Subaru Robin EX13 - Manual (Page 33)

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(3) PISTON AND PISTON RINGS
Install each piston ring in the correct groove of
the piston by widening it enough to slide it over
the piston.
NOTE: Be careful not to twist the rings too much,
as they may be damaged. Install the oil
ring first, followed by the second ring and
then the top ring.
When installing the second ring, make
sure that the ‘N’ mark is face up.
(See Fig. 5-33)
Fig.5-31
OPEN ENDS OF PISTON RING
Fig.5-33
Fig.5-32
TOP
RING
SECOND
RING
OIL
RING
1
2
3
BARREL
(EX13/27)
TAPER
TAPER
(EX17/21)
1
2
3
CUTTER RING
WITH COIL
EXPANDER
THREE-PIECE
CONSTRUCTION
MARK "N"
EX17, EX21, EX27
MARK "R"
EX13