Valve Spring Dimensions and Valve Spring Pressure Load

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.

Check the valve spring (with valve spring seat) pressure at specified spring height.
Standard: Refer to "CYLINDER HEAD ".

Fig 1: Checking Valve Spring Pressure Using Tool
Courtesy of NISSAN NORTH AMERICA, INC.
If the installation load or load with valve open is out of the standard.
- 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.