Valve: Specifications

Valve System
Valve Face Angle 45 degrees
Valve Head 0.79 mm - Minimum (1 0.031 inch - Minimum)
Valve Lash Net Lash-No Adjustment
Valve Lift - Exhaust 10.879 mm (0.4280 inch)
Valve Lift - Intake 10.527 mm (0.4140 inch)
Valve Lifter Hydraulic Roller Type
Rocker Arm Roller Pivot Type
Rocker Arm Ratio 1.5:1
Valve Seat Angle 46 degrees
Valve Seat Runout 0.05 mm - Maximum (0.002 inch - Maximum)
Valve Seat Width
Exhaust 1.651 - 2.489 mm (0.065 - 0.098 inch)
Intake 1.016 - 1.651 mm (0.040 - 0.065 inch)
Valve Spring Free Length 51.3 mm (2.02 inch)
Valve Spring Installed Height
Exhaust 42.92 - 43.43 mm (1.670 - 1.700 inch)
Intake 42.92 - 43.43 mm (1.670 - 1.700 inch)
Valve Spring Pressure
Closed 338 - 374 N at 43.2 mm (76 - 84 lbs. at 1.70 inch)
Open 832 - 903 N at 32.3 mm (187 - 203 lbs. at 1.27 inch)
Valve Stem Clearance - Exhaust
Production 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Service 0.025 - 0.094 mm (0.0010 - 0.0037 inch)
Valve Stem Clearance - Intake
Production 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Service 0.025 - 0.094 mm (0.0010 - 0.0037 inch)
Valve Stem Oil Seal installed Height 1 - 2 mm (0.03937 - 0.07874 inch)
(Measured from the Top of the Large Diameter Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal)