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[AI Cylinder heed tightening steps
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(1)
~oo~oo ~oo
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0 0 0
0
13
0
5
0
4
0
12
9 1 8
121
o
Removing Push-rods
1) Remove the six push-rods.
(Note for reassembling)
• Before inserting the push rods into the tappets, check to
see if their ends are properly engaged with the grooves.
If
a push rod is roughly inserted, it may hit the shoulder of
the tappet and be damaged.
(1)
Push-rod
- -
- - - - -
-~-~.-
.---.~
o
Removing Cylinder Heads
1) Remove the twelve cylinder head set bolts and two nuts.
2)
Lift
up the cylinder head to detach.
(Note for reassembling)
• Tighten the bolts and nuts after applying sufficient oil.
• Tighten the bolts and nuts in diagonal sequence starting
from the center. Tighten them uniformly, or the head
may deform in the long run.
(Important)
• When overhauling the engine, replace the gasket with a
new one without confusing its front and back.
Retighten the cylinder head after running the engine for
30 minutes.
• Tighten the cylinder head bolts and nuts to:
0850·8, OH850·B. 0950·8
!
39.2
to
44.1
(
4.0
to
4.5
28.9
to
64.7
to
69.6
(
6.6
to
7.1
47.7
to
51
(11
Gear case side
(2)
Flywheel side
o
Removing Cylinder Head Gasket
1) Detach the cylinder head gasket, being careful not to
scratch it.
(Note for reassembling)
• Before installing the gasket, check to see there is no
foreign matter on the cylinder head and the cylinder.
(11
Cylinder head gasket
118
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