the exploded view of the parts.

            What was the condition of all the rubber seals and o-rings? Did you re-use them all?

            Comment


              Originally posted by Digitalwave View Post
              Glad you didn't smack the curb! I saw you talking about offering this rebuild as a service, and the ballpark price you posted seemed well deserved when you look at the exploded view of the parts.

              What was the condition of all the rubber seals and o-rings? Did you re-use them all?
              I can't speak for every pump out there but in the case of my pump, and the spare pump I tore down for extra inner parts selection all of the orings were in splendid shape. No flattening, or hardening. All seals still soft and supple as new with no signs of aging. Whatever material Bosch specified for these is very high quality and has been altogether unbothered by exposure to brake fluid over the years.

              Given the soft and plump nature of most of them I see no reason why they cannot be reused once thoroughly cleaned and lubricated upon reassembly with fresh clean brake fluid.


              E30 ABS Pump Refurbishment Service
              https://mtechniqueauto.com/

              Comment


                Finished assembling the pump last night, got it installed in the car this evening, and got it thoroughly bled with a power bleeder. Bleeding process was a bit more intensive than normal given the amount of air pockets in the pump but it went straight forward. Bled each caliper in order with just the power bleeder but still had a mushy pedal. Then had my wife pump the pedal 5 times per bleed, 3 times per caliper and the pedal was solid as a rock.

                I've bled the brakes on a lot of E30's and I can say I have NEVER seen fluid move out the caliper bleeder nipple with the speed and volume this car has now...









                E30 ABS Pump Refurbishment Service
                https://mtechniqueauto.com/

                Comment


                  Did you find a source for the anti-tamper caps, or can you get them off and on now without damaging them?

                  Comment


                    Originally posted by redneckvtek View Post
                    Did you find a source for the anti-tamper caps, or can you get them off and on now without damaging them?
                    I had a special tool machined to remove them. Essentially a Giant-ass-torx to 24mm socket adapter.

                    E30 ABS Pump Refurbishment Service
                    https://mtechniqueauto.com/

                    Comment


                      Originally posted by Jordan View Post

                      ABS pump with the missing anti-tamper top cover cap because it looks like the platers lost it..... I'll have to destroy another ABS pump to remove one intact and then send just it out for playing... le'sigh.

                      Sorry, I was referring to the plated dust cap on the top referred to in post 650 (page 44)

                      Comment


                        Sorry, brain fart there... I devised a method to remove them without too much damage so I can reuse them. It would be easier to find replacements, but I haven't had time to look into that as of yet.

                        E30 ABS Pump Refurbishment Service
                        https://mtechniqueauto.com/

                        Comment


                          Hey Jordan when you put your windshield back in did you source the oem tape that goes under gasket?
                          1989 325i LS Swap (Money Pit):https://www.r3vlimited.com/board/sho...d.php?t=244933
                          COTM Feb 2019: https://www.r3vlimited.com/board/sho...d.php?t=428404

                          Comment


                            So is it unreasonable to think that there may be many E30s out there with underperforming brakes due to such build up in the ABS unit? But otherwise fresh brake system? (calipers, lines, MC, reservoir etc.)

                            That is really disturbing to see the gunk inside the unit.
                            '89 325i OBD2 S52 BUILD THREAD
                            Shadetree30

                            Comment


                              Super cool to see this taken apart. Thanks, as always, for documenting the rebuild.
                              I do things.

                              Comment


                                Originally posted by Pootis View Post
                                Hey Jordan when you put your windshield back in did you source the oem tape that goes under gasket?
                                I did not reinstall any of that. Its sheet butyl tape with a thin plastic layer over it. I believe it is primarily for corrosion resistance, but who knows.

                                Originally posted by Sh3rpak!ng View Post
                                So is it unreasonable to think that there may be many E30s out there with underperforming brakes due to such build up in the ABS unit? But otherwise fresh brake system? (calipers, lines, MC, reservoir etc.)

                                That is really disturbing to see the gunk inside the unit.
                                I think its entirely and very likely possible to be the case. The bias limiting valve on the frame rail is going to have some build up on it as well, and all of the caliper bodies always have some inside when you rebuild them. Fact of the matter is that brake fluid is hygroscopic, it absorbs water, and water attacks metals over time. Those corrosively lifted metal particles become suspended in the fluid and eventually find a resting place.

                                I'll have time to go drive the car this weekend and can report back on overall brake feel and response with the "new" pump.

                                Originally posted by Melon View Post
                                Super cool to see this taken apart. Thanks, as always, for documenting the rebuild.
                                It is REALLY cool to see it blow all apart, it is far more complex inside than I gave it credit for.


                                E30 ABS Pump Refurbishment Service
                                https://mtechniqueauto.com/

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