Using depth gauge, BMW # 00 2 550, measure distance «a».
Place measuring ring, BMW # 33 2 601, in position and secure it.
Measure from the outer ball bearing race through the cutout in the measuring ring to the housing mating face and calculate distance «b».
Distance «a» - distance «b» = shim thickness (without preload).
Apply a light coat of grease to the selected shim washer, and install it.
Preload: 0.05...0.1 mm (0.0020...0.0039 in)