Today I had an hour spare so I stripped down my rear brake calipers for reconditioning.
I’m using e46 328i rear brakes.
My scope is to strip down/clean/repaint.
I bought new pistons, hydraulic seals and dust protection seals from BMW.
First step was to remove the piston.
Easily done if piston is not corroded!
Once you pull out 3/4. The dust protection seal can be popped out of the piston groove.
After removing piston and dust protection seal.
The Hydraulic seal can be seen. It sits in the second groove towards rear.
At this point you clean both grooves. Depending on level of corrosion. Wire brush attachment for drill can be used.
Once all cleaned. You are ready to reassemble!
Ensure to use either assembly lube or brake fluid.
I’m going to be sandblasting and repainting my calipers.
Once I’ve finished doing that,
I will post pictures when reassembling.