Valve Spring Dimensions And Valve Spring Pressure Load

WARNING: This page is about a different car, the 2004 Nissan Murano and 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

Check valve spring pressure at specified spring height.
Standard:

Intake and exhaust

Free height

:47.07 mm (1.8531 in)

Installation height

:37.0 mm (1.457 in)

Installation load

: 166 - 188 N (16.9 - 19.2 kg, 37.3 - 42.3 lb)

Height during valve open

:27.2 mm (1.0709 in)

Load with valve open

: 373 - 421 N (38.0 - 42.9 kg, 83.9 - 94.6 lb)

Fig 1: Checking Valve Spring Dimensions And Valve Spring Pressure Load
Courtesy of NISSAN MOTOR CO., U.S.A.
If the installation load or load with valve open is out of the standard, replace valve spring.