F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
Valve: Specifications
DIMENSIONS
Valve Arrangement (Front-to-Rear)
Left Hand ............................................................................................................................................................................................. E-I-E-I-E-I-E-I
Right Hand ........................................................................................................................................................................................... I-E-I-E-I-E-I-E
Valve Stem to Guide Clearance
Intake ........................................................................................................................................................... 0.020-0.069 mm (0.00078-0.00272 inch)
Exhaust .............................................................................................................................................................. 0.046-0.095 mm (0.018-0.0037 inch)
Valve Head Diameter
Intake ........................................................................................................................................................................................... 44.5 mm (1.75 inch)
Exhaust ........................................................................................................................................................................................ 34.0 mm (1.34 inch)
Gauge Diameters .................................................................................................................................................. 42.5 and 32.0 mm (1.67 and 1.26 inch)
Valve Face Runout Limit ................................................................................................................................................................. 0.05 mm (0.002 inch)
Valve Face Angle ........................................................................................................................................................................................... 45.5 degrees
Valve Stem Diameter (Std)
Intake ................................................................................................................................................................. 6.995-6.975 mm (0.275-0.2746 inch)
Exhaust .............................................................................................................................................................. 6.970-6.949 mm (0.274-0.2736 inch)
