Measure the length of the valve spring. If the measurement is less than the allowable limit, replace the spring [Figure 70-100-20].
Put the spring on a flat surface, place a square on the side of the spring [Figure 70-100-20].
Rotate the spring and measure the maximum tilt. If the measurement exceeds the allowable limit, replace the spring.
Place the spring on a tester and compress to specified length [Figure 70-100-21].
