Valve Spring: Testing and Inspection

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





2. Using a vernier caliper, measure the free length of the valve spring.
Free length: 45.0 mm (1.772 in.)
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: 164-189 N (36.8-42.5 lb) at 34.7 mm (1.336 in.)
If the installed tension is not as specified, replace the valve spring.