Hi guys, the rear near side brake of my '06 Tourer i-ctdi is binding despite all my efforts to cure it. I understand this is a common problem, and so far have carried out the following work:
Pads replaced
Calliper overhauled with new piston & seals
Flexible brake hose replaced
Calliper replaced
Sliding pins removed, cleaned and regressed.
Pad carrier removed and de-rusted.
Pads replaced again, filed top and bottom edges to ensure no binding in the carrier.
Brake disc replaced
Brakes bled (several times)
The pads are correct for the tourer (i.e. no pin on back) and the calliper piston moves freely, as do the sliding pins. Yet after a short drive the brakes and wheel are very hot and stinking!
I am now wondering if the abs pump is continually holding pressure on the hydraulic line to the calliper as I can't think of any other reason that would cause the brakes to bind. Has anyone ever found this is the case? I am thinking of temporarily swapping the hydraulic pipes to the rear brakes around at the abs pump to see if the fault moves to the offside brake, confirming the issue lies with the abs pump. I appreciate it will affect the operation of the abs (i.e. if one rear wheel locks up the abs will relieve pressure to the wrong wheel) but it will only be temporary to allow me to see what happens.
Finally, can anyone tell me which hydraulic connection at the abs pump goes to which wheel? The two feeds from the master cylinder as easy enough to spot but it will be a right PITA trying to trace the others!
Many thanks, Pete.
Pads replaced
Calliper overhauled with new piston & seals
Flexible brake hose replaced
Calliper replaced
Sliding pins removed, cleaned and regressed.
Pad carrier removed and de-rusted.
Pads replaced again, filed top and bottom edges to ensure no binding in the carrier.
Brake disc replaced
Brakes bled (several times)
The pads are correct for the tourer (i.e. no pin on back) and the calliper piston moves freely, as do the sliding pins. Yet after a short drive the brakes and wheel are very hot and stinking!
I am now wondering if the abs pump is continually holding pressure on the hydraulic line to the calliper as I can't think of any other reason that would cause the brakes to bind. Has anyone ever found this is the case? I am thinking of temporarily swapping the hydraulic pipes to the rear brakes around at the abs pump to see if the fault moves to the offside brake, confirming the issue lies with the abs pump. I appreciate it will affect the operation of the abs (i.e. if one rear wheel locks up the abs will relieve pressure to the wrong wheel) but it will only be temporary to allow me to see what happens.
Finally, can anyone tell me which hydraulic connection at the abs pump goes to which wheel? The two feeds from the master cylinder as easy enough to spot but it will be a right PITA trying to trace the others!
Many thanks, Pete.