Cleaning & Inspection
Clean all parts in alcohol and inspect for wear or damage. Master cylinder bore diameter is .812" (20.64 mm) on 318i and 320i; .938" (23.81 mm) on 528e, 533i and 633CSi; and .875" (22.23 mm) on 733i.
NOTE:
Cylinders with surface defects in bores must be replaced. Do not overhaul.