G35 Sedan 2WD V6-3.5L (VQ35DE) (2005)
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Check valve spring pressure at specified spring height.
Standard:
Intake and exhaust
Free height: 47.07 mm (1.8531 inch)
Installation height: 37.0 mm (1.457 inch)
Installation load: 166 - 188 N (16.9 - 19.2 kgf, 37.3 - 42.3 lbs.)
Height during valve open
: 27.2 mm (1.071 inch)
Load with valve open: 373 - 421 N (38.0 - 42.9 kgf, 83.9 - 94.6 lbs.)
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If the installation load or load with valve open is out of the standard, replace valve spring.
Valve Spring