General Valve Specifications

GENERAL SPECIFICATIONS

Valves
Valve Face Angle 44.25 degrees
Valve Face Runout 0.038 mm (0.0015 inch)
Valve Face Width - Exhaust 2.750 mm ( 0.1083 inch)
Valve Face Width - Intake 2.180 mm (0.0858 inch)
Valve Head Diameter - Exhaust 30.470-30.730mm (1.1996-1.2098 inch)
Valve Head Diameter - Intake 36.830-37.090 mm (1.4500-1.4602 inch)
Valve Installed Height 35.23-36.69 mm (1.3870-1.4445 inch)
Valve Length - Exhaust 97.110 mm (3.8232 inch)
Valve Length - Intake 101.230 mm (3.9854 inch)
Valve Seat Angle - Seating Surface 45 degrees
Valve Seat Angle - Relief Surface 30 degrees
Valve Seat Angle - Undercut Surface 60 degrees
Valve Seat Runout - Maximum 0.050 mm (0.0020 inch)
Valve Seat Width - Exhaust Seating Surface 1.400-1.800 mm (0.0551-0.0709 inch)
Valve Seat Width - Exhaust Relief Surface 0.700-0.900 mm (0.0276-0.0354 inch)
Valve Seat Width - Intake Seating Surface 1.000-1.400 mm (0.0394-0.0551 inch)
Valve Seat Width - Intake Relief Surface 0.500-0.700 mm (0.0197-0.0276 inch)
Valve Stem Diameter - Exhaust 5.945-5.965 mm (0.2341-0.2348 inch)
Valve Stem Diameter - Intake 5.955-5.975 mm (0.2344-0.2352 inch)
Valve Stem-to-Guide Clearance - Exhaust 0.035-0.075 mm (0.0014-0.0030 inch)
Valve Stem-to-Guide Clearance - Intake 0.025-0.065 mm (0.0010-0.0026 inch)

Valve Lifters
Valve Lifter Diameter 11.489-12.000 mm (0.4523-0.4724 inch)
Valve Lifter-to-Bore Clearance 0.037-0.041 mm0.0015-0.0016 inch)

Rocker Arms
Valve Rocker Arm Ratio 1.68 to 1
Valve Rocker Arm Roller Diameter 17.750-17.800 mm0.6988-0.7008 inch)

Valve Springs
Valve Spring Coil Thickness 3.25O x 3.900 mm (0.1280 x 0.1535 inch)
Valve Spring Diameter - Inside Top 12.090-12.590 mm (0.4760-0.4957 inch)
Valve Spring Diameter - Outside Top 20.140 mm (0.7929 inch)
Valve Spring Diameter - Inside Bottom 17.950-18.450 mm (0.7067-0.7264 inch)
Valve Spring Diameter - Outside Bottom 26.000 mm (1.0236 inch)
Valve Spring Free Length 42.050-44.850 mm (1.6555-1.7657 inch)
Valve Spring Installed Height -Closed 35.000 mm (1.3779 inch)
Valve Spring Installed Height -Open 24.000 mm (0.9449 inch)
Valve Spring Load - Closed 247-273 N 56-61 lb
Valve Spring Load - Open 598-662 N 134-149 lb
Valve Spring Total Number of Coils 7.1