Section 1 - Cylinder Block - Group 01 Cylinder Block (1-01) M11 Page 1-9 Lubricating oil pump alignment dowel pin Cam Follower Studs - Removal Use a 11 to 13 mm [7/16 to 1/2 inch] stud extractor to remove the seven cam follower studs. Idler Shaft Ring Dowels - Removal Use puller kit, Part No. 3375784, to remove the three idler gear ring dowels. Cleaning Caution: Do not damage the machined surfaces when using a wire brush or gasket scraper. Use a Scotch-Brite W pad, emery cloth, or gasket scraper to clean the following cylinder block areas: Gasket surfaces Cylinder liner bores