Valve Spring: Specifications

Valve spring free length
INNER
Standard 36.08 mm (1.4204 inch)
Limit 35.00 mm (1.3780 inch)
OUTER
Standard 40.44 mm (1.5921 inch)
Limit 39.22 mm (1.544 inch)
Valve spring squareness limit 2.0 mm (0.079 inch)