DIY Brake Change Query

[AlexAAA]

Hi All,


I'm writing in relation to my 2006 3.0 A6 Allroad. Time has come to change the rear discs and pads. I've done this job countless times on other vehicles and am OK with the release of the EPB (I have VAGCOM) etc. but am hoping that someone can clarify the CORRECT procedure for this job, especially when it comes to pushing the caliper piston back.


Now, most mechanics I speak to simply say, take the cap of the brake fluid reservoir and push the piston back, using a screwdriver or appropriate tool. Now ordinarily that's what I'd have expected although when I last referred to a well know car repair manual (all be it for a different make/model) it stated that when pushing the piston back in it was ESSENTIAL that the hose be clamped and the bleed nipple opened. It was stated that this was to ensure no seals were 'flipped' by the back-flow of fluid and so that none of the contaminated fluid from the caliper found it's way back into the system which could cause issues/damage to sensitive ABS components.


Can ANYONE clarify what is the correct procedure as it's driving me nuts not being able to find a definitive answer to this one?


Thanks,


Alex

[VAG-Abound]

The general VAG procedure is to ensure that fluid reservoir is not so full that fluid "returned" from pressing caliper back will cause overspill - so full expectation that lines will be open. Some / many lines are not just rubber, they have a braided structure and will be damaged if clamped.

[swalker]

wasnt a french car by any chance was it?
regardless there is no pushing back of calipers releasing the epb will do that - you do need to calibrate them afterwards of course.
I used OBDeleven and had no issues.

[dan2485]

Electro-Mechanical Parking Brakes (EPB): How to do rear brakes - YouTube