Nissan and Datsun Workshop Service and Repair Manuals

Valve Seat: Specifications

DIMENSIONS

Contacting Width (W)

Standard

Intake:  1.6 - 1.7 mm (0.063 - 0.067 inch)
Exhaust:  1.7 - 2.1 mm (0.067 - 0.083 inch)

Service

Intake:  1.6 - 1.7 mm (0.063 - 0.067 inch)
Exhaust:  1.7 - 2.1 mm (0.067 - 0.083 inch)

Cylinder Head Seat Recess Diameter

Standard

Intake:  36.000 - 36.016 mm (1.4173 - 1.4179 inch)
Exhaust:  42.000 - 42.016 mm (1.6535 - 1.6542 inch)

Service

Intake:  36.500 - 36.516 mm (1.4370 - 1.4376 inch)
Exhaust:  42.500 - 42516 mm (1.6732 - 1.6739 inch)

Face Angle (a)

Standard And Service:  45 degrees

Valve Seat Outer Diameter (D1)

Standard

Intake:  36.080 - 36. 96 mm (1.4205 - 1.4211 inch)
Exhaust:  42.080 - 42.096 mm (1.6567 - 1.6573 inch)

Service

Intake:  36.580 - 36.596 mm (1.4402 - 1.4408 inch)
Exhaust:  42.580 - 42.596 mm (1.6764 - 1.6770 inch)