Subaru Impreza 2003, Service Manual

Page: 1054 / 3610

ME(H4DOTC)-80
MECHANICAL
CAMSHAFT
Tightening torque:
T1: 10 N·m (1.0 kgf-m, 7.2 ft-lb)
T2: 20 N·m (2.0 kgf-m, 14.5 ft-lb)
(5) Remove the bearing caps.
(6) Measure the widest point of 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 the cam face condition; remove the minor
faults by grinding with oil stone. Measure the cam
height H, replace if the limit has been exceeded.
Cam height: H
Standard:
• Except for STi model
Intake:
46.25 — 46.35 mm (1.821 — 1.825 in)
Exhaust:
46.15 — 46.25 mm (1.817 — 1.821 in)
• STi model
Intake:
45.25 — 45.35 mm (1.781 — 1.785 in)
Exhaust:
45.60 — 45.70 mm (1.795 — 1.799 in)
Limit:
• Except for STi model
Intake:
46.15 mm (1.817 in)
Exhaust:
46.05 mm (1.813 in)
• STi model
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)
6) Measure the thrust clearance of camshaft with
dial gauge. If the clearance exceeds the limit, re-
place the caps and cylinder head as a set. If neces-
sary, replace the camshaft.
Standard:
0.040 — 0.080 mm (0.0016 — 0.0031 in)
Limit:
0.1 mm (0.004 in)
ME-00371
(F) (D)
(C)
T1
T2
(A)
(E)
(B)
ME-00119
ME-00120
H
A
ME-00121