Valve Spring
Free Length (Approx.)Inner 48.59 mm (1.913 in.)
Outer 50.24 mm (1.978 in.)
Spring Tension (Valve Closed)
Inner 169 - 187 N @ 38.33 mm (38 - 42 lbs @ 1.509 in.)
Outer 271 - 289 N @ 43.41 mm (61 - 65 lbs @ 1.709 in.)
Spring Tension (Valve Open)
Inner 427 - 463 N @ 24.99 mm (96 - 104 lbs @ 0.984 in.)
Outer 854 - 925 N @ 30.07 mm (192 - 208 lbs @ 1.184 in.)
Valve Springs Number of Coils
Inner 6.9 Left Hand Twist
Outer 5.5 Right Hand Twist
Valve Springs Wire Diameter
Inner 3.35 mm (0.132 in.)
Outer 4.88 mm (0.192 in.)
Installed Height (Spring Seat to Bottom of Retainer)
Inner 37.77 mm (1.487 in.)
Outer 42.85 mm (1.687 in.)