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Valve Spring

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
VALVE SPRING SPECIFICATIONS

Free height mm (in) 47.07 (1.8531)
Pressure N (kg, lb) at height mm (in) Installation 166 - 188 (16.9 - 19.2, 37 - 42) at 37.00 (1.4567)
Valve open 373 - 421 (38.0 - 42.9, 84 - 95) at 27.20 (1.0709)
squareness mm (in) Limit 2.1 (0.083)