Kubota GR1600EU Workshop Manual page 97

GR1600EU, WSM
Top Clearance
1. Remove the cylinder head. (Do not try to remove the cylinder
head gasket.)
2. Move the piston up, and stick a strip of plastigauge (1) [5.0 to
7.0 mm long (0.20 to 0.27 in. long)] on the piston head at three
positions with grease so as to avoid the intake and exhaust
valves and the combustion chamber ports.
3. Lower the piston, and install the cylinder head and tighten the
cylinder head screws to the specified torque.
4. Turn the flywheel until the piston exceeds its top dead center.
5. Remove the cylinder head, and measure the squeezed
plastigauges (2).
6. If the measurement is not within the factory specifications,
check the oil clearance between the crankpin and crankpin
bearing and between the piston pin and small end bushing.
NOTE
• After checking the top clearance, be sure to assemble the
cylinder head with a new cylinder head gasket.
Top clearance Factory specification
Tightening torque Cylinder head screw
(1) Plastigauge
(2) Squeezed Plastigauge
1-S11
ENGINE
0.50 to 0.70 mm
0.020 to 0.027 in.
38 to 42 N·m
3.8 to 4.3 kgf·m
28 to 31 lbf·ft
(3) Scale
9Y1210595ENS0091US0
KiSC issued 11, 2013 A