Q7 Quattro V8-4.2L (BAR) (2008)
Brake Caliper: Overhaul
Rear Brake Caliper Piston
Rear Brake Caliper Piston
Special tools, testers and auxiliary items required
‹› Wedge (3409)
‹› Piston resetting tool (T10145)
Removing
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Force piston from brake caliper housing, one at a time, using compressed air.
Only one piston can be pressed out at a time. Secure opposite piston in brake caliper housing using piston resetting tool - a -. Block the other pistons,
e.g. using wood blocks - b -. In addition, place a wooden board - c - in front of the piston resetting tool so that the piston will not be damaged when
pressed out.
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Remove seal with Trim Removal Wedge (3409).
When removing, make sure that surface of cylinder is not damaged.
Installing
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The surface of the piston and seal must only be cleaned with mineral spirits and then dried.
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Thinly coat piston and seal with assembly paste (G 052 150 A2) before inserting.