Lincoln Workshop Service and Repair Manuals

Valve: Specifications

Clearance

To Guide

Intake .......................................................................................................................................................  0.020-0.069 mm (0.000787-0.002717 inch)
Exhaust ....................................................................................................................................................  0.045-0.095 mm (0.001772-0.003740 inch)

* Lash ...................................................................................................................................................................  0.25-0.65 mm (0.009843-0.025590 inch)
Face

Angle .........................................................................................................................................................................................................................  45.5°
Margin Thickness

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

Runout, Maximum .......................................................................................................................................................................  0.05 mm (0.00197 inch)

Head Diameter  +

Intake ...............................................................................................................................................................................................  44.5 mm (1.752 inch)
Exhaust ............................................................................................................................................................................................  34.0 mm (1.339 inch)

Stem Diameter

Standard

Intake ...............................................................................................................................................................  6.995-6.975 mm (0.2754-0.2746 inch)
Exhaust ............................................................................................................................................................  6.970-6.949 mm (0.2744-0.2736 inch)

Oversize, 0.380 mm (0.015 inch)

Intake ...............................................................................................................................................................  7.376-7.356 mm (0.2904-0.2895 inch)
Exhaust ............................................................................................................................................................  7.351-7.330 mm (0.2894-0.2886 inch)

Oversize, 0.760 mm (0.30 inch)

Intake ...............................................................................................................................................................  7.757-7.737 mm (0.3054-0.3046 inch)
Exhaust ............................................................................................................................................................  7.732-7.711 mm (0.3044-0.3036 inch)

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

Intake .............................................................................................................................................................................................  12.0 mm (0.4724 inch)
Exhaust ..........................................................................................................................................................................................  12.0 mm (0.4724 inch)

* Lifter collapsed and on camshaft base circle.
+ Gauge diameters: 42.5 & 32.0 mm (1.6732 & 1.2598 inch)