Yanmar 6LPA-STP2 Service Manual page 116

ENGINE
13. Tighten the 26 cylinder head bolts in uniform
steps in the sequence shown in Figure 5-67.
Torque the bolts to 700 kgf·cm, 68.65 N·m
(50.6 lb-ft).
• Bolt length:
A. 121.5 mm (4.783 in.)
B. 133.5 mm (5.256 in.)
Figure 5-67
Figure 5-67
Note: If any one of the cylinder head bolts does
not satisfy the specified torque, replace
that bolt.
14. Mark the front side (Figure 5-68, (1)) of each
cylinder head bolt with paint (Figure 5-68, (2)).
15. Retighten the cylinder head bolts an additional
90° (Figure 5-68, (3)).
16. Retighten the cylinder head bolts again an
additional 90° (Figure 5-68, (4)).
5-36
Figure 5-68
(3)
(1)
17. After tightening, check that the painted marks
face 180° from the starting point.
Camshaft Installation
1. Install the thrust plate (Figure 5-69, (1)).
Figure 5-69
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2. Install the 7 lower camshaft bearings.
Note: There are two types of camshaft
© 2007 Yanmar Marine International
(4)
(4)
(3)
(2)
Figure 5-68
(1)
Figure 5-69
bearings, one having a 20 mm (0.787 in.)
(Figure 5-70, (2)) width and the other,
29 mm (0.142 in.) (Figure 5-70, (1)).
Install the 29 mm (0.142 in.) bearing
together with the camshaft bearing cap
at the position of cylinder head journal
No. 1.
Install the 20 mm (0.787 in.) bearing at
the other position.
6LPA Service Manual
Cylinder Head
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