Subaru Robin EX35 - Manual (Page 32)

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(3) PISTON AND PISTON RINGS
(a) 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 top ring.
When installing the piston ring, make
sure that the "R" mark is face up.
(See Fig. 5-33)
Fig.5-31
OPEN ENDS OF PISTON RING
Fig.5-33
Fig.5-32
MARK "R"
TOP
RING
OIL
RING
1
2
TAPER
THREE-PIECE
CONSTRUCTION
1
2