Valve, Intake/Exhaust

Valve Face Angle 45 degrees
Valve Head Edge Margin 0.79 mm (Minimum) (10.031 inch (Minimum))
Valve Lash Rotate the Valve Rocker Arm Nut Clockwise 360 degrees (1 Turn) from Zero Lash
Valve Lifter Hydraulic Roller
Valve 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-Heavy Duty) 1.50 - 2.56 mm (0.059 - 0.101 inch)
Valve Seat Width (Exhaust-Light Duty) 1.65 - 2.49 mm (0.065 - 0.098 inch)
Valve Seat Width (Intake) 1.02 - 1.65 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 (1.67 - 1.70 inch)
Valve Spring Installed Height (Intake) 42.92 - 43.43 mm (1.67 - 1.70 inch)
Valve Spring Pressure (Closed) 338 - 374 N at 43.2 (76 - 84 lbs. at 1.70)
Valve Spring Pressure (Open) 832 - 903 N at 32.3 (187 - 203 lbs. at 1.27)
Valve Stem Clearance (Exhaust-Production) 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Valve Stem Clearance (Intake-Production) 0.025 - 0.069 mm (0.0010 - 0.0027 inch)
Valve Stem Clearance (Exhaust-Service) 0.025 - 0.094 mm (0.00 10 - 0.0037 inch)
Valve Stem Clearance (Intake-Service) 0.025 - 0.094 mm (0.0010 - 0.0037 inch)
Valve Stem Diameter 8.661 - 8.679 mm (0.3410 - 0.3416 inch)
Valve Stem Oil Seal Installed Height (Measured from the Top of Large Valve Guide Bevel to the Bottom of the Valve Stem Oil Seal) 1 - 2 mm (0.03937 - 0.07874 inch)