TM 5-3805-255-14
0095
VALVE RECONDITIONING CONTINUED
Intake and Exhaust Valve Specifications
00095
ITEM
SPECIFICATIONS
Intake Valves
Stem Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4350 to 0.4360 in. (11.049 to 11.074 mm)
Minimum Permissible Stem Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4335 in. (11.011 mm)
Port Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 in. (38 mm)
Head Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.700 to 1.710 in. (43.18 to 43.43 mm)
Stem Clearance in Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0015 to 0.0040 in. (0.38 to 0.102 mm)
Maximum Permissible Stem Diameter (Clearance Allowed Before Reconditioning) . . . . . 0.0070 in. (0.178 mm)
Valve Face Angle (Degrees) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 degrees - 0' to 29 degrees-45'
Valve Seat Angle in Cylinder Head (Degrees) . . . . . . . . . . . . . . . . . . . . . 30 degrees - 0' to 30 degrees-15'
Valve Head Protrusion from Cylinder Head Face (New) . . . . . . . . . . . . 0.020 to 0.032 in. (0.50 to 0.81 mm)
Minimum Allowable Protrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.010 in. (0.25 mm)
Valve Lash Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.020 in. (0.50 mm)
Valve Seat Insert Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.778 to 1.779 in. (45.16 to 45.19 mm)
Valve Margin (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50% of a New Valve
Exhaust Valves
Stem Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4350 to 0.4360 in. (11.049 to 11.074 mm)
Minimum Permissible Stem Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4335 in. (11.011 mm)
Port Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 in. (38 mm)
Valve Seat Insert Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.778 to 1.779 in. (45.161 to 45.187 mm)
Head Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.700 to 1.710 in. (43.43 mm)
Stem Clearance in Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.0015 to 0.0040 in. (0.038-0.102 mm)
Maximum Permissible Stem
Clearance Allowed Before Reconditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0070 in. (0.178 mm)
Valve Face Angle- Degrees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 degrees - 0' to 45 degrees-15
Valve Seat Angle in Cylinder Head from Valve Center Line (Degrees) . . . . . . 45 degrees - 0' to 44degrees-45'
Valve Head Protrusion from Cylinder Head Face (New) . . . . . . . . . . . . . . . 0.020 to 0.032 in. (0.50 to 0.81 mm)
Minimum Allowable Protrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.010 in. (0.25 mm)
Valve Lash Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.031 in. (0.79 mm)
Valve Margin (Minimum) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50% of New Valve
0095-13
