Piston Ring Installation - Westerbeke 9.0 BCG Technical Manual

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Piston Ring Installation
1. When installing the piston rings, make sure that
the marks stamped on the rings by the manufac-
turer face upward towards the piston crown.
2. Make sure that the ring openings do not align
when they are on the piston. Position the ring
gaps in the direction shown in the figure.
3. Apply engine oil to the external circumference of
piston pin.
4. Insert the connecting rod and piston assembly
into the cylinder block with a piston ring com-
pressor attached.
5. Install the cap on the connecting rod, making
sure that the front mark (projected) on the bear-
ing caps are aligned with the mark provided on
the connecting rod.
Westerbeke Generators 138
Compression
ring No.2
Thrust side
..
Compression
ring No.1