Removing The Cylinder Head; Checking The Cylinder Head - Yamaha Grizzly550 User Manual

EAS24130

REMOVING THE CYLINDER HEAD

1. Align:
• "I" mark "a" on the AC magneto rotor
(with the stationary pointer "b" on the AC
magneto cover)
M MMM M MMM M M MMM M M MMM M
a. Turn the crankshaft counterclockwise.
b. When the piston is at TDC on the compres-
sion stroke, align the "I" mark "c" on the cam-
shaft sprocket with the stationary pointer "d"
on the cylinder head.
d
c
L LLL L LLL L L LLL L L LLL L
2. Loosen:
• Camshaft sprocket bolts "1"
• Decompressor assembly bolts "2"
TIP
While holding the AC magneto rotor nut with a
wrench, loosen the camshaft sprocket bolts and
decompressor assembly bolts.
3. Loosen:
• Timing chain tensioner cap bolt
M MMM M M MMM M MMM
a
b
L LLL L L LLL L LLL
1
2
5-12
CYLINDER HEAD
4. Remove:
• Timing chain tensioner
(along with the gasket)
• Camshaft sprocket
• Timing chain
TIP
To prevent the timing chain from falling into the
crankcase, fasten it with a wire.
5. Remove:
• Cylinder head
TIP
• Loosen the bolts in the proper sequence as
shown.
• Loosen each bolt 1/2 of a turn at a time. After
all of the bolts are fully loosened, remove them.
2
7
1
5
EAS24160

CHECKING THE CYLINDER HEAD

1. Eliminate:
• Combustion chamber carbon deposits
(with a rounded scraper)
ECA28P1030
NOTICE
Do not use a sharp instrument; otherwise,
the following may be damaged or scratched:
• Spark plug bore threads
• Valve seats
2. Check:
• Cylinder head
Damage/scratches → Replace.
• Cylinder head water jacket
Mineral deposits/rust → Eliminate.
4
6
8
3
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