Engine Assembly (0-02) Section 0 - Engine Disassembly and Assembly - Group 00 M11 Page 0-76 Use piston ring expander, Part No. ST-821, to install the rings on the piston. The top piston ring is a positive twist design that has a cutback notch on the top side of the ring. The intermediate ring is a negative twist design with a cutback notch on the bottom side and a two degree taper face. It also has a black phosphate coating which helps to readily distinguish it from the top ring. Piston and Connecting Rod - Installation Use a clean ‘‘lint free’’ cloth to clean the connecting rods and bearing shells. Do not lubricate the back of the bearing shells.
The operating clearance of the bearing will be reduced and the bearing can be damaged during engine operation. If new bearings are not used, the used bearings must be installed on the same connecting rod from which they were removed. Install the upper bearing shell into the connecting rod. The tang of the bearing shell (1) must be in the slot of the rod (2). The end of the bearing shell must be even with the cap mounting surface. Use Lubriplate W 105, or equivalent, to coat the bearing shell. Apply a heavy film of 15W-40 oil to the cylinder liner bore.