ENGINE SYSTEMS
81
20) Cylinder head
➀ Position each of the pistons at top dead center and,
using a dial indicator, determine the distance each
piston projection above the face of the block.
NOTE: Measure each of the pistons while holding a
slight down pressure on the piston. Use the
dimension taken from the cylinder which
has the greatest projection and select a head
gasket as indicated in the following chart.
NOTE: The variation in the amount of protrusion
among all pistons must be within 0.1 mm.
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Models S753 and S773
Head gasket part code No.
Tightened
Thickness
S753 S773
111147640 111147570 t = 1.3
NOTE: Lowest for digits of code numbers are stamped on the head gasket. Install head gasket with code numbers at
top.
➁ 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
49 ~ 52 N·m (5.0 ~ 5.3 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.
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