Westerbeke 8.0KW-60Hz Service Manual page 26

ENGINE-DISASSEMBLY, INSPECTION AND ASSEMBLY
CYLINDER HEAD BOLT INSTALLATION
1. Before re-using the cylinder head bolt, check that its
normal length does not exceed the specified limit. Replace
the bolt if this measurement exceeds the limit.
LIMIT: 103.2mm (4.066in)
2. Fit the washer as shown.
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3. Apply engine oil to the bolts thread and washer.
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4. Tighten the bolts in the seque!Jce shown until each is
torqued to
TORQUE TO 49Nm (36.1 fI-lb)
5.
Completely loosen the bolts.
6.
Retighten the bolts in the sequence shown until each is
torqued to
TORQUE TO 20Nm (14.7 fI-lb)
8 6 1 3 9
•
• •• •
10 4 2 5 7
• •
•
• •
7. Apply paint marks to the cylinder head bolt heads and
cylinder head as shown.
8. In accordance with the tightening sequence, tighten each
bolt by 90°.
9. Tighten each bolt by a further 90" and check that the paint
marks on the bolt head and cylinder head are aligned.
A
CAUTION:
If the bolts
are
tightened by an angle
of less than
911',
they may not hold the cylinder head
with SlIfficient strength.
If the bolts are tightened by an angle exceeding
911',
completely remove them and carry out the installation
procedure again.
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Rocker Cover
Install the rocker cover using a new gasket (slightly coat both
sides with
clean
oil). Gradually tighten the cover bolts to the
specified torque making certain the cover gasket is positioned
properly.
ROCKER COVER BOLT TORQUE
4 Nm (2.9 fI·lb)
COVER
GASKET
LIGHTLY OIL
Engines & Generators
19