Subaru Impreza 2004 Service Manual page 9

MECHANICAL
Surface warpage limit (mating with cylinder head)
Surface grinding limit
Cylinder bore
Taper
Cylinder
block
Out-of-roundness
Piston clearance
Enlarging (boring) limit
Piston Outer diameter
Standard clearance between piston
pin and hole in piston
Piston pin
Degree of fit
Piston ring gap
Piston ring
Clearance between piston
ring and piston ring
groove
Bend or twist per 100 mm (3.94 in) in
length
Connecting
rod
Side clearance
Oil clearance
Connecting
rod bearing
Thickness at center portion
Connecting Clearance between piston pin and
rod bushing bushing
General Description
A
STD
B
STD
Limit
STD
Limit
STD
Limit
A
STD
B
0.25 mm (0.0098 in)
OS
0.50 mm (0.0197 in)
OS
STD
Limit
STD
Top ring
Limit
STD
Second
ring
Limit
STD
Oil ring
Limit
STD
Top ring
Limit
STD
Second
ring
Limit
Limit
STD
Limit
STD
Limit
STD
0.03 mm
(0.0012
in) US
0.05 mm
(0.0020
in) US
0.25 mm
(0.0098
in) US
STD
Limit
ME(H4DOTC)-8
0.05 mm (0.0020 in)
0.1 mm (0.004 in)
92.005 — 92.015 mm (3.6222 — 3.6226 in)
91.995 — 92.005 mm (3.6218 — 3.6222 in)
0.015 mm (0.0006 in)
0.050 mm (0.0020 in)
0.010 mm (0.0004 in)
0.050 mm (0.0020 in)
0.010 — 0.030 mm (0.0004 — 0.0012 in)
0.050 mm (0.0020 in)
0.5 mm (0.020 in)
91.985 — 91.995 mm (3.6214 — 3.6218 in)
91.975 — 91.985 mm (3.6211 — 3.6214 in)
92.225 — 92.235 mm (3.6309 — 3.6313 in)
92.475 — 92.485 mm (3.6407 — 3.6411 in)
0.004 — 0.008 mm (0.0002 — 0.0003 in)
0.020 mm (0.0008 in)
Piston pin must be fitted into position with thumb at 20 C
(68 F).
0.20 — 0.25 mm (0.0079 — 0.0098 in)
1.0 mm (0.039 in)
0.40 — 0.50 mm (0.016 — 0.020 in)
1.0 mm (0.039 in)
0.20 — 0.50 mm (0.0079 — 0.020 in)
1.5 mm (0.059 in)
0.040 — 0.080 mm (0.0016 — 0.0031 in)
0.15 mm (0.0059 in)
0.030 — 0.070 mm (0.0012 — 0.0028 in)
0.15 mm (0.0059 in)
0.10 mm (0.0039 in)
0.070 — 0.330 mm (0.0028 — 0.0130 in)
0.4 mm (0.016 in)
0.020 — 0.046 mm (0.0008 — 0.0018 in)
0.05 mm (0.0020 in)
1.486 — 1.498 mm (0.0585 — 0.0590 in)
1.504 — 1.512 mm (0.0592 — 0.0595 in)
1.514 — 1.522 mm (0.0596 — 0.0599 in)
1.614 — 1.622 mm (0.0635 — 0.0639 in)
0 — 0.022 mm (0 — 0.0009 in)
0.030 mm (0.0012 in)