D 350 Pickup L6-359 5.9L DSL (1989)
Valve: Service and Repair
GRINDING THE VALVES
Inspect for abnormal wear on the valve heads and stems.
Measure the valve stem diameter.
Valve Stem Diameter Limits
7.935 mm Minimum [0.3126 inch] 7.960 mm Maximum [0.3134 inch]
Reface all reused valves. Replace bent valves.
Seat Angle
Intake: 30 degrees
Exhaust: 45 degrees
