e .
f .
g .
h.
i .
j .
k.
l .
m.
TM 10-4320-344-24
Ensure 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 assembly
grease.
Refer to tags and position center main bearing cap (2) and six main bearing
caps (5) over crankshaft (7).
Remove and discard tags.
Install four bolts (1) in center main bearing cap (2) and twelve bolts (4) in
main bearing caps (5).
Hand-tighten bolts (1 and 4).
Using soft hammer, sharply rap center main bearing cap (2) and six main
bearing 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 required
torque limits.
Starting in the center and working alternately towards both ends of the engine
block, progressively torque bolts (1 and 4) to torque values defined in
Table 4-14.
Table 4-14.
Torque Values.
n.
o .
Bolts
9/16 inch (14.29 mm)
bolts for main
bearing caps (5)
1/2 inch (12.70 mm)
bolts for center
main bearing cap (2)
TORQUE BOLTS (1 AND 4) TO:
"T" Stamped Caps
Plain Caps
130 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 thrust
bearing (2) and crankshaft (3).
(2) Minimum allowable clearance is 0.005 inches (0.127 mm). Maximum allowable
clearance 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 0.005
inches (0.127 mm), remove crankshaft (3) and using emery cloth polish center
thrust bearing (2) until proper clearance is obtained.
4-69
