Valve Spring: Testing and Inspection

VALVE SPRING







Squareness
1. Measure "S" dimension. Out-of-square:

Outer: Less than 2.2 mm (0.087 inch)
Inner: Less than 1.9 mm (0.075 inch)

2. If it exceeds the limit, replace spring.






Pressure
Check valve spring pressure.

Standard pressure:
Outer: 523.7 N (53.4 kg, 117.7 lb.) at 30.0 mm (1.181 inch)
Inner: 255.0 N (26.0 kg, 57.3 lb.) at 25.0 mm (0.984 inch)

Limit pressure:
Outer: More than 228.5 N (23.3 kg, 51.4 lb.) at 25.0 mm (0.984 inch)
Inner: More than 225.6 N (23.0 kg, 50.7 lb.) at 25.0 mm (0.984 inch)

If not within specification, replace spring.