Valve Spring

Compression Pressure (N [lbs..] @ Spec. Length) 800.6 N (180 Lbs.)
Valve open to maximum lift 29.5 mm (1.16 In.) 288.1 N (65 Lbs.)
Valve closed 40.1 mm (1.58 In.)
Free Length (Approximate) 46.7 mm (1.84 In.)
Installed Spring Height 44.17-41.98 mm (1.736-1.650 In.)
Service Limit 10% Force Loss @ Specified Height