ENGINE
Assembling the Engine and Components
5-66
6LY3 Service Manual
© 2007 Yanmar Marine International
Installing the Intake Manifold
Fit the intake manifold assembly and secure it by
tightening the bolts.
Installing the Marine Gear
Install the marine gear to the flywheel housing.
Refer to the
Service Manual
for the marine gear
procedure.
Installing the Push Rod and Rocker
Arm Shaft Assembly
1. Check the condition of each push rod.
See
Inspecting the Push Rods on page 5-51
.
2. Install the push rods into each tappet.
3. Install the valve caps on top of each valve
system.
4. Position the rocker arm shaft assembly.
Figure 5-108
Figure 5-108
1 – Rocker Arm Shaft Assembly
2 – Exhaust Rocker Arm
3 – Rocker Arm Support
4 – Intake Rocker Arm
5. Torque M8 bolts to the following specified
values.
6. Measure valve clearances and ensure they fall
within the following specifications.
Figure 5-109
Figure 5-109
1 – Flywheel End
2 – Coolant Pump End
3 – Operating Side
NOTICE: Be sure the opening and closing angles
for both intake and exhaust valves are checked
when timing gear is disassembled.
Installing the Rocker Arm Cover
1. Coat all of the rocker arm cover bolts
(M8 x 25 mm) with a liberal amount of clean
engine oil.
2. Install the rocker arm cover.
3. Install the lifting eye bolts to the drive shaft
housing and to the flywheel ends of the rocker
arm cover.
Rocker Arm Shaft Support Bolt Torque (M8)
26 ± 3 N·m
(2.6 ± 0.3 kgf·m)
(19.1 ± 2.2 lb-ft)
(2)
(
3
)
(4)
(1)
0005
8
10
Standard Valve Clearance
Intake Valve
0.15-0.25 mm
(0.005-0.009 in.)
Exhaust Valve
0.45-0.55 mm
(0.017-0.021 in.)
Intake Valve Open
before TDC
26° ± 5°
Intake Valve Closed
after BDC
56° ± 5°
Exhaust Valve Open
before BDC
67° ± 5°
Exhaust Valve Closed
after TDC
29° ± 5°
0005615
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(2)
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