84 280i Brake Pressure

[280iUSA]

Gentlemen,
Took the car for a ride yesterday and on the way home I lost brake pressure unless I pumped the pedal. Once I got home I visually inspected the car and there are no signs of leaks, reservoir is full. No issues with the brakes until now. Going to get under the car for a closer look. Any feedback would be appreciated. MT

[280iUSA]

Got in the car to move it and the brakes function as they should???

[280iUSA]

Tony, Marcus, Thanks for the advice. Millard

[280iUSA]

RCK974X,
The brake pedal performs as you state. I took a closer look at the rear pads and they definitely need replacing. I can see edge cracks. The hand brake does work but it takes a lot of pressure. Clearly could be adding to the problem.
Would appreciate suggestions on pads and rotors
Millard

[280iUSA]

Mrzigazaga,
I didn't see any residue you speak of and the fluid is very clear. The brakes were performing fine before this issue.
Thanks,
Millard

[280iUSA]

Thanks to everyone for your replies, much appreciated. Clearly some work ahead.
Millard

[280iUSA]

I have the calipers removed but one of the Pistons refuses to come out. Tried compressed air but no luck. I can move it slightly with pliers but it is very tight. Any suggestion?
Thanks,
Millard

[280iUSA]

Appreciate the info brother.
I hit it again with air and it moved a little, very little. I get about 125 psi on my compressor. Maybe a higher psi will blow it out.
BTW, great handle.

[280iUSA]

I was considering letting it soak overnight...

[280iUSA]

The overnight soaking helped loosen the piston a little. Took the caliper to local NAPA machine shop. The shop worker and I did get the piston removed by splitting the caliper and using a penetrating oil, pipe wrench and pri-bars.

Millard

[280iUSA]

Agree. We pried on the lip of the piston. No damage to the caliper.

[280iUSA]

I have brakes again . Had to rebuild the calipers. Three of the 4 pistons where pitted. Removing and installing the calipers wasn't too difficult. The real PITA was the security wires.