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Valves & Valve Springs

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
VALVES & VALVE SPRINGS

Application In. (mm)
Intake Valves
Face Angle 45 Degrees 15 Min.-45 Degrees 45 Min.
Head Diameter 1.4567-1.4685 (37.00-37.30)
Minimum Margin .020 (.50)
Valve Length 3.7941 (96.37)
Stem Diameter .2348-.2354 (5.965-5.980)
Valve Tip Maximum Refinish .008 (.20)
Exhaust Valves
Face Angle 45 Degrees 15 Min.-45 Degrees 45 Min.
Head Diameter 1.228-1.240 (31.20-31.50)
Minimum Margin .020 (.50)
Valve Length 3.6968 (93.90)
Stem Diameter .2344-.2350 (5.955-5.970)
Valve Tip Maximum Refinish .008 (.20)
Valve Springs
Free Length 1.8465 (46.90)
Out-Of-Square .083 (2.10)
Lbs. @ In. (kg @ mm) 
Pressure
Standard 39.7 @ 1.457 (20.6 @ 37.0)
Service Limit 90.1 @1.094 (44.5 @ 27.8)