ARMY TM 9-2815-259-24 AIR FORCE TO 38G1-125-2 MARINE CORPS 09249A/09246A-24 5-117 Table 5-12.  Valve Seat Insert Bore Specifications Item Specification Exhaust A 1.6924 - 1.6934 in. (42.987 - 43.013 mm) B 0.150 in. (3.82 mm) Reference C 0.3912 - 0.3962 in. (9.936 - 10.064 mm) D 38 - 42° E Maximum Radius 0.019 in. (0.5 mm) Maximum surface finish bore "A" 0.000062 in. (0.00158 mm) Intake A 1.8545 - 1.8555 in. (47.104 - 47.130 mm) B 0.136 in. (3.45 mm) Reference C 0.3912 - 0.3962 in. (9.936 - 10.064 mm) D 38 - 42° E Maximum Radius 0.019 in. (0.5 mm) Maximum surface finish bore "A" 0.000062 in. (0.00158 mm) Replacement Valve Seat Insert OD: Exhaust 1.8565 - 1.8575 in. (47.155 - 47.181 mm) Intake 1.6944 - 1.6954 in. (43.038 - 43.064 mm) FIGURE 5-95.  VALVE INSTALLATION