Subject: E32, E34, E23, E28 use the same pump as E24, but double chak on RealOEM- @ $20 Author: bmw635 (moderator) : member since October, 2005 : 20985 posts Posted on: 2007-05-12 19:18:45

on Ebay. More expensive to rebuild so buy used. If the PS lfuid is leaking at every connection then the pressure senor on top of the accumulator mught be plugged- replace.

SI Board in E24 & E28 from 1983-1988 is the same, but double check RealOEM. I know these cars inside out last 15 yrs but time takes it's toll on memory.

Bad bomb/ accumulator is when you step on the brake and the red light flash on dash for split second(sign of failing) or if there's no power assist after shut off engine then bomb is dead. Don't think it's related to brakes!

Does the pedal goes to floor after couple second? Could be bad O-ring on the piston inside the master so master must be replaced. E24, E28 and E31 master will fit but E31 is an upgrade for performance as it's larger.

Peter- OC, S.CA
3/98 Supercharged AC Schnitzer 740IL, 91k mile, clear lens, 100w Hella ,PowerFlex bushing, Alpine sub & amp. NAV & TV waiting for install!
5/86 Euro 635Csi, 230k mile, custom 3.7L engine , Bisltein Sport & Eibach, 3 pcs Epsilon superlite, SS MAF- waiting for supercharge motor.

• brake and temp gauge problem... help needed - jarni2 2007-05-12 01:57:21 (758 views)
  • Re: brake and temp gauge problem... help needed - cwsixer 2007-05-24 01:38:01 (737 views)
    • Re: brake and temp gauge problem... help needed - jarni2 2007-08-03 13:12:31 (602 views)
      • E31 850 or E32 750 master would work and it's larger so it will give more brakin - bmw635 2007-08-03 13:20:00 (621 views)
        • Hello, The problem with brakes is still here.... - jarni2 2007-08-13 10:44:29 (566 views)
          • Re: Hello, The problem with brakes is still here.... - jarni2 2007-08-13 10:51:28 (618 views)
            • Don't know the problem you're having so post this on E23 forum as there's lot - bmw635 2007-08-15 15:32:49 (619 views)
              • Re: Don't know the problem you're having so post this on E23 forum as there's lo - jarni2 2007-08-26 15:55:07 (600 views)
                • Not sure if those are problems! Here's why: - bmw635 2007-08-26 19:18:40 (576 views)
                  • Re: Not sure if those are problems! Here's why: - jarni2 2007-08-27 15:36:14 (590 views)
                  • Re: Not sure if those are problems! Here's why: - jarni2 2007-08-27 04:19:10 (560 views)
                    • You have to bleed the fluid 1st as the warning light might be triggered by no (url) - bmw635 2007-08-27 16:33:47 (610 views)
                      • Re: You have to bleed the fluid 1st as the warning light might be triggered by n - jarni2 2007-08-30 14:06:30 (565 views)
                        • Probably bad #5 (dist valve). The O-ring leak on the servo is related to power - bmw635 2007-08-30 18:24:46 (613 views)
                          • Re: Probably bad #5 (dist valve). The O-ring leak on the servo is related to pow - jarni2 2007-08-31 14:44:41 (576 views)
                            • Try to post without sign up? I think you can. (nt) - bmw635 2007-08-31 15:17:06 (552 views)
                          • Correction #5 (proportioning valve). (nt) - bmw635 2007-08-31 02:21:35 (521 views)
  • Temp gauge is probably bad circuit on SI board as battery leaks may have ate the - bmw635 2007-05-12 04:28:40 (721 views)
    • Re: Temp gauge is probably bad circuit on SI board as battery leaks may have ate the - jarni2 2007-05-12 07:35:05 (712 views)
      • Don't know about the brake then! Where's PS leak? Do you want to fix it? - bmw635 2007-05-12 13:24:47 (715 views)
        • Re: Don't know about the brake then! Where's PS leak? Do you want to fix it? - jarni2 2007-05-12 14:57:44 (663 views)
          • E32, E34, E23, E28 use the same pump as E24, but double chak on RealOEM- @ $20 - bmw635 2007-05-12 19:18:45 (729 views)
            • Re: E32, E34, E23, E28 use the same pump as E24, but double chak on RealOEM- @ $20 - jarni2 2007-05-13 13:04:53 (766 views)
              • The red light flash on dash is bad bomb- use a pointed chisel to tap on the - bmw635 2007-05-14 02:02:18 (741 views)
        • Re: Don't know about the brake then! Where's PS leak? Do you want to fix it? - jarni2 2007-05-12 14:57:43 (668 views)