TM-5-4310-389-14 Table 4-4.  Cylinder Head (Continued) Dimension Tolerance (min./max.) Item Inch (mm) Inch (mm) Intake Valve Seat Outside Diameter - Oversize (3 increments of .1 mm) 1.7976 (45.66) -0.0008 -(.02) Intake Valve Bore in Cylinder Head (Nominal) 1.7913 (45.5) +0.0010 +(.025) Exhaust Valve Seat Outside Diameter (Nominal) 1.5811 (40.16) -0.0008 -(.02) Exhaust Valve Seat Outside Diameter - Oversize (3 increments of .1 mm) -0.0008 -(.02) Exhaust Valve Seat Bore in Cylinder Head (Nominal) 1.5748 (40.0) +0.0010 +(.025) Valve Seat with Intake/Exhaust 0.0591 (1.5) +0.0197 +(.5) Valve Seat Intake Diameter 1.6929 (43.0) ±0.0039 ±(.1) Valve Seat Exhaust Diameter 1.4567 (37.0) ±0.0039 ±(.1) Seat Angle Intake and Exhaust 45° Rim Thickness: Intake 0.0394 (1.0) -0.0079 -(.2) Exhaust 0.0591 (1.5) -0.0079 -(.2) Wear Limit: Intake 0.0197 (.5) 0 Exhaust 0.0197 (.5) 0 Valve Recess (Intake and Exhaust) 0.1999 (5.078) 0 Valve Recess Limit (Intake and Exhaust) 0.2237 (5.681) 0 Cylinder Head Height With Shim 0.2520 (6.4) Without Shim 0.2480 (6.3) Valve Spring Total Windings 7 Unloaded Length (normal) 2.3228 (59.0) ±0.0748 ±(1.9) Unloaded Length (fatigue limit) 2.2047 (56.0) Length of Cylinder Head Studs (nominal) 8.3071 (211) ±0.0197 ±(.5) Length of Cylinder Head Studs (Maximum) 8.3661 (212.5) ±0.0197 ±(.5) 4-9