Valve Spring Squareness

WARNING: This page is about a different car, the 2007 Nissan Maxima. 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)

Fig 1: Measuring Clearance Between Top Of Valve Spring And Try Square

Courtesy of NISSAN MOTOR CO., U.S.A.