Withdrawal
1. Jack up the vehicle and place it securely on axle stands. Remove the engine tray.
2. On E28 models («retro») discharge the hydraulic system by depressing the brake pedal approximately 20 times.
3. Disconnect the return line hose and drain the fluid from the reservoir into a clean container. Disconnect the inlet line from the pump.
4. If you need to remove the pulley from the pump, tighten the pump drive belt by hand and loosen the pulley nuts or bolts.
5. Loosen the steering pump drive belt tensioner bolt and remove the belt (see chapter Car maintenance).
6. Give fixing bolts and remove the steering pump.
Typical steering pump mounting bolts are indicated by arrows.
Installation
1. Install in reverse order. Tighten nuts and bolts securely. Adjust drive belt tension (see chapter Car maintenance).
2. Add liquid to the reservoir to the correct level (see chapter Car maintenance) and pump the system (see Section Bleeding the hydraulic system of the power steering mechanism).