Subaru 2009 IMPREZA Service Manual page 221

NOTE:
US: Undersize OS: Oversize
Belt tension
Protrusion of adjuster rod
adjuster
Valve rocker
Clearance between shaft and arm
arm
Bending limit
Cam lobe height
Cam base circle diameter
Camshaft
Base circle step of adjacent intake cams
(low speed and high speed)
Journal O.D.
Cylinder head journal I.D.
Thrust clearance
Oil clearance
Warping limit
(Mating surface with cylinder block)
Cylinder
head Grinding limit
Standard height
Seating angle between valve and valve seat
Valve seat
Contacting width between
valve and valve seat
Clearance between the valve
guide and valve stem
Inside diameter
Valve guide
Valve stem outer diameters
Valve guide protrusion
Head edge thickness
Valve
Overall length
Free length
Valve spring Tension/spring height
Squareness
Warping limit
(Mating surface with cylinder head)
Grinding limit
Standard height
Cylinder
block Taper
Out-of-roundness
Cylinder to piston clearance at 20°C (68°F)
Cylinder inner diameter boring limit (diameter)
General Description
mm (in) Standard
Constant
Intake Low speed
mm (in)
High speed
Exhaust
mm (in) Standard
mm (in) Standard
mm (in) Standard
mm (in) Standard
mm (in) Standard
mm (in) Standard
mm (in)
mm (in)
mm (in) Standard
mm (in)
N (kgf, lb)/mm (in)
mm (in) Standard
mm (in) Standard
mm (in) Standard
ME(H4SO)-3
mm (in) 5.2 — 6.2 (0.205 — 0.244)
0.020 — 0.054 (0.0008 — 0.0021)
mm (in) 0.025 (0.00098)
Standard 40.075 — 40.175 (1.5778 — 1.5817)
Standard 35.496 — 35.596 (1.3975 — 1.4014)
Standard 40.315 — 40.415 (1.5872 — 1.5911)
Standard 39.289 — 39.389 (1.5468 — 1.5507)
34.00 (1.3386)
0.03 (0.001)
mm (in) 31.928 — 31.945 (1.2570 — 1.2577)
mm (in) 32.000 — 32.018 (1.2598 — 1.2605)
0.030 — 0.090 (0.0012 — 0.0035)
0.055 — 0.090 (0.0022 — 0.0035)
mm (in) 0.035 (0.0014)
mm (in)
mm (in)
Intake 0.8 — 1.4 (0.03 — 0.055)
Exhaust 1.2 — 1.8 (0.047 — 0.071)
Intake 0.035 — 0.062 (0.0014 — 0.0024)
Exhaust 0.040 — 0.067 (0.0016 — 0.0026)
mm (in) 6.000 — 6.012 (0.2362 — 0.2367)
Intake 5.950 — 5.965 (0.2343 — 0.2348)
Exhaust 5.945 — 5.960 (0.2341 — 0.2346)
Intake 20.0 — 21.0 (0.787 — 0.827)
Exhaust 16.5 — 17.5 (0.650 — 0.689)
Intake 0.8 — 1.2 (0.03 — 0.047)
Exhaust 1.0 — 1.4 (0.039 — 0.055)
Intake 120.6 (4.75)
Exhaust 121.7 (4.79)
mm (in) 55.2 (2.173)
235.3 — 270.7 (24 — 27.6, 52.9 — 60.8)
Set
/45.0 (1.772)
578.9 — 639.9 (59.1 — 65.3, 130.3 — 143.9)
Lift
/34.7 (1.366)
2.5°, 2.4 mm (0.094 in) or less
mm (in) 0.025 (0.00098)
mm (in)
mm (in) 201.0 (7.91)
0.015 (0.0006)
0.010 (0.0004)
–0.010 — 0.010 (–0.00039 — 0.00039)
mm (in) To 100.005 (3.9372)
MECHANICAL
0.1 (0.004)
97.5 (3.84)
90°
0.1 (0.004)