Servicing; Cylinder Head And Valves - wsm V3307-DI-T-E2B Workshop Manual

V3307-DI-T-E2B, WSM

[3] SERVICING

(1) Cylinder Head and Valves

Top Clearance
1. Remove the cylinder head (remove the cylinder head gasket
completely).
2. Bring the piston to its top dead center, fasten fuse wires (Dia. :
1.5 mm (0.059 in.), long : 5.0 to 7.0 mm (0.20 to 0.28 in.)) (1) to
3 to 4 spots on the piston top with grease so as to avoid the intake
and exhaust valves and the combustion chamber ports.
3. Bring the piston to its middle position, install the cylinder head,
and tighten the cylinder head screws to specification. (Head
gasket must be changed to new one).
4. Turn the crank shaft until the piston exceeds its top dead center.
5. Remove the cylinder head, and measure squeezed fuse wires (1)
for thickness.
6. If the measurement is not within the specified value, check the oil
clearance of the crankpin journal and the piston pin.
Top clearance Factory spec.
Cylinder head mounting
Tightening torque
screw
(1) Fuse Wire
Cylinder Head Surface Flatness
1. Clean the cylinder head surface.
2. Place a straightedge on the cylinder head's four sides A, B, C
and D and two diagonal E and F as shown in the figure.
Measure the clearance with a feeler gauge.
3. If the measurement exceeds the allowable limit, correct it with a
surface grinder.
IMPORTANT
• Be sure to check the valve recessing after correcting.
Cylinder head surface
Allowable limit
flatness
S-59
ENGINE
0.60 to 0.80 mm
0.024 to 0.031 in.
187 to 196 N·m
19.0 to 20.0 kgf·m
138 to 144 lbf·ft
W1049122
0.05 mm
0.002 in.
W1061323
KiSC issued 01, 2009 A