Re: 535is brakes

[Kris & Bill Wessale <wessale@xxxxxxxxxx>]

I replaced my Brake Bomb two years ago at the encouraging of other "Digesters"
(doesn't sound so good, does it?).  It fixed the problem, and it was easy, once I
bought the right wrenches, which took three trips to the hardware store.  I had
to buy three brake line / flare nut  wrenches -- the kind that look like a box
end wrench with one flat cut out to make a slot so you can slip them over the
line and then onto the nut.  The hydraulic lines are bolted *tight* into the
Bomb, and you're likely to ruin them (rounding off theirs houlders) if you don't
use these wrenches.  I bought mine at Sears.  The three wrenches I bought are:
13/14, 15/17, and 19/21.

Go for it!

GToyama@domain.elided wrote:

> Bob wrote:
>
> <<Hello,
>     I have an 87 535is, and when the brakes are applied quickly the pedal
> seems to have a lot of resistance for a second. The brakes do not apply
> fully until the resistance gives way. This does not happen when the brakes
> are applie slowly. Any Ideas ?>>
>
>     Yup, BTDT.  You need a brake "bomb", the hydraulic accumulator that
> stores pressure the power steering pump supplies.  Rubber diaphagm inside the
> bomb is dead, and the pump can't provide necessary pressure immediately
> enough, hence the lag you feel in a quick brake application.
>     You may also want to replace the filter in the bottom of the power
> steering fluid reservoir.  It can disintegrate, allowing fragments of the
> filter to get into the bomb and eat up the new diaphragm.  If the filter is
> already fragged, you'll need to flush the hydro system.
>     If you need/want help in R&R'ing the bomb, feel free to email me.  I
> believe there have been recent posts re the procedure, and there are other
> BMW sites that provide such info as well.  I would estimate level of
> difficulty to be 2.5, where 1 is an oil change and 10 is an engine rebuild.
> It's just real messy, ATF all over the place, etc...
>
> Good luck and Happy Bombing,
> Gary
>
> '88 535is
> ...many past Bimmers
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