F 150 2WD Pickup V8-4.6L SOHC VIN W (1998)
Valve: Specifications
GENERAL SPECIFICATIONS
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 ............................................................................................................................................................. 2.020-0.069 mm (0.00078-0.00272 in.)
Exhaust ................................................................................................................................................................ 0.046-0.095 mm (0.018-0.0037 in.)
Valve Head Diameter
Intake .............................................................................................................................................................................................. 44.5 mm (1.75 in.)
Exhaust ........................................................................................................................................................................................... 34.0 mm (1.34 in.)
Valve Head Diameter Gauge Diameter ................................................................................................................... 42.5 and 32.0 mm (1.67 and 1.26 in.)
Valve Face Runout Limit .................................................................................................................................................................... 0.05 mm (0.002 in.)
Valve Face Angle ............................................................................................................................................................................... 45.25-45.75 degrees
Valve Stem Diameter
Standard
Intake ............................................................................................................................................................. 6.995-6.975 mm (0.275-0.2746 in.)
Exhaust .......................................................................................................................................................... 6.970-6.949 mm (0.274-0.2736 in.)
0.015 Over Size
Intake ............................................................................................................................................................. 7.376-7.356 mm (0.290-0.2896 in.)
Exhaust ............................................................................................................................................................ 7.351-7.330 mm (0.289-0.289 in.)
0.030 Oversize
Intake ............................................................................................................................................................... 7.757-7.737 mm (0.305-0.304 in.)
Exhaust ............................................................................................................................................................ 7.732-7.711 mm (0.288-0.303 in.)
