General Guidelines; Remove And Install Cylinder Head Cover - Yanmar BY Series Service Manual

Cylinder Head
12/05

General Guidelines

NOTICE: Mark all valve train components so they
can be installed back in their original locations.
Note: Record all measurements taken during
disassembly and inspection.
Remove and Install Cylinder Head
Cover
Cylinder Head Cover Components
Figure 5-3
(3)
(2)
(4)
(1)
Figure 5-3
1 – Cylinder Head Cover
2 – Rubber Gasket
3 – Oil Fill Cap
4 – Seal
5 – Crankcase Ventilation Diaphragm Housing
6 – Seal
7 – Double-Ended Bolt
8 – Bolt
9 – Profile Gasket
BY Service Manual
(5)
(6)
(7)
(8)
(9)
0003705
© 2009 Yanmar Marine International
NOTICE: When working on the oil, coolant or fuel
systems you must protect the alternator from
contamination. Cover alternator with suitable
materials.
Removal
1. Disconnect negative (-) battery cable.
2. Remove upper engine cover.
3. Remove intake manifold. See Intake Manifold
on page 5-66. Plug all intake ports to prevent
contamination.
4. Clean the cylinder head cover and the
surrounding area.
5. Disconnect high-pressure fuel lines
(Figure 5-4, (1)) and remove fuel injectors
(Figure 5-4, (2)). See Remove Fuel Injector on
page 6-11.
Figure 5-4
( 4 )
( 5 )
Figure 5-4
6. Disconnect breather hose (Figure 5-4, (3))
from breather.
7. Remove oil fill cap (Figure 5-4, (4)) and lift
rubber gasket (Figure 5-4, (5)) to access cover
bolt located under the rubber gasket.
8. Remove the cylinder head cover bolts in
sequence, working from the outer bolts toward
the center.
9. Remove cylinder head cover.
ENGINE
( 2 )
( 1 )
( 3 )
0003677C
5-17