Valve Spring

Valve Spring
Free height 51.28 - 51.48 mm (2.0189 - 2.0268 inch)
Pressure at height
Installation 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lbs.) at 33.8 mm (1.331 inch)
Valve open 291 - 372 N (29.7 - 37.9 kg, 65 - 84 lbs.) at 24.4 mm (0.961 inch)
Out-of-square Less than 2.2 mm (0.087 inch)