|
Hi David,
Firstly I'll state my credentials. I've been a mechanic for 20years and still am.
The block you are taking about that the lines from the master cylinder go too is indeed the ABS module. There is no need to be scared by these systems if you are competent with older systems. Mercedes Benz Sensotronic Brake Control is a prime example of a system you shouldn't touch unless you absolutely understand the system but your sister-in-law's Kia is still much like 90% of cars on the road. The ABS pump and module simply creates reserve pressure to be able to interrupt brake pressure and return it as it pulses the brake system during loss of traction with wheel lock up or to a specific caliper to assist in controlling the vehicle if it has Stability Control. Essentially when you are not in either of those situations, the block simply acts as a fluid pressure distributor.
As has been stated, the only thing you really want to avoid is introducing air to the system by not keeping the resivior topped up while you're bleeding them. The ABS pump then becomes a pain in the bum to bleed. Not impossible and certainly easier to pressure fill but not a concern if you avoid air ingress to start with.
As with older systems, start bleeding from the caliper furthest away from the brake master cylinder and work towards the closest.
As has also been stated though, it's brakes, be careful and if you're not 100% confident, get a mechanic to take care of that bit for you.
2mm of the rear pads - yes it's time to change them. Again something you may not have come across before is hand brakes that operate on the caliper. The Kia may or may not have these. If it does, the wind back procedure is totally different to a normal caliper...... But that's a story for another day.....
Ryan
|