I replaced the left rear caliper today because the old one was weeping fluid from the piston. The new caliper isn't braking as effectively as the old one. Does it need to bed in? Discs are well within the wear limit and the pads are only 25% worn, so I refitted them. Replaced both banjo bolt washers, everything is tightened to the specified torque, all brake lines have been bled. The nobble on the inner pads are slotted into the pistons. Before I went for a test drive I turned the wheels by hand while the rear was still up on stands and the handbrake mechanism is moving the piston, as is the brake pedal, but the handbrake isn't holding the left wheel as well as the right. I went out for a short test drive, when I got back the right hand disk was warm, borderline hot, but the left disk was just warm. I've double checked my work and the only conclusion I've arrived at is that, because it's a new caliper, the seals are tight and everything just needs to beds in over the course of some miles and some hot/cold cycles. Is this the case? Any comments welcome, thanks.