Installing The Cylinder Head - Yamaha Grizzly550 User Manual

EAS24230

INSTALLING THE CYLINDER HEAD

1. Install:
• Cylinder head gasket
• Dowel pins
2. Install:
• Cylinder head
• Cylinder head bolts
Cylinder head bolt "1"
35 Nm (3.5 m·kg, 25 ft·lb)
Cylinder head bolt "2"
35 Nm (3.5 m·kg, 25 ft·lb)
Cylinder head bolt "3"
38 Nm (3.8 m·kg, 27 ft·lb)
Cylinder head bolt "4"
10 Nm (1.0 m·kg, 7.2 ft·lb)
Cylinder head bolts "1"
Length: 135 mm (5.31 in)
Cylinder head bolts "2"
Length: 145 mm (5.71 in)
TIP
• Lubricate the cylinder head bolt "1" and "2"
threads and mating surface with molybdenum
disulfide grease.
• Lubricate the cylinder head bolts "3" threads
and mating surface with engine oil.
• Tighten the cylinder head bolts in the proper
tightening sequence as shown and torque
them in two stages.
4
2
7
2
8
4
4
3
3. Install:
• Decompressor assembly
• Camshaft sprocket
(onto the camshaft)
M MMM M MMM M M MMM M M MMM M
a. Install the decompressor assembly onto the
camshaft, and then finger tighten the decom-
pressor assembly bolts "1".
b. Turn the crankshaft counterclockwise.
c. Align the "I" mark "a" on the AC magneto rotor
with the stationary pointer "b" on the AC mag-
neto cover.
New
3
5
3
1
1
6
M MMM M M MMM M MMM
d. Align the "I" mark "c" on the camshaft sprock-
et with the stationary pointer "d" on the cylin-
der head.
e. Install the timing chain "2" onto the camshaft
sprocket "3", and then install the camshaft
sprocket onto the camshaft, and then finger
tighten the camshaft sprocket bolts "4".
d
c
2
4
TIP
When installing the camshaft sprocket, be sure
to keep the timing chain as tight as possible on
the exhaust side.
ECA28P1031
NOTICE
Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
f. Remove the wire from the timing chain.
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4. Install:
• Timing chain tensioner
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a. Remove the timing chain tensioner cap bolt
"1", copper washer "2" and spring "3".
b. Release the timing chain tensioner one-way
cam "4" and push the timing chain tensioner
rod "5" all the way into the timing chain ten-
sioner housing.
c. Install the timing chain tensioner and gasket
"6" onto the cylinder.
Timing chain tensioner bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
5-14
CYLINDER HEAD
a
b
4
3
1
L LLL L L LLL L L LLL L LLL
M MMM M M MMM M M MMM M MMM
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