Impreza L Sedan F4-2.2L SOHC (1997)
Camshaft: Testing and Inspection
CAMSHAFT
1. Measure the bend, and repair or replace if necessary.
Limit: 0.025 mm (0.0010 inch).
2. Check journal for damage and wear. Replace if faulty.
3. Measure outside diameter of camshaft journal and inside diameter of cylinder head journal, and determine the difference between the two (= oil
clearance). If oil clearance exceeds specifications, replace camshaft or cylinder head as necessary.
4. Check cam face condition; remove minor faults by grinding with oil stone. Measure the cam height H; replace if the limit has been exceeded.
Standard
IN: 32.244 - 32.344 mm (1.2694 - 1.2734 inch).
EX: 31.964 - 32.064 mm (1.2584 - 1.2624 inch).
Limit
IN: 32.094 mm (1.2635 inch).
EX: 31.814 mm (1.2525 inch).
Cam base circle diameter A:
IN: 27.5 mm (1.083 inch).
EX: 27.0 mm (1.063 inch).
CAMSHAFT SUPPORT
Measure the thrust clearance of camshaft with dial gauge. If the clearance exceeds the limit, replace camshaft support.
Standard: 0.030 - 0.260 mm (0.0012 - 0.0102 inch)
Limit: 0.35 mm (0.0138 inch).