Valve Spring: Testing and Inspection

INSPECT VALVE SPRINGS





1. Using a steel square, measure the squareness of the valve spring.
Maximum deviation: 2.0 mm (0.079 inch)
If deviation is greater than the maximum, replace the valve spring.





2. Using vernier calipers, measure the free length of the valve spring.
Free length: 44.78 mm (1.7630 inch)
If the free length is not as specified, replace the valve spring.





3. Using a spring tester, measure the tension of the valve spring at the specified installed length.
Installed tension:
At 33.3 mm (1.311 inch): 186 - 206 N (41.9 - 46.3 lbs.)
If the installed tension is not as specified, replace the valve spring.