Valve Spring (with valve spring seat) Squareness

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

Set a try square (A) along the side of valve spring (with valve spring seat) and rotate spring. Measure the maximum clearance between the top of spring and try square.

Fig 1: Checking Valve Spring Squareness Using Try Square
Courtesy of NISSAN NORTH AMERICA, INC.

Limit: Refer to "CYLINDER HEAD ".
If it exceeds the limit.
- Replace valve spring (with valve spring seat) (EXH). Refer to "EXPLODED VIEW ". (Exhaust side)
- Replace VVEL ladder assembly & cylinder head assembly. Refer to "EXPLODED VIEW ". (Intake side)
  NOTE: Since the valve spring (with valve spring seat) (INT) cannot be replaced by the piece, VVEL ladder assembly & cylinder head assembly replacement are required.