Section04ENGINE
Subsection 08 (CYLINDER HEAD AND VALVES)
1
R1503motr98A
1. Cylinder head screws M6
– cylinder head screws M11 no. 17 retaining
cylinder head to engine block.
1
R1503motr99A
1. Cylinder head screws M11
Pull up cylinder head no. 18.
Remove gasket no. 19.
Cleaning
Remove carbon deposits from combustion cham-
ber, exhaust port and piston top.
Inspection
Check for cracks between valve seats, if so, re-
place cylinder head.
Check mating surface between cylinder and cylin-
der head for contamination. If so, clean both sur-
faces.
Installation
For installation, reverse the removal procedure.
Pay attention to the following details.
Ensure dowel pins are in place.
Install new cylinder head gasket.
CAUTION: Each installation of the cylinder
head requires a new cylinder head gasket. Us-
ing a gasket twice will cause engine damage,
even if the engine had not run.
Install cylinder screws M11 no. 17.Torque
screws as per following procedure.
CAUTION: This assembly uses stretch screws.
As the screws have been stretched from the
previous installation, it is very important to
measure each screw at assembly. If screw is
out of specification, replace by a new. Failure
to replace screws and to strictly follow the
torque procedure may cause screws to loosen
and lead to engine damage.
CYLINDER SCREW M11
SERVICE LIMIT
148.5 mm (5.846 in)
Torque screws according to following sequence.
First torque to 40 N•m(30lbf•ft).
Then tighten screws turning an additional 120° ro-
tation with a torque angle gauge and finish tight-
eningwitha90° rotation. Torque screws no. 16
to 10 N•m(88lbf•in).
1
R1503motr100A
2
1. Cylinder screws M11
2. Angle torque wrench
Remove crankshaft locking tool then install plug
with sealing ring.
Te m pla te 133
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