Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - S13 Brake Swap Sticking (R32 GT-R)

marc-s13 · 06-16-2019, 02:35 PM

Here's the specs of everything:
1990 S13 Hatch (ABS)
S13 Automatic brake booster
Z32 Master
R32 GT-R non brembo front brakes
Chasebays braided SS conversion lines

I bled the two fronts and the abs module yesterday. There is no air in the lines.

When the car is rolling in neutral and I cut the engine, I can hear the pad rubbing on the rotor. There's no gap between the pad and the rotor ever. The pistons don't want to retract.

I took the pads out, and had a friend press the pedal a bit. The pistons do not compress evenly. I tried greasing the slider pins, but it didn't help, and that's not the issue if the pistons still didn't retract with the pads out.

Few things I think could be the problem:
- I rebuilt them wrong (I don't know... both sides? Seems unlikely to me. I think I did it correctly)
- I was using old brake fluid (not previously used, just sitting for a while)
- Maybe there's still some air in the system? Don't know how this could be... Maybe I didn't let the caliper fill properly.
- Maybe my automatic booster is the issue
- Unadjusted push rod on booster? Still feel some play at the top of the pedal, so I don't know if that could be it.

Any help is appreciated.

06-16-2019, 02:35 PM	#1
marc-s13 Join Date: Jun 2017 Location: Canada Age: 20 Posts: 47 Trader Rating: (0)	S13 Brake Swap Sticking (R32 GT-R) Here's the specs of everything: 1990 S13 Hatch (ABS) S13 Automatic brake booster Z32 Master R32 GT-R non brembo front brakes Chasebays braided SS conversion lines I bled the two fronts and the abs module yesterday. There is no air in the lines. When the car is rolling in neutral and I cut the engine, I can hear the pad rubbing on the rotor. There's no gap between the pad and the rotor ever. The pistons don't want to retract. I took the pads out, and had a friend press the pedal a bit. The pistons do not compress evenly. I tried greasing the slider pins, but it didn't help, and that's not the issue if the pistons still didn't retract with the pads out. Few things I think could be the problem: - I rebuilt them wrong (I don't know... both sides? Seems unlikely to me. I think I did it correctly) - I was using old brake fluid (not previously used, just sitting for a while) - Maybe there's still some air in the system? Don't know how this could be... Maybe I didn't let the caliper fill properly. - Maybe my automatic booster is the issue - Unadjusted push rod on booster? Still feel some play at the top of the pedal, so I don't know if that could be it. Any help is appreciated.