Valve Spring: Testing and Inspection

1. Check valve springs for damage, free length, and tension. Replace valve spring if it is not to the specifications presented below.


Free Length: 44.05 mm (1.7342 inch)
Squareness: 2.5° or 1.9 mm (0.075 inch)

Tension/Spring Height:
At 174.6 - 200.1 N (39.2 - 45.0 lbs.): 36.0 mm (1.417 inch)
At 405.0 - 458.0 N (91.1 - 103.0 lbs.): 28.2 mm (1.110 inch)


2. To measure the squareness of the valve spring, stand the spring on a surface plate and measure its deflection at the top using a try square.