Subaru IMPREZA 2002 Service Manual page 101

GENERAL DESCRIPTION
MECHANICAL
Surface wamaae limit 0.05 mm (0.0020 in)
Surface grinding limit 0.1 mm (0.004 in)
Inner diameter
I
6.000 - 6.012 mm (0.2362
-
0.2367 in)
Standard height
98.3 mm (3.870 in)
Refacing angle
STD
Limit
STD
Limit
Intake
Exhaust
Contacting width
90"
1 .O mm (0.039 in)
1.7 mm (0.067 in)
1.4 mm (0.055 in)
2.1 mm (0.083 in)
Intake
Exhaust
Protrusion above head
20.0 - 20.5 mm (0.787 - 0.807 in)
16.5
-
17.0 mm (0.650
-
0.669 in)
I
Limit
I
-
I
0.1 5 mm (0.0059 in)
I
STD
Overall length
1 .O mm (0.039 in)
I
Intake
I
120.6 mm (4.75 in)
Intake
Exhaust
Limit
STD
Limit
Head edge thickness
I
Exhaust
I
121.7 mm (4.79 in)
0.6 mm (0.024 in)
1.2 mm (0.047 in)
0.6 mm (0.024 in)
Intake
Exhaust
Stem diameter
Tensionlspring height
5.950
-
5.965 mm (0.2343
-
0.2348 in)
5.945 - 5.960 "(0.2341
-
0.2346 in)
45.0 mm (1.772 in)
1
526.6
-
581.6 N (53.7
-
59.3 kgf, 118.4
-
130.8 Ib)/
Intake
Exhaust
STD
Stem oil clearance
0.035
-
0.062 mm (0.0014
-
0.0024 in)
0.040
-
0.067 mm (0.0016
-
0.0026 in)
~
Cylinder bore
Free length
Squareness
54.30 mm (2.1378 in)
2.5", 2.4 mm (0.094 in)
214.8-246.2N (21.9-25.1 kgf,48.3-55.3Ib)/
Surface warpage limit (mating with cylinder head)
Surface arindina limit
34.7 mm (1.366 in)
0.05 mm (0.0020 in)
0.1 mm (0.004 in)
A
99.505
-
99.515 mm (3.9175
-
3.9179 in)
Outer diameter
B
I
99.725 - 99.735 mm (3.9262 - 3.9266 in)
0.25 mm (0.0098 in)
os
99.495
-
99.505 mm (3.9171
-
3.9175 in)
I
99.975 - 99.985 mm (3.9360
-
3.9364 in)
0.50 mm (0.01 97 in)
I
os
STD
Limit
Taper
0.01 5 mm (0.0006 in)
0.050 mm (0.0020 in)
0.004 - 0.008 mm (0.0002
-
0.0003 in)
Standard clearance between piston pin and hole in pis-
ton
STD
Limit
Out-of-roundness
Piston pin must be fitted into position with thumb at
20°C (68°F).
Degree of fit
0.01 0 mm (0.0004 in)
0.050 mm (0.0020 in)
ME(S0HC)-3
STD
Limit
Piston clearance
0.01 0 - 0.030 mm (0.0004
-
0.0012 in)
0.050 mm (0.0020 in)
I
Enlarging (boring) limit
A
B
STD
0.5 mm (0.020 in)
99.485
-
99.495 mm (3.9167
-
3.91 71 in)
99.475 - 99.485 mm (3.9163 - 3.91 67 in)
-~
Standard inner diameter of piston pin hole
Outer diameter
23.000
-
23.006 mm (0.9055
-
0.9057 in)
22.994
-
23.000 mm (0.9053 - 0.9055 in)