Cam Follower Assembly - Rebuild (4-02) Section 4 - Cam Follower Assembly - Group 04 M11 Page 4-12 Assembly Apply a coat of cup plug sealant, Part No. 3375068, to the outside diameter of the shaft plugs. Install the shaft in an arbor press. NOTE: Make sure the end of the shaft is supported. Press the plug into the shaft until it is level with the end of the shaft. Use clean 15W-40 oil to check the oil flow through the cam followers. Use clean 15W-40 oil to lubricate the cam follower shafts, and the injector and valve cam followers.