Subaru Impreza 2004 - Manual (Page 5)

ME(H4DOTC)-4
MECHANICAL
General Description
Piston ring
Piston ring gap
Top ring
STD 0.20 — 0.25 mm (0.0079 — 0.0098 in)
Limit 1.0 mm (0.039 in)
Second
ring STD 0.40 — 0.50 mm (0.016 — 0.020 in)
Limit 1.0 mm (0.039 in)
Oil ring
STD 0.20 — 0.50 mm (0.0079 — 0.020 in)
Limit 1.5 mm (0.059 in)
Clearance between piston
ring and piston ring
groove Top ring
STD 0.04 — 0.08 mm (0.0016 — 0.0031 in)
Limit 0.15 mm (0.0059 in)
Second
ring STD 0.030 — 0.070 mm (0.0012 — 0.0028 in)
Limit 0.15 mm (0.0059 in)
Connecting
rod
Bend or twist per 100 mm (3.94 in) in
length
Limit 0.10 mm (0.0039 in)
Side clearance
STD 0.070 — 0.330 mm (0.0028 — 0.0130 in)
Limit 0.4 mm (0.016 in)
Connecting
rod bearing
Oil clearance
STD 0.020 — 0.046 mm (0.0008 — 0.0018 in)
Limit 0.05 mm (0.0020 in)
Thickness at center portion
STD 1.486 — 1.498 mm (0.0585 — 0.0590 in)
0.03 mm
(0.0012
in) US
1.504 — 1.512 mm (0.0592 — 0.0595 in)
0.05 mm
(0.0020
in) US
1.514 — 1.522 mm (0.0596 — 0.0599 in)
0.25 mm
(0.0098
in) US
1.614 — 1.622 mm (0.0635 — 0.0639 in)
Connecting
rod bushing Clearance between piston pin and
bushing STD 0 — 0.022 mm (0 — 0.0009 in)
Limit 0.030 mm (0.0012 in)