Yanmar BY Series Service Manual page 80

ENGINE
Installation
1. Thoroughly clean all gasket residue from the
mating surfaces.
2. Apply a thin uniform bead of Three Bond
1207F (Yanmar part No. 977770-1207F)
approximately 2 mm (0.079 in.) high and 2 mm
(0.079 in.) wide at the transition to each end of
the half-moon section (Figure 5-5).
Figure 5-5
Figure 5-5
3. Install cylinder head cover gasket. Ensure
gasket is correctly seated on rear of cylinder
head.
Note: Double-ended bolts (Figure 5-6, (1)) are
used on the inner row only.
Figure 5-6
( 1 )
Figure 5-6
5-18
4. Install cylinder head cover. Tighten bolts in two
stages to 9.5 N·m (84 in.-lb). Tighten inner row
(Figure 5-6, (1)) working evenly from the center
towards each end. Tighten outer bolts evenly
®
and diagonally.
5. Install rubber gasket and oil filler cap.
6. Breather / blow-by spacer is a two-part
assembly, clean mating surfaces and seal the
parts together. Apply a bead of Loctite 5970
gasket sealant to the upper side of the blow-by
spacer as shown and assemble both halves.
Figure 5-7
7. Install assembled breather housing to cylinder
head and tighten bolts to the specified torque,
see Special Torque Chart on page 5-8.
8. Connect breather hose to vacuum chamber.
9. Install fuel injectors and connect high-pressure
fuel lines. See Install Fuel Injector on
page 6-13.
10. Install intake manifold. See Intake Manifold on
page 5-66.
11. Connect electrical connectors to the fuel
injectors, camshaft sensor, intake air pressure
sensor and intake air temperature sensor.
R11 0854 A
12. Install engine cover.
© 2009 Yanmar Marine International
Cylinder Head
Figure 5-7
BY Service Manual
IMG_0068