Yamaha WaveRunner FZR-GX1800 Service Manual page 164

POWR
1
2
3
È
6
A
7
8
5
B
6
A
7
B 8
5
É
3
1
5
4
6
2
5
1
3
2 6
4
3
Camshaft
IN
1 9 4
0 3
2
9 2 3
0 1 4
EX
IN
7 9 A
8 0 B
7 9 A
8 0 B
EX
5. Measure:
• Camshaft-journal-to-camshaft-cap
clearance
Out of specification → Replace the cyl-
inder head assembly.
Camshaft-journal-to-camshaft-cap
clearance:
0.020–0.061 mm (0.0008–0.0024 in)
Measurement steps:
1. Remove the valve lifters 1 and valve pads
2.
TIP
Make a note of the position of each valve lifter
and valve pad so that they can be installed in
their original positions.
2. Place the camshafts on the cylinder head.
3. Put a piece of Plastigauge 3 on each
camshaft journal.
TIP
E
Do not put the Plastigauge over the oil hole in
the camshaft journal.
4. Install the camshaft caps.
5. Apply engine oil to the threads of the cam-
shaft cap bolts.
6. Tighten the camshaft cap bolts until the
camshaft caps contact the cylinder head.
TIP
• Gradually tighten the camshaft cap bolts in
the sequence shown È.
• Make sure to keep the camshafts level.
• Do not turn the camshafts when measuring
the camshaft-journal-to-camshaft-cap clear-
ance with the Plastigauge.
7. Tighten the camshaft cap bolts to the
specified torque in the sequence shown
É.
Camshaft cap bolt:
16 N·m (1.6 kgf·m, 11.8 ft·lb)
8. Remove the camshaft caps, and then
measure the width of the Plastigauge 3.
5-57
E
1
2
3
4
6
7
8
9