Valve Spring: Testing and Inspection

VALVE SPRING INSPECTION





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





2. Using vernier calipers, measure the free length of the valve spring.
Free length: 43.94 - 45.06 mm (1.7299 - 1.7740 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: 214 - 238 N (48.1 - 53.4 lbs.) at 36.5 mm (1.437 inch)
If the installed tension is not as specified, replace the valve spring.