ENGINE
6LPA Service Manual
5-47
Cylinder Block
12/05
© 2007 Yanmar Marine International
21. Check the main journals and bearings for
damage. If damaged, replace the bearings and
grind or replace the crankshaft as needed
(Figure 5-93).
Figure 5-93
Figure 5-93
22. Install the crankshaft on the cylinder block.
23. Attach a strip of plastigage (Figure 5-94, (1)) to
each journal.
Figure 5-94
Figure 5-94
24. Install the main bearing cap with the 14 bolts
(12 pointed head) (Figure 5-95). See steps 13
to 18 starting at Cylinder Block Assembly on
page 5-63. NOTICE: NEVER turn the
crankshaft.
Tightening torque:
• First tightening: 1050 kgf·cm, 102.90 N·m
(78.9 lb-ft).
• Second tightening: Turn by 90°
Figure 5-95
Figure 5-95
25. Remove the 14 bolts and main bearing caps.
26. Measure the plastigage at the widest point
(Figure 5-96).
(a) Standard clearance: 0.036 to 0.054 mm
(0.001 to 0.002 in.)
(b) Maximum clearance: 0.10 mm (0.004 in.)
If the measured oil clearance exceeds the
specified maximum, replace the bearing and
grind or replace the crankshaft as necessary.
Figure 5-96
Figure 5-96
0004
8
75
(1)
0004
8
76
0004
8
77
0004
8
7
8
