DpetersVolvo
New member
- Joined
- Nov 5, 2015
- Location
- Falmouth, MA
1985 B21FT.
Replaced both front calipers with rebuilt; front drivers side not releasing all the way - after driving a bit the wheel heats up and you can feel the car won't glide like it should.
Popped out the brake pads and the lower two pistons will not retract together - if you push in on one, the other pops out, but if you hold one the other cannot be forced back in. Uppers are fine. Also the bleeders for the lowers don't bleed much.
I loosened the lower line and the pistons both retract normally, with fluid squirting out at the nut. Same if I open the bleeders. So the fluid is not flowing back to the MC.
Suspected it might be the junction block, but reading here it seems like this is not a failure mode associated with that fine part. I find it kind of hard to believe the line would stop up enough to prevent the brake from releasing, but could it be anything else?
Replaced both front calipers with rebuilt; front drivers side not releasing all the way - after driving a bit the wheel heats up and you can feel the car won't glide like it should.
Popped out the brake pads and the lower two pistons will not retract together - if you push in on one, the other pops out, but if you hold one the other cannot be forced back in. Uppers are fine. Also the bleeders for the lowers don't bleed much.
I loosened the lower line and the pistons both retract normally, with fluid squirting out at the nut. Same if I open the bleeders. So the fluid is not flowing back to the MC.
Suspected it might be the junction block, but reading here it seems like this is not a failure mode associated with that fine part. I find it kind of hard to believe the line would stop up enough to prevent the brake from releasing, but could it be anything else?