Dodge RAM 1500 1998 Owner's Manual page 1480

DR
INTAKE/EXHAUST VALVES & SEATS (Continued)
(5) Rotate the compressor nut counter-clockwise to
relieve tension on the springs. Remove the spring
compressor.
(6) Remove the retainers, springs, valve seals (if
necessary), and valves (Fig. 24). Arrange or number
all components so they can be installed in their orig-
inal locations.
(7) Repeat the procedure on all cylinders to be ser-
viced.
Fig. 24 Valve Spring, Seal, and Retainers
1 - VALVE RETAINING LOCKS
2 - VALVE
3 - SEAL
4 - SPRING
5 - RETAINER
CLEANING
Clean the valve stems with crocus cloth or a
Scotch-Brite™ pad. Remove carbon with a soft wire
brush. Clean valves, springs, retainers, and valve
retaining locks in a suitable solvent. Rinse in hot
water and blow dry with compressed air.
INSPECTION
Visually inspect the valves for abnormal wear on
the heads, stems, and tips. Replace any valve that is
worn out or bent (Fig. 25).
Measure the valve stem diameter in three places
as shown in (Fig. 26).
Measure the cylinder head valve guide bore (Fig.
27).
ENGINE 5.9L DIESEL
Fig. 25 Visually Inspect Valves for Abnormal Wear
Fig. 26 Measure Valve Stem Diameter
VALVE STEM DIAMETER
6.96 mm (0.2740 in.) MIN
7.010 mm (0.2760 in.) MAX
VALVE GUIDE BORE SPECIFICATIONS
VALVE GUIDE BORE SPECIFICATIONS
Valve guide bore
diameter
Min.
Max.
Installed valve guide
depth
Intake
Min.
Max.
Exhaust
Min.
Max.
9 - 257
7.027 mm (0.2767 in.)
7.077 mm (0.2786 in.)
0.584 mm ( 0.023 in.)
1.092 mm ( 0.043 in.)
0.965 mm ( 0.028 in.)
1.473 mm (0.058 in.)