Nissan and Datsun Workshop Service and Repair Manuals

Valve: Specifications

DIMENSIONS

Face Angle "alpha":  45° 30' 
Head Diameter "D":

Intake:  33.95 - 34.25 mm (1.3366 - 1.3484 inch)
Exhaust:  40.0 - 40.2 mm (1.575 - 1.583 inch)

Length "L":

Intake:  119.9 - 120.2 mm (4.720 - 4.732 inch)
Exhaust:  120.67 - 120.97 mm (4.7508 - 4.7626 inch)

Margin "T":

Standard

Intake:  1.15 - 1.45 mm (0.0453 - 0.0571 inch)
Exhaust:  1.35 - 1.65 mm (0.0531 - 0.0650 inch) 

Limit:  0.5 mm (0.020 inch)

Stem Diameter "d":

Intake:  6.965 - 6.980 mm (0.2742 - 0.2748 inch)
Exhaust:  7.948 - 7.960 mm (0.3129 - 0.3134 inch)

Valve Clearance:  0 mm (0 inch)