5-38 ENGINE TOP END
The piston ring openings must be positioned as shown in
the figure. The openings of the oil ring steel rails must be
about 30 ∼ 40° of angle from the opening of the top ring.
Top Ring [A]
Second Ring [B]
Upper Oil Ring Steel Rail [C]
Oil Ring Expander [D]
Lower Oil Ring Steel Rail [E]
30 ∼ 40° [G]
Position the crankshaft at #2, 3 piston TDC.
Prepare two auxiliary head bolts with their head cut.
Install the two cylinder head bolts [A] diagonally in the
Install the cylinder block [B].
First insert the #2, 3 pistons, and then rotate the crank-
shaft at 90° angle then insert the #1, 4 pistons.
Tighten the upper engine mounting bolts and engine
bracket bolts after cylinder head bolts tightend (see
Cylinder Head Installation).
Remove the cylinder (see Cylinder Removal).
Place a clean cloth under the pistons and remove the pis-
ton pin snap ring [A] from the outside of each piston.
Remove the piston pins.
If difficult to remove the piston pin, use the piston pin puller
assembly [A] to remove the piston pin.
Special Tool - Piston Pin Puller Assembly [A]: 57001-910
Remove the pistons.
Carefully spread the ring opening with your thumbs and
then push up on the opposite side of the ring [A] to remove
Remove the 3-piece oil ring with your thumbs in the same