TM 10-3930-669-34 (6) Fit valve stem seals (5) and, using a micrometer, measure valve spring (4) length.  If measured   value   is   not   between   2.2047   inch (56.0000  mm)  and  2.3976  inch  (60.9000  mm), replace valve springs. (7) Inspect  valve  rotators  (6)  and  spring  caps  (3) for   damage.      Make   sure   valve   rotators   work freely.  Replace valve rotators  and  spring  caps if damaged. (8) Inspect  inlet  and  exhaust  valves  (7  and  8)  for cracks and pits.  Replace as required.  Reface valves   if   required   and   inspect   to   tolerances specified in Table 3-1. (9) Check  clearance  of  valve  stems  (14)  in  valve guides  (15)  of  inlet  and  exhaust  valves  (7  and 8).    If  clearance  exceeds  0.0059  in.    (0.1500 mm) for inlet  valve  or  0.0079  in.    (0.2000  mm) for exhaust valve, replace guides. (10)   Check inner diameter clearance of valve guides (15)  (pressed  in).    If  inner  diameter  clearance exceeds 0.3155 in. (8.0150 mm), replace valve guides. 3-45