ARMY TM 9-2805-257-14 AIR FORCE TO 38G2-103-2 NAVY NAVFAC P-8-612-14E Table 6-2. Engine Repair and Replacement Limits (cont). Measurements Item Minimum Maximum VALVE  TAPPETS Outside  dia. 0.4974 0.4979 (0.2633) (0.2646) Clearance  in  guide 0.0006 0.0018 (0.0015) (0.0045) Tappet  guide  i.d. 0.4987 0.4992 (1.2666) (1.2679) Rocker  arms Rocker arm i.d. 0.6245 0.6255 (1.5862) (1.5887) Rocker shaft o.d. 0.4375 0.4380 (1.1112) (1.1125) Rocker  arm  bearing 0.4380 0.4383 i.d. in rocker arm (1.1125) (1.1132) 6-19/(6-20   blank)