TM  5-6115-584-34 NAVFAC P-8-622-34 TO-35C2-3-456-2 TM-0568C-34 Table  1-2.  Repair  and  Replacement  Standards  (Cont) Manufacturer   Dimensions and  Tolerances Maximum Allowable Component Minimum Maximum Wear  Limit PISTON  RING  (Cont): Clearance in groove - oil control 0.0020 0.0030 0.0050 Gap 0.0100 0.0200 0.0400 VALVE, INTAKE: Head  diameter 1.307 1.317 N/A Stem diameter - tapered 0.3391/0.3381 0.3420/0.3410 0.002 Stem to guide clearance 0.0030/0.0050 0.0012/0.0032 0.0100 Stem to rocker arm clearance Cold 0.010 0.010  adjustable Seat diameter in head 1.361 1.362 N/A Seat width in heed 1/16 3/32 1/8 Top  of  valve  recessed  below 0.433 0.439 0.500 cylinder  head  deck Valve seat angle 45° N/A 45° Valve  Face  Angle 44° N/A 44° VALVE,  EXHAUST: Head  diameter 1.307 1.317 N/A Stem  diameter 0.3405 0.3415 0.002 Stem to guide clearance 0.0030 0.0050 0.0100 Stem to rocker arm clearance Cold 0.007 0.007  adjustable Seat diameter In head 1.361 1.362 N/A Seat width in head 3/64 1/16 1/8 Top  of  valve  recessed  below 0.433 0.439 0.500 cylinder  head  deck Valve seat angle 45° N/A 45° Valve  Face  Angle 45° N/A 45° VALVE GUIDE: Length Exhaust 2 Intake 1-25/32 Outside dtameter 0.4690 0.4695 0.4695 Bore diameter - intake - ream 0.3425 0.3435 0.003 Bore diameter - exhaust - ream 0.3445 0.3455 0.003 Height above cylinder head deck Intake 11/32 N/A Exhaust 5/8 N/A 1-6