Section 8 - Cooling System - Group 08 Fan Idler Pulley - Rebuild (8-06) M11 Page 8-37 Measure the inside diameter of the idler pulley bearing bores. Front and Rear Bearing Bores I.D. mm in 45.199 MIN 1.7795 45.224 MAX 1.7805 Assembly Install the idler pulley in an arbor press with the mounting flange facing down. Use the bearing driver, Part No. 3375696, to press the front bearing race (1) into the pulley until it touches the spacer ring. Turn the pulley over with the mounting flange facing up in the arbor press. Use the bearing driver, Part No. 3375696, to press the rear bearing race (2) into the pulley until it touches the spacer ring.
Use clean Chevron SRI, or equivalent to lubricate the front and rear bearings. NOTE: Fill the space between the two bearings with grease when assembling the idler pulley.