Bremsen: Hi boys I need some help, round ball

[Rosemary]

Hello guys here on 7er,
I was told by my garage that I need a round ball which fits under the car, left, and it's something to do with the brakes. There is some air in that ball, so that I can brake over and over again.
He told me what it is, but I've since forgotten.
Anyone have an ebay link for this item perhaps?
Thanks beforehand, and have a lovely hot summertime, I'm wearing almost nothing ;-)

[VollNormal]

Zitat von Rosemary

wearing almost nothing ;-)

Huh? It's f.....reezing cold out here! 23° at the most.

Oughta be No. 10: Druckspeicher (pressure reservoir)  click me

[peter becker]

Hello

Look at this foto und you´ll see the round ball for the brakes..... on the
top end of the left wheel..... I´ve heard, changing is possible without removing
the Front of the car.



Peter

[BestDad55]

Hi,

perhaps it might be this one:



Otherwise you can search in ebay for the keywords " Druckspeicher E32 750".

Greets
Volker

[Erich]

Rosy, what is the reason that you need the 'bomb' = pressure reservoir?
Is the brake pedal very hard? Then it has to be replaced.


BRAKE BOMB REPLACEMENT

1. Get in car and with engine off, pump brake pedal twenty times (relieves the pressure).

2. Loosen lug nuts on drivers side wheel. Open hood, and take lid off of PS reservoir.

3. Jack up and support (jack stands are good) the front end, or a least the driver’s side.

4. Remove the wheel/tire assembly.

5. Remove the two bolts in left front wheel housing that hold the alternator intake air duct and remove the duct (this is a horizontal panel of fiberglass and is just below the bomb).

6. Now you can see the bomb and the two (10 MM or 12 MM) bolts (top and bottom) that support the
Bomb. You can also see the compression nut, but can’t get a wrench (19 MM on mine) on it.

7. OK, here is my non professional method of removal:

a. Using a dremel or any cutting tool, cut a window in the splash panel in front of the tire you removed in the area that will expose the compression nut on the bomb.
a. Using your open end wrench unscrew (at least break free) the compression nut and then you can hand loosen and remove. Paper towels or rags beneath the bomb will catch any residual fluid that may leak out, do not expect a lot of fluid.
b. Now remove the two support bolts and the bomb drops out.

8. Make sure you have a rubber “O” ring gasket to go over the threaded portion of the bomb (my
Bomb did not come with one and my old bomb had none (dealer item and about $3.00).

9. Lubricate “O” ring with Pentosin, place over threaded neck of bomb, place bomb in position and lightly (finger tighten) the two support bolts (just to hold bomb in place).

10. Thread, carefully the compression nut onto the bomb and tighten (it takes only about 30 lb/ft of torque).

11. Tighten support bolts, top off PS accumulator, start engine, pump up brakes and check PS accumulator one more time, checks for leaks (you shouldn’t have any). Replace panels, replace
Wheel and tire assembly, lower vehicle to ground, test drive.

13. Check PS accumulator one more time, and top off if necessary.

14. I cut a piece of black plastic slightly larger than the window I cut out and RTV’d it over the hole I cut so I am ready for the next time. I bought my BRAKE ACCUMULATOR from Bimmerparts.com, but check for prices, (bombs for735’s are less expensive than 750’s).

Written by: "Bubba" Richard “The Bear” LaBarre
------------------------------------------------
On the German forum I have read that the bomb can be removed from below when you have the car on a lift or at least on jacks.Dansker who has a repair shop says it can be done in 1 hour:

Den Druckspeicher kannst Du ausbauen,ohne die Stosstange abzunehmen. Oben am Dom die Verschraubung abschrauben,dann die beiden Halteschrauben am Speicher abnehmen. Evtuell musst Du auch oben am Verteilerstueck die andere Rohrleitung abnehmen,weil Du sonst das Rohr zum Speicher nicht aus dem Verteilerstueck bekommst.Ist Oben etwas Hakelig,das Rohr am Relaiskasten vorbei zu bekommen. Allerdings musst Du etwas mehr Bodenfreiheit haben,um die Bombe mit dem Rohrnach Unten Heraus zu ziehen.(Wagenheber unter die Vorderachse).
Ich habe das vor circa 2 Monaten so gemacht,(circa 1 Stunde Arbeit)
Gruss Dansker

use google translate for this.

and for the size of the wrenches see the online ETK spare parts catalog. When I did my LAD shocks, we used crawfoot tools or open wrenches for brake hoses.

[Rosemary]

Wow, what a 'to-do' !
Thanks for the info, it was my garage who said the 'bomb' needs replacing, and yes, the brake is kinda hard pressing. I guess I'm gonna print out the German instructions, as they repair it anyway.
They did tell me to buy one off ebay, as it's cheaper, just have to find out which one is the right model.

[Rosemary]

Also, I'm after those plastic knobs for the boot, which connect the back plastic to the car. Any ideas?

[Erich]

the brake bomb is available in 2 versions
1 connection or 2 connection.
Based on your production year and RHD it should be this with 2 connections
 RealOEM.com BMW E32 750iL Hydraulic brake servo unit
PRESSURE ACCUMULATOR 1 from built year12/1990 34331162056 $491.09
(that is realoem $ price, calculate with about 230 EURO)

so the one Volker linked above probably does not fit

Ask if it has one or 2 connections,
The one with 2 connections is probably dealer item only 34331162056
In Germany I would then buy if rom Cuntz in Speyer, you get 7-forum discount.
Go on the left to Mitgliederbereich, scroll down to Mitgliederangebote and there is Cuntz. List price is 232 EURO plus MWST and you get 20% discount in this case. Or call Patrick directly, he understands English, no problem.
Patrick's phone number is here
 http://www.7-forum.com/forum/20/vord...ntz-99234.html
The clips for the boot are called lock 51711916197
number 10  RealOEM.com BMW E32 750iL Trunk trim panel

screw trim panel, here you can see the pic better
 Pelican Parts - Automotive Parts and Accessories - Porsche & BMW

and in case you buy the trim clips in USA, the brake bomb is also much cheaper there,
 Pelican Parts - Automotive Parts and Accessories - Porsche & BMW
and Lemforder brand! $ 189.25 is 135 EURO only, so even paying for USPS and import duty, might be cheaper, but takes longer

[Erich]

another option to get these things cheaper is to visit Andre, he probably has them used

according to your profile you live somewhere near Wiesbaden, his shop is
ANDRE' HÖTZEL
Wiesbadener Str. 89 - 91
55252 Mainz - Kastel

Tel. : 06134 / 291912

Andre also speaks English, no problem. Just visit him and he can find out the parts you need.

[McTube]

Zitat von Rosemary

Also, I'm after those plastic knobs for the boot, which connect the back plastic to the car. Any ideas?

Get them at the dealership, they are dirt cheap. It´s part 10, get some of 11, too, they are frequently broke and even cheaper

 Trunk trim panel BMW 7' E32, 750iL (M70) ? BMW parts catalog

Regards,

Michael