Xterra XE 4WD V6-3.3L SC (VG33ER) (2002)
Valve Spring: Testing and Inspection
VALVE SPRING
Squareness
1. Measure "S" dimension. Out-of-square:
Outer: .................................................................................................................................................................. Less than 2.2 mm (0.087 inch)
Inner: .................................................................................................................................................................... Less than 1.9 mm (0.075 inch)
2. If it exceeds the limit, replace spring.
Pressure
Check valve spring pressure.
Standard pressure:
Outer: ..................................................................................................................................... 523.7 N (53.4 kg, 117.7 lb.) at 30.0 mm (1.181 inch)
Inner: ....................................................................................................................................... 255.0 N (26.0 kg, 57.3 lb.) at 25.0 mm (0.984 inch)
Limit pressure:
Outer: .................................................................................................................... More than 228.5 N (23.3 kg, 51.4 lb.) at 25.0 mm (0.984 inch)
Inner: .................................................................................................................... More than 225.6 N (23.0 kg, 50.7 lb.) at 25.0 mm (0.984 inch)
If not within specification, replace spring.