TM   9-2815-202-34 (4)  Check  used  liner  for  taper  and  out  of  round.  Liner  taper  is  difference  between  O.D.  at  0.625 and 9.875 inches positions. Taper must not exceed 0.002 inch and out of round must not exceed 0.0025 inch. If out of round exceeds 0.0025 inch, rotate liner 90 degrees in block bore  and  recheck. NOTE Liners,  standard  and  oversize,  have  an  inside  diameter  of  4.2489  to  4.2511  inches. Liners  are  available  in  0.005,  0.010,  0.020,  0.030  inch  oversize  on  outside  diameter. (5) When an oversize liner is installed, stamp amount of oversize on top of cylinder block bore adjacent  to  liner  counterbore. e.  Honing CAUTION Do not modify surface finish of new liner. Liner is properly  finished  at  factory  so  changes  will  adversely affect piston ring seating. NOTE Used cylinder liners must be honed to break glaze resulting  from  extended  operation  and  to  remove ridge formed at top of piston ring travel. If glaze is not removed, time required to seat new piston rings will be lengthened. A  scrap  cylinder  block  makes  an  excellent  honing fixture. (1) Place liner in fixture (6). CAUTION If  liner  is  honed  in  block,  completely  dismantle  engine to  insure  all  abrasive  material  is  cleaned  out. (2) A hone (7) equipped with 120 grit stones should be worked up and down full length of liner a few times to produce a crisscross pattern of hone marks on 45 degree  axis. WARNING Compressed  air  used  for  cleaning  purposes will  not  exceed  30  psi.  Use  only  with  effective chip  guarding  and  personal  protective equipment   (goggles/shield,   gloves,   etc). (3) Remove liner from fixture and clean thoroughly. Dry with  compressed  air  and  check  surface  for  burrs. 4-147