Subaru 2002 IMPREZA Service Manual page 1128

MECHANICAL
3) Make sure that the piston pin can be inserted
into the piston pin hole with a thumb at 20°C (68°F).
Replace if defective.
Standard clearance between piston pin and
hole in piston:
Standard
0.004 — 0.008 mm (0.0002 — 0.0003 in)
Limit
0.020 mm (0.0008 in)
4) Check the circlip installation groove on piston for
burr (A). If necessary, remove the burr from groove
so that the piston pin can lightly move.
5) Check the piston pin circlip for distortion, cracks
and wear.
CYLINDER BLOCK
4. PISTON RING
1) If the piston ring is broken, damaged, or worn, or
if its tension is insufficient, or when the piston is re-
placed, replace the piston ring with a new one of
the same size as the piston.
CAUTION:
• Marks are shown on the end of top and sec-
ond rings. When installing the rings to piston,
face this mark upward.
• Oil ring consists of upper rail, expander and
lower rail. When installing on piston, be careful
of each rail's direction.
B2M1401
B2M0084A
B2M0420B
ME(TURBO)-86
(A) Upper rail
(B) Expander
(C) Lower rail
(A)
(B)
(C)
(A)
(B)
(C)
EN1514