Marking the ABS sensor ring
- Remove rear wheel.
- Remove the ABS sensor.
- Secure dial gauge holder, BMW No. 00 2 500, with dial gauge, BMW No. 00 2 510, extension, BMW No. 00 2 661, and measuring shoe, BMW No. 34 2 510, to tapped bores for ABS sensor fasteners.
- Zero the dial gauge.
- Measure radial runout round the entire circumference of the ABS sensor ring.
Caution: If replacement parts are fitted, the sensor ring must be re-marked; remove the old mark.
- With a paint pencil, make a permanent mark at the point on the ABS sensor ring at the greatest distance from the ABS sensor.
- Installation is the reverse of the removal procedure: pay particular attention to the following.
- Check/adjust ABS sensor gap.
Tightening torque:
- ABS sensor — 4 Nm
Checking/adjusting ABS sensor gap
Checking ABS sensor gap
- Align the marked point on sensor ring (1) with ABS sensor (2).
- Use ABS feeler gauge (arrow) to check the gap between the ABS sensor and the sensor ring.
Adjusting ABS sensor gap
- Slacken ABS sensor.
Caution: After adjusting, check clearance of the ABS sensor round the entire circumference of the sensor ring.
- Adjust sensor gap with spacing plate (3) and recheck.
- ABS sensor gap — 0.45...0.55 mm (0.018...0.022 in)
Tightening torque:
- ABS sensor mount — 4 Nm
