manios

iTrader: (3)

I recently did complete brake service on stock system on a FD. While testing, the brakes locked up mid way through and would not release. Anybody have a idea what went wrong?

Mahjik

iTrader: (1)

Can you describe in a little more detail what the "complete brake service" consisted of?

MSilk

iTrader: (1)

I agree we need more info,
I just changed rotors and made the mistake of putting the rear caliper pins in the wrong way (one is marked L and one G, L goes in the bottom G goes in the top) and the rear calipers would not release.

Mike

manios

iTrader: (3)

New rotors, new lines, and rebuilt calipers. It was happening before the service, I can't figure it out!

bob13bt

iTrader: (9)

Master cylinder not releasing properly, or a proportioning valve problem. When you say locking up, do you mean all 4 wheels at the same time, fronts only, rears only?

Mahjik

iTrader: (1)

Have you verified your brake pedal is adjusted properly so it's not forcing pressure on the master cylinder (MC) piston while your foot is not on it? There is a page in the FSM on adjusting the mechanisms which interact with the MC piston.

Do you have the springs installed properly for the brake pads?

manios

iTrader: (3)

Everything is installed properly. I just took it for another test drive and it was fine. Once I parked it, the pedal was hard with no movement. Started it up, put it in gear and all brakes locked car didn't move! The brakes loosen up after a few hours.

bumpstart

pedal is adjusted past the equalisation return port in the master

back off the pedal adjust

manios

iTrader: (3)

master cylinder was bad! Thanks for the help.

Dr.poop

glad you fixed it!