Dodge 2001 Ram 1500 Owner's Manual page 1343

9 - 196 ENGINE 8.0L
INTAKE/EXHAUST VALVES & SEATS (Continued)
Fig. 16 Measuring Valve Guide Wear
1 - VALVE
2 - SPECIAL TOOL C-3339
REAMER SIZE CHART
REAMER O/S
0.076 mm
(0.003 in.)
0.381 mm
(0.015 in.)
(5) Slowly turn reamer by hand and clean guide
thoroughly before installing new valve. Ream the
valve guides from standard to 0.381 mm (0.015
inch). Use a 2 step procedure so the valve
guides are reamed true in relation to the valve
seat:
• Step 1—Ream to 0.0763 mm (0.003 inch).
• Step 2—Ream to 0.381 mm (0.015 inch).
REFACING VALVES AND VALVE SEATS
The intake and exhaust valves have a 45° face
angle and a 45° to 44 1/2° seat angle (Fig. 17).
VALVE GUIDE SIZE
8.026 - 8.052 mm
(0.316 - 0.317 in.)
8.331 - 8.357 mm
(0.316 - 0.329 in.)
Fig. 17 Valve Face and Seat Angles
1 - CONTACT POINT
VALVE FACE AND SEAT ANGLES CHART
ITEM DESCRIPTION
A SEAT WIDTH
SEAT WIDTH
B FACE ANGLE
(INT. and EXT.)
C SEAT ANGLE
(INT. and EXT.)
D CONTACT
SURFACE
VALVES
Inspect the remaining margin after the valves are
refaced (Fig. 18). Valves with less than 1.190 mm
(0.047 inch) margin should be discarded.
VALVE SEATS
(1) When refacing valve seats, it is important that
the correct size valve guide pilot be used for reseat-
ing stones. A true and complete surface must be
obtained.
(2) Measure the concentricity of valve seat using a
dial indicator. Total runout should not exceed 0.038
mm (0.0015 inch) total indicator reading.
BR/BE
SPECIFICATION
1.016 - 1.524
mm
INTAKE (0.040 - 0.060
in.)
1.016 - 1.524
mm
EXHAUST (0.040 - 0.060
in.)
45°
44½°
—