Valve Spring Squareness
WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Set try square along the side of valve spring and rotate the spring. Measure the maximum clearance between the top face of spring and try square.
- Out-of-square limit : Less than 2.0 mm (0.079 in)
Courtesy of NISSAN MOTOR CO., U.S.A.