PaulR
Wednesday 1st January 2014, 18:34
Hi All,
Hope someone can help. Have just changed the front pads on my 2007 C70. Slowly compressed the pistons back with the reservoir cap off as I have always done. Everthing went fine and the brake pedal was solid initially but as soon as I started the engine, creating vaccum assist, the pedal went soft and I had to pump it. After doing this a number of times there was a small loss of brake fluid from the reservoir. When leaving the car for a while, allowing the vaccum to dissipate, the brake pedal returned to normal again, solid. Starting the engine made it spongy again. Tried the brakes on gravel and the ABS kicked in fine.
Have already done some research and aware that some people recommend opening the bleed valve when retracting the piston to avoid flipping the seal on the MS. Other people seem to regard this as an 'urban myth'.
I intend bleeding the brakes but not having opened the hydraulics at all, I am not optimistic of this solving the problem.
Any advice would be very welcome.
PaulR (new member)
Hope someone can help. Have just changed the front pads on my 2007 C70. Slowly compressed the pistons back with the reservoir cap off as I have always done. Everthing went fine and the brake pedal was solid initially but as soon as I started the engine, creating vaccum assist, the pedal went soft and I had to pump it. After doing this a number of times there was a small loss of brake fluid from the reservoir. When leaving the car for a while, allowing the vaccum to dissipate, the brake pedal returned to normal again, solid. Starting the engine made it spongy again. Tried the brakes on gravel and the ABS kicked in fine.
Have already done some research and aware that some people recommend opening the bleed valve when retracting the piston to avoid flipping the seal on the MS. Other people seem to regard this as an 'urban myth'.
I intend bleeding the brakes but not having opened the hydraulics at all, I am not optimistic of this solving the problem.
Any advice would be very welcome.
PaulR (new member)