Valve Spring

VALVE SPRING
Free height 50.47 mm (1.987 inch)
Valve closed (installation) height 40.0 mm (1 575 inch)
Valve open height 30.0 mm (1.181 inch)
Pressure at valve open height
Standard 770 - 837 N (78.5 - 85.4 kg, 173.1 - 188.2 lbs.) at 30.0 mm (1.181 inch)
Limit 733 N (74.8 kg, 164.8 lbs.) at 30.0 mm (1.181 inch)
Out-of-square 2.0 mm (0.079 inch)