Subaru Legacy 2002 Service Manual page 379

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3) Make sure that 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:

0.004 — 0.008 mm (0.0002 — 0.0003 in)

0.020 mm (0.0008 in)

4) Check circlip installation groove on the piston

for burr (A). If necessary, remove burr from the

groove so that piston pin can lightly move.

5) Check piston pin circlip for distortion, cracks

CYLINDER BLOCK

4. PISTON RING

1) If piston ring is broken, damaged, or worn, or if

its tension is insufficient, or when the piston is

replaced, replace piston ring with a new one of the

same size as the piston.

¼ Marks are shown on the end of the top and

second rings. When installing the rings to the

piston, face these marks upward.

¼ Oil ring is composed of upper rail, expander

and lower rail. Be careful of the rail direction

when installing oil ring to the piston.

2) Squarely place piston ring and oil ring in

cylinder, and measure the piston ring gap with a

thickness gauge.

S173090A1004

(0.0079 — 0.0138)

(0.0138 — 0.0197)

(0.0079 — 0.0197)

Unit: mm (in)

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