Installing Service Valve Seats - Dodge D250 1990 Service Manual

Base Engine Components
DODGE Turbo Diesel
Alternative Repair Procedures
Page9K-23
Measure to 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 degree stone and (B) with a
15 degree stone to center the seat on the valve face. Maintain
the valve seat width limits.
Valve Seat Width Limits (1)
1.5mm Minimum [.060 inch] 2.0mm Maximum [.080 inch]
Installing Service Valve Seats
Inspect the valve guide bores as described in the valve guide
section of this manual. If it is necessary to install valve guides,
install the guides before installing the service seats.
Valve Seat Insert
Seat
• Pocket Machining Dimensions, Intake
A = 8.029 ± 0.010mm [.3161 ± .0004 inch]
B = 10.40 ± 0.10mm [.4094 ± .004 inch]
C = 47.00 ± 0.013mm [1.8504 ± .0005 inch] diameter
D = 0.40mm [.0157 inch] maximum radius
E = 3.2 micrometers [128 microinch] surface finish
(Valve Seat insert Part Number 4429854)