bassboost

iTrader: (2)

I'm having issues with my front brakes, 2 days ago I was driving normally then suddenly the front brakes slowly started to lock up? It wasn't to the point where the vehicle was not able to move, but the engine had to work hard to move the car. I let the car sit for about 10minutes, then all was fine again.

I checked the lines, and both lines running from the body to the shock bracket have a slight drip. The calipers are not leaking. Then today, the brakes locked up again, so I let the vehicle sit again, and went to pull out and noticed that my brake pedal has no pressure now? It doesn't stay to the floor, however no matter how much pumping you do it has no pressure.

The question I guess I'm asking is, should I suspect the leaky lines are causing this? Or the master cylinder?

Vehicle is a 1988 T2 with the 4pot front calipers w/drilled-slotted rotors,new pads,and rebuilt calipers.

Thank you

Pele

iTrader: (28)

You say the calipers are rebuilt... I'm going to assume they are not leaking or seized. You may want to double check this though. Who rebuilt them, you or did you get them rebuilt from a store?

How was the pressure when you originally bled the brakes after replacing the calipers? You may have a bad master cylinder.

I'd also look into the brake lines. I've seen them fail where the inner liner start degrading and gets caught up in the line, acting like a check valve. Fluid can go into the caliper, allowing it to grab, but fluid will not return properly, resulting in stuck or dragging brakes.

The brake lines are cheap and easy to do. I usually do them when I replace a caliper, especially if they're the cheap rubber ones. Stainless, it's best to replace every few years or so.

bassboost

iTrader: (2)

Well, unfortunately I did not rebuild these calipers, the previous owner did. The lines that are on there now are the braided brake lines. I checked the calipers, they did not appear to be leaking anywhere or seized.

I figured I'd need to replace the lines just due to the leak, but would they cause the sudden loss in all brake pressure as well? Before any of this happened, the brakes worked perfectly, with a good feeling pedal at all times, until just recently when they started to lock up suddenly. Which is also when I noticed the lines leaking.