Valve Spring: Testing and Inspection

Squareness
1. Measure "S" dimension.
Out-of-square:
Outer
Less than 2.2 mm (0.087 in)
Inner
Less than 1.9 mm (0.075 in)

2. If it exceeds the limit, replace spring.





Pressure
Check valve spring pressure
Pressure: N (kg, lb) at height mm (in)
Standard
Outer
523.7 (53.4,117.7) at 30.0 (1.181)
Inner
255.0 (26.0, 57.3) at 25.0 (0.984)
Limit
Outer
More than 462.9 (47.2,104.1) at 30.0 (1.181)
Inner
More than 225.6 (23.0, 50.7) at 25.0 (0.984)

If it exceeds the limit, replace spring.