1. Measure the valve head margin thickness of each valve. Replace the valve if necessary.
Minimum margin thickness
2. Measure the length of each valve. Replace the valve if necessary.
Standard length
3. Measure the stem diameter of each valve in X and Y directions at the three points (A, B, and C) shown. Replace the valve if necessary.
Standard diameter
4. Measure the inner diameter of each valve guide in X and Y directions at the three points (A, B, and C) shown. Replace the valve guide if necessary.
Standard inner diameter
5. Measure the protrusion height (dimension A) of each valve guide without lower valve spring seat. Replace the valve guide if necessary.
Standard height