Cylinder Head; Removing The Cylinder Head; Checking The Cylinder Head; Removing The Exhaust Cover - Yamaha E60HWD Service Manual

Removing the cylinder head

1. Remove the spark plugs, thermostat
cover, thermostat and thermoswitch.
2. Remove the cylinder head bolts (nut) in
the sequence shown.
cC
Do not scratch or damage the mating sur-
faces of the cylinder head and cylinder
block.

Checking the cylinder head

1. Eliminate carbon deposits from the com-
bustion chambers and check for deterio-
ration or corrosion.
2. Check the cylinder head warpage using a
straightedge 1 and thickness gauge 2
in four directions as shown. Replace if
above specification.
1
69D5G11
69D50280
2
69D50290
Cylinder head warpage limit:
0.1 mm (0.0039 in)

Removing the exhaust cover

1. Remove the exhaust cover bolts in the
sequence shown.

Checking the exhaust cover

1. Check the exhaust cover for distortion or
corrosion. Replace if necessary.

Installing the stud bolt

1. Temporary tighten the stud bolt 1.
1

Cylinder head

1
2
69D50300
3
4
5
6
69D50310
7
8
9
69D50281
5-26