Kubota WSM 07-E3B Series - Cylinder Head and Valves; Servicing

S-82
07-E3B SERIES, WSM
ENGINE
[3] SERVICING
(1) Cylinder Head and Valves
Top Clearance
1. Remove the cylinder head.
2. With the piston at TDC, use grease to affix three or four
plastigauges of a diameter 1.5 mm (0.059 in.) x 5.0 to 7.0 mm
(0.20 to 0.27 in.) long to the crown of the piston; keep the gauges
away from the intake valve and combustion chamber fittings.
3. Take the piston to an intermediate position, install the cylinder
head and tighten the head bolts to the specified torque.
4. Turn the crankshaft so the piston goes through TDC.
5. Remove the cylinder head and compare the width of the crushed
plastigages with the scale.
6. If they are out of spec, check the oil clearance of the crank pin,
journals and piston pin.
NOTE
• Top clearance = Width of the crushed plastigauge.
• The polished cylinder head mounting screw with no marking
on the screw head has possibly used.
• In this case, tighten this screw to the same torque as the part
number 1J770-03450.
[V2607-DI-E3B, V2607-DI-T-E3]
[V3007-DI-T-E3B, V3307-DI-T-E3B]
W1049122
Top clearance Factory spec.
0.60 to 0.80 mm
0.024 to 0.031 in.
Tightening torque
Cylinder
head
mounting
screw
Head gasket
parts number:
1J700-03312,
1J700-03322,
1J700-03332
147 to 156 N·m
15.0 to 16.0 kgf·m
109 to 115 lbf·ft
Head gasket
parts number:
1J700-03313,
1J700-03323,
1J700-03333
155 to 165 N·m
15.8 to 16.8 kgf·m
114 to 121 lbf·ft
Tightening torque
Cylinder
head
mounting
screw
Part number:
1G772-03450
187 to 196 N·m
19.0 to 20.0 kgf·m
138 to 144 lbf·ft
Part number:
1J770-03450
165 to 175 N·m
16.9 to 17.8 kgf·m
122 to 129 lbf·ft
(1) Plastigauge (2) Scale
KiSC issued 06, 2020 A