Subaru Impreza 2002 Service Manual page 202

C: INSPECTION
1) Measure the bend, and repair or replace if nec-
essary.
Limit:
0.020 mm (0.0008 in)
2) Check the journal for damage and wear. Re-
place if faulty.
3) Measure the outside diameter of camshaft jour-
nal. If the jounal diameter is not as specified, check
the oil clearance.
Front
37.946 — 37.9635 mm
Standard
(1.4939 — 1.4946 in)
4) Measurement of the camshaft journal oil clear-
ance:
(1) Clean the bearing caps and camshaft jour-
nals.
(2) Place the camshafts on the cylinder head.
(Without installing valve rocker.)
(3) Place a plastigauge across each of the cam-
shaft jounals.
(4) Gradually tighten the cap in at least two
stages in alphabetical sequence shown in the
figure, and then tighten to specified torque.
Tightening torque:
T1: 10 N·m (1.0 kgf-m, 7 ft-lb)
T2: 20 N·m (2.0 kgf-m, 14.5 ft-lb)
(A)
(E)
T1
(F)
(B)
CAUTION:
Do not turn the camshaft.
CAMSHAFT
G2M0746
Camshaft journal
Center, rear
29.946 — 29.963 mm
(1.1790 — 1.1796 in)
T2
(C)
(D)
EN1211
(5) Remove the bearing caps.
(6) Measure the widest point of the plastigauge
on each journal.
If the oil clearance exceeds the limit, replace the
camshaft. If necessary, replace the camshaft
caps and cylinder head as a set.
Standard:
0.037 — 0.072 mm (0.0015 — 0.0028 in)
Limit:
0.10 mm (0.0039 in)
(7) Completely remove the plastigauge.
5) Check cam face condition; remove minor faults
by grinding with oil stone. Measure the cam height
H; replace if the limit has been exceeded.
Cam height: H
Standard:
Intake:
45.25 — 45.35 mm (1.781 — 1.785 in)
Exhaust:
45.60 — 45.70 mm (1.795 — 1.799 in)
Limit:
Intake:
45.15 mm (1.778 in)
Exhaust:
45.50 mm (1.791 in)
Cam base circle diameter A:
37.0 mm (1.457 in)
ME(STi)-63
MECHANICAL
B2M1216
B2M1209A