Impreza WRX Wagon F4-2.0L DOHC Turbo (2002)
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:
Intake: 46.25 - 46.35 mm (1.821 - 1.825 inch)
Exhaust: 46.15 - 46.25 mm (1.817 - 1.821 inch)
Limit:
Intake: 46.15 mm (1.817 inch)
Exhaust: 46.05 mm (1.813 inch)
Cam base circle diameter A: 37.0 mm (1.457 inch)
6) Measure the thrust clearance of camshaft with dial gauge. If the clearance exceeds the limit, replace the caps and cylinder head as a set. If
necessary replace the camshaft.
Standard: 0.015 - 0.070 mm (0.0006 - 0.0028 inch)
Limit: 0.1 mm (0.004 inch)