Camshaft: Testing and Inspection

INSPECTION





1. Check the camshaft for bend, and repair or replace if necessary.
2. Check the journal for damage and wear. Replace if faulty.





3. Measure the outside diameter of camshaft journal. If the journal diameter is not within specifications, check the oil clearance.
4. Measurement of the camshaft journal oil clearance:
1 Clean the bearing caps and camshaft journals.
2 Place the camshafts on the cylinder head. (Without installing the valve rocker.)
3 Place a plastigauge across each of the camshaft journals.
4 Install the bearing cap.

NOTE: Do not turn the camshaft.

5 Remove the bearing caps.





6 Measure the widest point of the plastigauge on each journal. If oil clearance exceeds the limit, replace the camshaft. If necessary, replace the camshaft caps and cylinder head as a set.
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. If it exceeds the limit, replace it.
6. Measure the side clearance of camshaft with dial gauge. If the side clearance exceeds the limit or offset wearing is emitted, replace the caps and cylinder head as a set. If necessary, replace the camshaft.
Standard:
Intake 0.075 - 0.135 mm (0.0030 - 0.0053 inch)
Exhaust 0.030 - 0.090 mm (0.0012 - 0.0035 inch)