ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
Thoroughly clean all corrosion and lime deposits from -ring bore.
Measure cylinder block as follows:
Measure main bearing bore diameter, refer to FIGURE 3-157. Main bearing bore diameter must be 3.325
to 3.326 inches (84.46 to 84.48 mm).
Measure engine block main thrust bearing width. Width must be 1.3235 to 1.3275 inches (33.62 to 33.72
If bearing caps are damaged, or bore is not within specification, replace cylinder block.
FIGURE 3-157. Measuring Main Bearing Bore bitter
Replacement bearing caps are supplied with bearing bore unfinished.
Measure cam follower bore diameter, refer to FIGURE 3-158. New diameter is 1.248 to 1.250 inches
(31.70 to 31.75 mm). If diameter is more than specified, install a new engine block. Service bushings are
not available. New cam follower diameter is 1.245 to 1.246 inches (31.62 to 31.65 mm). Maximum cam
follower clearance is 0.005 inch (0.13 mm)
FIGURE 3-158. Measuring Cam Follower Bore Diameter
Measure camshaft bore diameter, refer to FIGURE 3-159. Mew diameter is 2.204 to 2.2-5 inches (55.98 to
56.01 mm). If diameter is more than specified, install a new engine block. New camshaft journal
clearance (camshaft bore ID minus camshaft journal OD is 0.003 to 0.005 inch (0.08 to 0.13 mm).
Maximum clearance is 0.006 inch (0.15 mm).