by replaced entire brake assembley, list parts.
your ABS unit could have a problem.
I am totally stumped...
I have a 1990 e34 with 150k miles on it... this summer when the air temprature was hotter than 90 degrees my right front caliper would totally lose its ability to brake. I replaced the entire brake assembly and flushed the whole system. Didn't work!!! Has anyone had this problem?
by replaced entire brake assembley, list parts.
your ABS unit could have a problem.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue
A while back I was working on a Chevy van that had sort of the same problem. You could be driving along, hit the brake, and the brakes would not work. Turns out it was a speed sensor had failed and was messing up another one.
is it overheating? Could be the brake line (rubber hose) is clogged inside and needs replacement.Originally Posted by gocallahan
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Originally Posted by 632 Regal
I think the clogged brake line might be the problem.... the motor is not over-heating.... thanks for the reply!
Originally Posted by BillionPa
The entire whole brake caliper was replaced. What is the ABS unit and where is it in the car? Thanks for the reply...
the brake system goes like this
Master Cylinder
|
ABS unit
|
metal brake pipes
|
rubber brake lines
|
calipers
for rear brakes there is an additional metal brake pipe on the trailing arm followed by another rubber line.
the brake pipes in the engine bay rarely have problems, but the rubber lines and metal ones under the car and on the trailing arms can corrode to nothing.
when you were bleeding the right front caliper did you notice any additional pedal pressure required to pump the fluid out? if it was easy like the other calipers then the lines could be ok, although vacuum flow testing is the best solution to find clogs.
the ABS unit next to the master cylinder is a series of high speed pumps that limit the pressure applied to the caliper, if one activates when hot it can reduce caliper clamping torque. the ABS unit gets HOT even when not operating, as it is close to the engine, and the metal brake pipes conduct heat away from the calipers.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue