Checking Power Steering

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 BMW M5, 2002 BMW 540i, 2001 BMW M5, 2001 BMW 540i, and 2000 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Limit steering lock 1/2 - 3/4 steering wheel turns before reaching the left limit stop (wood etc.). See Fig 1.
Open valve (B).
Close valve (A).
Start engine.
Pull steering wheel with special tool (64 1 100) at 22.5 Lbs. (100 N) for approximately 5 seconds against left lock and read off pressure. See Fig 2.
Limit right stop and measure at right limit position.
Replace steering gear if the pressures are below the previously determined pump pressure.
Remove special tool (32 4 000) and replace sealing rings on banjo bolts. Tighten lines to specification. See TORQUE SPECIFICATIONS .
Bleed hydraulic system. See BLEEDING POWER STEERING SYSTEM .

Fig 1: Limiting Steering Lock

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Using Special Tool (64 1 100)

Courtesy of BMW OF NORTH AMERICA, INC.