Installing The Intake Manifold; Installing The Marine Gear; Installing The Push Rod And Rocker Arm Shaft Assembly; Installing The Rocker Arm Cover - Yanmar 6LY3 series Service Manual

ENGINE

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
(1)
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.
Rocker Arm Shaft Support Bolt Torque (M8)
26 ± 3 N·m
(2.6 ± 0.3 kgf·m)
(19.1 ± 2.2 lb-ft)
5-66
(2)
(3)
(4)
0005810
© 2007 Yanmar Marine International
Assembling the Engine and Components
6. Measure valve clearances and ensure they fall
within the following specifications.
Figure 5-109
20 12
26 18 10
1 2
(1)
24 16 8
22 14
Figure 5-109
1 – Flywheel End
2 – Coolant Pump End
3 – Operating Side
Standard Valve Clearance
Intake Valve
Exhaust Valve
NOTICE: Be sure the opening and closing angles
for both intake and exhaust valves are checked
when timing gear is disassembled.
Intake Valve Open
Intake Valve Closed
Exhaust Valve Open
Exhaust Valve Closed

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.
6LY3 Service Manual
3 5 13 21
1 7 15 23
3 4 5 6
(2)
2 9 17 25
6 4 11 19
(3)
0005615
0.15-0.25 mm
(0.005-0.009 in.)
0.45-0.55 mm
(0.017-0.021 in.)
before TDC 26° ± 5°
after BDC 56° ± 5°
before BDC 67° ± 5°
after TDC 29° ± 5°