Replacing Service Seats - Dodge D250 1990 Service Manual

Alternative Repair Procedures
Page9K-26
Base Engine Components
DODGE Turbo Diesel
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Measure the valve seat width indicated by the lapped surface.
Valve Seat Width Limit
1.50mm Minimum [.060 inch] 2.0mm Maximum [.080 inch]
If required, grind area (A) with a 60 degrees stone and (B) with
a 15 degree stone to center the seat on the valve face.
Maintain the valve seat width limits.
1.5mm Minimum [.060 inch] 2.0mm Maximum [.080 inch]
Replacing Service Seats
To replace service seat inserts, machine the insert in the same manner as if machining out the integral seat. Hold
the same tolerances and follow the same Installation procedures.
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fc^O Grinding the Valves
Q jph Inspect for abnormal wear on the valve heads and stems.
Measure the valve stem diameter.
Valve Stem Diameter Limits
• 7.935mm Minimum [.3126 inch]
• 7.960mm Maximum [.3134 inch]