Valve Spring Compression Pressure

Item	Specification
Intake and exhaust (installed)	52 lb (230 N)
Intake (valve open) 9.34 mm (0.3677 in) of lift	126 lb (560 N)
Exhaust (valve open) 9.34 mm (0.3677 in) of lift	126 lb (560 N)
Free length	1.8598 in (47.24 mm)
Assembled height	1.4921 in (37.9 mm)