Braking Problems (HELP!)
Ed_Lauwerens
03-02-2005, 11:57 PM
I have a problem with my braking system. When I push the brakes fast, the red braking problem light lights up and it takes a delay of 0,5 second for the car actually starts braking. The braking power comes in gradually, instead of as quick as I would expect given the speed I push the braking pedal.
As this seems to be a hydrolic problem, I had all pumps in the braking system replaced one by one, but still the problem exists.
Now I have no clue left.
Does this sound familiar to anyone? Any suggestions on what to do next?
Thanks!
As this seems to be a hydrolic problem, I had all pumps in the braking system replaced one by one, but still the problem exists.
Now I have no clue left.
Does this sound familiar to anyone? Any suggestions on what to do next?
Thanks!
porscheguy9999
03-03-2005, 12:17 AM
For starters, I have never owned a BMW before, but I think that you might have some faulty wiring. That or the pistons in the brake pad are getting old and may need to be replaced. If your 8 is older than 95, then that may be it. If its not an internal problem, and its the brakes themselves, you ma need to replace all discs and pads. Go with some Brembo's or somthing like that. Again, I've never owned a BMW, so this may not be very helpful.
SwissM8
03-09-2005, 08:52 AM
I have a problem with my braking system. When I push the brakes fast, the red braking problem light lights up and it takes a delay of 0,5 second for the car actually starts braking. The braking power comes in gradually, instead of as quick as I would expect given the speed I push the braking pedal.
As this seems to be a hydrolic problem, I had all pumps in the braking system replaced one by one, but still the problem exists.
Now I have no clue left.
Does this sound familiar to anyone? Any suggestions on what to do next?
Thanks!
Sound suspiciously like your brake accumulator is dead (dying) - this is known in 850 circles as the 'brake bomb'. It's located in the front left wheel well and is a pretty easy fix (if you have the repair manual, it's in there). Not sure if the manual says so but remember to pump the brakes about 20 times to relieve the pressure before you remove the bomb (with the engine stopped). Replace the high and low pressure valves while you're at it (inexpensive). When you're ready to bleed the system (via the bleed valve on the hydraulic control unit), use the steering wheel (not the brakes) until no bubbles appear in the discharge.
Also, check you Pentosin level (the type - 7.1 or 11s should be stamped on the reservoir lid). Don't mix the two if you are filling/topping up.
What pumps were replaced? Has a dealer looked at the problem?
As this seems to be a hydrolic problem, I had all pumps in the braking system replaced one by one, but still the problem exists.
Now I have no clue left.
Does this sound familiar to anyone? Any suggestions on what to do next?
Thanks!
Sound suspiciously like your brake accumulator is dead (dying) - this is known in 850 circles as the 'brake bomb'. It's located in the front left wheel well and is a pretty easy fix (if you have the repair manual, it's in there). Not sure if the manual says so but remember to pump the brakes about 20 times to relieve the pressure before you remove the bomb (with the engine stopped). Replace the high and low pressure valves while you're at it (inexpensive). When you're ready to bleed the system (via the bleed valve on the hydraulic control unit), use the steering wheel (not the brakes) until no bubbles appear in the discharge.
Also, check you Pentosin level (the type - 7.1 or 11s should be stamped on the reservoir lid). Don't mix the two if you are filling/topping up.
What pumps were replaced? Has a dealer looked at the problem?
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