Shibaura ST330, Workshop Manual

Page: 63 / 250

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(21) Cylinder head ass’y
➀ Set the piston at the TDC and measure the injection
beyond the cylinder block with a depth gauge or dial
gauge.
NOTE:
1. Measure holding the piston lightly by hand.
2. Use the cylinder with the largest projection
distance among the 3 cylinders as the reference.
The variation of the projection should be within 0.1
mm.
➁ Select a head gasket according to the measured value.
171Y
Measured value (mm) Head gasket part code No. Thickness when tightened
More than 0.6 – under 0.7 111147490 t = 1.3
More than 0.7 – less than 0.8 111147500 t = 1.4
NOTE: Four smallest digits of the part code No. are stamped on the top surface of the head gasket.
➂
Tighten the cylinder head in several steps in the
order as shown in the right figure and tighten with
the specified torque finally.
Cylinder head tightening torque
98 – 103 N·m {10 – 10.5 kgf·m}
NOTE:
1. Take care to the spring pin, which positions the
cylinder head ass’y.
2. Coat the thread with grease containing disulfide
molybdenum.
(22) Cap · Pushrod · Rocker arm ass’y
➀ Install the cap to the valve steam end.
➁
Install the push rod and rocker arm ass’y.
Rocker arm ass’y tightening torque
N843
27 – 39 N·m {2.8 – 4.0 kgf·m}
172Y
173Y