Ford Workshop Service and Repair Manuals

Valve: Specifications

Clearance

Lash [1] .............................................................................................................................................................................  2.25-4.79 mm (0.09-0.19 inch)
To Guide

Intake .................................................................................................................................................................  0.026-0.071 mm (0.001-0.0028 inch)
Exhaust ..........................................................................................................................................................  0.038-0.083 mm (0.0015-01.0033 inch)

Face

Angle .........................................................................................................................................................................................................................  45.8°
Margin Thickness

Exhaust and Intake, Minimum ...................................................................................................................................................  0.794 mm (1/32 inch)

Runout, Maximum ...........................................................................................................................................................................  0.05 mm (0.002 inch)

Head Diameter

Intake .................................................................................................................................................................................................  45.3 mm (1.78 inch)
Exhaust ..............................................................................................................................................................................................  37.1 mm (1.46 inch)

Stem Diameter

Standard

Intake ...............................................................................................................................................................  8.694-8.674 mm (0.3423-0.3415 inch)
Exhaust ............................................................................................................................................................  8.682-8.662 mm (0.3418-0.3410 inch)

Oversize,

Intake ...............................................................................................................................................................  9.075-0.055 mm (0.3573-0.3565 inch)
Exhaust ............................................................................................................................................................  9.063-9.043 mm (0.3568-0.3560 inch)

Oversize 

Intake ...............................................................................................................................................................  9.456-9.436 mm (0.3723-0.3715 inch)
Exhaust ............................................................................................................................................................  9.444-0.424 mm (0.3718-0.3710 inch)

Stem Refinishing, Max ....................................................................................................................................................................  0.254 mm (0.010 inch)
Valve Lift @ Zero Lash (Theoretical)

Intake .............................................................................................................................................................................................  10.76 mm (0.424 inch)
Exhaust ..........................................................................................................................................................................................  11.37 mm (0.447 inch)

[1] Collapsed tappet gap: Lifter collapsed and on camshaft base circle.