Subaru Impreza 2004 Service Manual page 4

Refacing angle
Valve seat
Contacting width
Inner diameter
Valve guide
Protrusion above head
Head edge thickness
Stem diameter
Valve
Stem oil clearance
Overall length
Free length
Squareness
Valve
spring
Tension/spring height
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
General Description
STD
Intake
Limit
STD
Exhaust
Limit
STD
Intake
Limit
STD
Exhaust
Limit
Intake
Exhaust
Intake
STD
Exhaust
Limit —
Intake
Exhaust
Set
Lift
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
ME(H4DOTC)-3
90
1.0 mm (0.039 in)
1.7 mm (0.067 in)
1.5 mm (0.059 in)
2.2 mm (0.087 in)
6.000 — 6.012 mm (0.2362 — 0.2367 in)
15.8 — 16.2 mm (0.622 — 0.638 in)
1.2 mm (0.047 in)
0.8 mm (0.031 in)
1.5 mm (0.059 in)
0.8 mm (0.031 in)
5.955 — 5.970 mm (0.2344 — 0.2350 in)
5.945 — 5.960 mm (0.2341 — 0.2346 in)
0.030 — 0.057 mm (0.0012 — 0.0022 in)
0.040 — 0.067 mm (0.0016 — 0.0026 in)
0.15 mm (0.0059 in)
104.4 mm (4.110 in)
104.7 mm (4.122 in)
47.32 mm (1.8630 in)
2.5 , 2.1 mm (0.083 in)
205 — 235 N (20.9 — 24.0 kgf, 46.1 — 52.8 lb)/
36.0 mm (1.417 in)
426 — 490 N (43.4 — 50.0 kgf, 95.8 — 110 lb)/
26.5 mm (1.043 in)
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).
MECHANICAL