Camshaft: Testing and Inspection
Inspection1. Measure the bend, and repair or replace if necessary.
Service limit: 0.025 mm (0.0098 inch)
2. Check the journal for damage and wear. Replace if faulty.
3. Measure the outer diameter of camshaft journal and inner diameter of cylinder head journal, and make sure the difference (oil clearance) between the two values. If the oil clearance exceeds standard value, replace the camshaft or cylinder head as necessary.
4. Check the cam face condition, and remove the minor faults by grinding with oil stone. Measure the cam height H. If it exceeds the limit, replace it.
Cam height H.
Cam base circle diameter A:
Intake: 34.00 mm (1.3386 inch)
Exhaust. 34.00 mm (1.3386 inch)
Difference between base circles of adjacent intake cams (low speed and high speed): 0.03 mm (0.001 inch) or less
5. Measure the thrust clearance of camshaft with setting the dial gauge at end of camshaft. If the thrust clearance exceeds the limit, replace the camshaft cap and cylinder head as a set. If necessary, replace the camshaft.
Standard. 0.030 - 0.090 mm (0.0012 - 0.0035 inch)
Limit: 0.10 mm (0. 0039 inch)