Subaru 2009 IMPREZA Service Manual page 281

(3) Connect the PCV hose.
14) Install the high tension cord.
15) Install the timing
ME(H4SO)-48, INSTALLATION, Timing Belt Cov-
er.>
16) Install the crank pulley. <Ref. to ME(H4SO)-46,
INSTALLATION, Crank Pulley.>
17) Install the V-belts. <Ref. to ME(H4SO)-39, IN-
STALLATION, V-belt.>
C: INSPECTION
1) Measure the bend, and repair or replace if nec-
essary.
Camshaft bend limit:
0.025 mm (0.00098 in)
2) Check the journal for damage and wear. Re-
place if faulty.
3) Check the cam face condition, and remove the
minor faults by grinding with oil stone. If offset wear
occurs, replace it.
4) Measure the cam lobe height H, cam base circle
diameter A and base circle step of adjacent intake
cams (low speed and high speed). If it exceeds the
standard or offset wear occurs, replace it.
Cam lobe height H:
Constant
Intake Low speed
High speed Standard
Exhaust
Camshaft
belt cover. <Ref.
ME-00275
Unit: mm (in)
40.075 — 40.175
Standard
(1.5778 — 1.5817)
35.496 — 35.596
Standard
(1.3975 — 1.4014)
40.315 — 40.415
(1.5872 — 1.5911)
39.289 — 39.389
Standard
(1.5468 — 1.5507)
ME(H4SO)-63
Cam base circle diameter A:
Standard
to 34.00 mm (1.3386 in)
Base circle step of adjacent intake cams (low
speed and high speed):
Standard
0.03 mm (0.001 in) or less
H
5) Measure the outer diameter of camshaft journal
and inner diameter of cylinder head journal, and
check the difference (oil clearance) between the
two values. If the oil clearance is not within the
standard, replace the camshaft or cylinder head as
necessary.
Oil clearance Standard
Camshaft journal O.D.
Journal hole I.D.
6) Measure the thrust clearance with setting the
dial gauge at end surface of camshaft. If the thrust
clearance is not within the standard or there is off-
set wear, replace the camshaft caps and cylinder
head as a set. If necessary, replace the camshaft.
Camshaft thrust clearance:
Standard
0.030 — 0.090 mm (0.0012 — 0.0035 in)
MECHANICAL
A
ME-00276
Unit: mm (in)
0.055 — 0.090
(0.0022 — 0.0035)
31.928 — 31.945
(1.2570 — 1.2577)
32.000 — 32.018
(1.2598 — 1.2605)