Service manual

ENGINE TOP END 5-39
Cylinder and Piston
NOTE
○
The oil ring rails have no “top” or “bottom”.
•
Install the oil ring expander [A] in the bottom piston ring
groove so the ends [B] butt together.
•
Install the oil ring steel rails, one above the expander and
one below it.
○
Spread the rail with your thumbs, but only enough to fit
the rail over the piston.
○
Release the rail into the bottom piston ring groove.
•
Do not mix up the top ring and second ring.
•
Install the top ring [A] so that the “R”mark[B]facesup.
•
Install the second ring [C] so that the “RN”mark[D]faces
up.
•
The piston ring openings must be positioned as shown in
the figure. The openings of the oil ring steel rails do not
align.
Top Rin g [ A]
Second Ring [B]
Oil Ring Steel Rails [C]
Oil Ring Expander [D]
F mark [E] must be faced toward Front Side for front and
rear pistons
Opening Positions [F]
•
Fit a new piston pin snap ring into the side of the piston
so that the ring opening [A] does not coincide with the slit
[B] of the piston pin hole.
○
When installing the piston pin snap ring, compress it only
enough to install it and no more.
•
Apply engine oil to the cylinder bore and, piston skirt.
•
Install:
Dowel Pins [A]
New Cylinder Base Gasket [B]