1D-28 Engine Mechanical:
3) Draw out each piston pin (2) and remove the pistons
(3).
NOTE
Scribe the cylinder number on the piston
head.
Engine Top Side Assembly
B718H11406007
Assemble the engine top side in the reverse order of
disassembly. Pay attention to the following points:
Piston
• When installing the piston pins, apply molybdenum oil
solution onto each piston pin.
M/O: Molybdenum oil (MOLYBDENUM OIL
SOLUTION)
• Install the pistons and piston pins.
NOTE
• Be sure to install the pistons in the
cylinders from which they were removed in
disassembly, refer to the cylinder
numbers, #1 through #4, scribed on the
piston.
• When installing the pistons, the indent “A”
on the piston head must be faced to each
exhaust side.
• Place a clean rag over the cylinder base so as not to
drop the piston pin circlips (1) into the crankcase.
• Install the piston pin circlips (1).
CAUTION
!
Use new piston pin circlips (1) to prevent
circlip failure which will occur when it is bent.
NOTE
End gap of the circlip (1) should not be
aligned with the cutaway in the piston pin
bore.
CAUTION
!
When turning the crankshaft, pull the cam
chain upward, or the chain will be caught
between the crankcase and the cam drive
sprocket.
2
3
I718H1140047-02
“A”
I718H1140048-01
1
I718H1140049-02
I718H1140050-01
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