That sounds damn nifty!mundy1989 wrote:Did them with a power bleeder that connects to the wheel valve and brake resivour took about 5 mins, peddle is good, brakes not so good but they will bed in soon enough, did it with engine on in case abs pump had air in too
Oh dear, can of worms, everyone talking at cross purposes and it's my fault, sorry
The seat... I think we could do with a diagram here but best I can do is
Right, the conical part on the end there screws into a hole inside the calliper to form the seal. Above that is a small hole which leads into the central part of the nipple, so when the nipple is loosened the fluid is pushed past the seal, through the little hole and out through the centre of the nipple where, hopefully, you have a tube waiting to drain it into a jar or something.
My issue with the one-way valve bleeders is that, unless the threads form a perfect seal, when the peddle is released the remaining vacuum can pull air back past the threads and into the braking system, rendering the bleeding pointless. I know this won't always happen, but it's such a nuisance when it does I've long since given up with it.
Jasper's method involves (I think) shutting the nipple, making it impossible for air to get in and the subsequent vacuum forces brake fluid past the piston seals in the m/cylinder to replenish the system. I'd also call this the "old fashioned" way, it's pretty much fool proof (unless the m/cylinder seals are shot, in which case you're wasting your time anyway). This does rather require two people though, one to pump the peddle, the other to work the nipples ( ).
And now I'm wondering how you managed to bleed that Z4's brakes on your tod, unless you have extremely long legs