e .f .g .h.i .j .k.l .m.TM 10-4320-344-24Ensure timing marks of crankshaft gear and camshaft gear are aligned.Using sling, carefully lower crankshaft (7) into engine block.Install six new lower main bearings (6) in the main bearing caps (5).Install new lower center main bearing (3) in center main bearing cap (2).Coat all bearing caps (2 and 5) and bearings (3 and 6) with engine assemblygrease.Refer to tags and position center main bearing cap (2) and six main bearingcaps (5) over crankshaft (7).Remove and discard tags.Install four bolts (1) in center main bearing cap (2) and twelve bolts (4) inmain bearing caps (5).Hand-tighten bolts (1 and 4).Using soft hammer, sharply rap center main bearing cap (2) and six mainbearing caps (5) to properly seat them.Check center main bearing cap (2) and six main bearing caps (5) for a “T”stamped on the side opposite the cylinder number to determine the requiredtorque limits.Starting in the center and working alternately towards both ends of the engineblock, progressively torque bolts (1 and 4) to torque values defined inTable 4-14.Table 4-14.Torque Values.n.o .Bolts9/16 inch (14.29 mm)bolts for mainbearing caps (5)1/2 inch (12.70 mm)bolts for centermain bearing cap (2)TORQUE BOLTS (1 AND 4) TO:"T" Stamped CapsPlain Caps130 ft-lbs (176 N•m)80 ft-lbs (109 N•m)100 ft-lbs (136 N•m)80 ft-lbs (109 N•m)Ensure crankshaft (7) rotates freely.Check end shaft thrust of crankshaft (7) as follows:(1) Using feeler gauge (Figure 4-35, 1), measure distance between center thrustbearing (2) and crankshaft (3).(2) Minimum allowable clearance is 0.005 inches (0.127 mm). Maximum allowableclearance is 0.015 inches (0.381 mm).(3) If clearance is less than 0.005 inches (0.127 mm), remove crankshaft (3),clean all components as necessary, and reinstall crankshaft (3).(4) Repeat step 4.4.19.3.0.(1) above. If clearance is still less than 0.005inches (0.127 mm), remove crankshaft (3) and using emery cloth polish centerthrust bearing (2) until proper clearance is obtained.4-69
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