Pathfinder XE 2WD V6-3.3L (VG33E) (1997)
Valve Spring: Testing and Inspection
OUT-OF-SQUARE
1. "S" is out-of-square. Measure dimension "S":
Outer spring: less than 2.2 mm (0.087 inch).
Inner spring: less than 1.9 mm (0.075 inch).
2. If it exceeds the limit, replace the spring.
PRESSURE
Check valve spring free height and check the pressure at the specified height.
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Free height is 51.2 mm (2.016 inch) for outer springs and 44.1 mm (1.736 inch) for inner springs.
The standard:
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With a pressure of 523.7 N (117.7 lbs.) the height should be 30.0 mm (1.181 inch.) for the outer springs.
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With a pressure of 255.0 N (57.3 lbs.) the height should be 25.0 mm (.984 inch.) for the inner springs.
The limit:
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The outer spring should need more than 228.5 N (51.4 lbs.) of pressure to obtain a height of 25.0 mm (0.984 inch).
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The inner spring should need more than 225.6 N (50.7 lbs.) of pressure to obtain a height of 25.0 mm (0.984 inch).
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If it exceeds the limit, replace the spring.