Removal and installation the rear wheel brake disc (BMW 5 Series E34)

Removal

Remove the rear wheel brake caliper.



Unscrew the "arrow" mounting bolt with a 5 mm open-end wrench.

Release the parking brake completely.

Remove the brake disc. If the brake disc cannot be removed, separate the parking brake pads.

Installation

To ensure uniform braking on both sides, the surfaces of both discs must be identical in surface cleanliness and treatment. Therefore, both discs must be replaced or treated simultaneously.

The service station can check the disc runout. Maximum lateral runout (in the installed position): 0.2 mm.

Measure the thickness of the disc.

Clean new disks with nitro solvent to remove protective varnish.

Place the brake disc on the wheel hub and secure with a bolt. First, turn the brake disc so that the holes for the bolt align.

Install the brake caliper with the brake pads inserted. Do not stretch or twist the brake hose. Check the freedom of movement of the brake hose when turning the steering wheel from lock to lock.

Secure the brake caliper with a bolt tightening torque of 120 Nm. Pre-coat the bolt threads with engine oil.

Caution: If the brake hose has come loose, it is necessary to bleed the air from the brake system.

Install the wheel observing the marking of the disk position on the hub. Lower the car and crosswise. Tighten the wheel bolts with a torque of 110 Nm.

Caution: With the vehicle stationary, press the brake pedal several times until you feel a noticeable resistance.

Check the brake fluid level in the expansion tank and, if necessary, top up the fluid to the MAX mark.

Break in new brake discs.

Phase

• 1: 5 hard brakings at 50 km/h on a road with light traffic.
• 2: Allow the brakes to cool.
• 3: Another 5 hard brakings at 50 km/h.