FixVault

Valve Spring

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
VALVE SPRING SPECIFICATION

Free height mm (in) 46.52 (1.8315)
Pressure N (kg, lb) at height mm (in) Standard 166 - 188 (16.9 - 19.2, 37.3 - 42.3) at 37.0 (1.457)
Limit 373 - 421 (38.0 - 42.9, 83.9 - 95.0) at 27.2 (1.071)
Out-of-square mm (in) Less than 2.0 (0.079)