TM 10-3930-653-14&P (2)   INSPECTING CAMSHAFT JOURNALS Check   the   camshaft   journals   for   damage,   out-of- roundness,   etc.   and   correct   or   replace,   as   required. (Measure    with    a    micrometer).        If    excessively    worn beyond  service limit, grind to prescribed undersize. Fig. 4-66.  Inspecting Camshaft Journal Correct to Service (out-of- within round/taper) limit Degree of taper or out-of-round (eccen- 0.01 (0.0004) 0.03 (00012) tricity) of camshaft Journals mm (in) Journal wear mm (in) 0.05 (0.0020) Fig. 4-67.  Inspecting Cam Surface (3)   INSPECTING CAM SURFACES Inspect  the  cam  surfaces.    If  the  cam  surfaces  are excessively damaged or if cam height has been reduced (worn) by 0.25 mm (0.0098 in) or more.  replace the cam with a new one. Camshaft lobe lift: 37.229 to 37.279 mm (1.4657 to 1.4677 in) (4)   INSPECTING DRIVE GEAR Inspect  the  distributor  and  oil  pump  drive  gear.    If excessively    worn    or    damaged,    replace    the    gear    or camshaft with a new one. (5)   VALVE TIMING This diagram applies to all cylinders.  If any valve is found out of specifications, one possibility is that the cam lobe is worn or damaged.  This calls for replacement  of the camshaft. Fig. 4-68. (6)   CAM BUSHING (1)   Inspecting cam bushing Inspect     the     cam     bushing     for     binding,     fusing, improper  contact,  etc..    and  if  faulty,  select  a  suitable replacement   from   the   service   parts   and   replace   the bushing. 4 - 39