Westerbeke 20B TWO Tehnical Manual page 51

3. Set the piston ring gaps to the proper positions as
shown in the figure at right. Coat the rings and
cylinder wall with oil.
Ol' r i"if
Front
~
~
No.2 ring
gap~
Proper Arrangement of Ring Gaps
~
No.1 ring gap
~
,J!."
0' 0011
expander of oil
ring
4. Using a piston ring compressor to compress the rings into the grooves, push the piston and rod assembly
down into the cylinder. Be careful not to break the rings by excessively knocking the head of the piston.
Note that the front marks on the piston and connecting rod are toward the engine front.
5. Coat the bearing surface of the connecting rod caps
with engine oil. Fit each cap to the connecting rod
using match marks put before removal as a guide.
I
n the case of a new rod which does not have a mark,
position the notches (provided for preventing the
bearing from rotating) on the same side.
49
I
I
~ :
:
I I
I
~
I
I
I I
Connecting
Rod
~cap
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Westerbeke Engines