TM5-6115-585-34 NAVFAC  P-8-262-12 TO-35C2-3-455-2 TM-05684C-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  head 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 45º N/A 45º Valve  Face  Angle 45° N /A 45° VALVE  GUIDE: Length Exhaust 2 Intake 1-25/32 Outside   diameter 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