Dodge 2001 Ram 1500 Owner's Manual page 1286

BR/BE
INTAKE/EXHAUST VALVES & SEATS (Continued)
Fig. 8 Positioning Valve with Tool C-3973
1 - VALVE
2 - SPACER TOOL
(2) Attach dial indicator Tool C-3339 to cylinder
head and set it at right angles to valve stem being
measured (Fig. 9).
Fig. 9 Measuri2ng Valve Guide Wear
1 - VALVE
2 - SPECIAL TOOL C-3339
(3) Move valve to and from the indicator. The total
dial indicator reading should not exceed 0.432 mm
(0.017 in.). Ream the guides for valves with oversize
stems if dial indicator reading is excessive or if the
stems are scuffed or scored.
VALVE GUIDES
Service valves with oversize stems are available.
Refer to REAMER SIZES CHART
REAMER SIZES CHART
REAMER O/S
0.076 mm
(0.003 in.)
0.381 mm
(0.015 in.)
VALVE GUIDE SIZE
8.026 - 8.052 mm
(0.316 - 0.317 in.)
8.331 - 8.357 mm
(0.328 - 0.329 in.)
(1) Slowly turn reamer by hand and clean guide thor-
oughly before installing new valve. Ream the valve
guides from standard to 0.381 mm (0.015 in.). Use
a two 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 43-1/4° to
43-3/4° face angle and a 44-1/4° to 44-3/4° seat angle
(Fig. 10).
Fig. 10 Valve Face and Seat Angles
1 - CONTACT POINT
A,B,C and D Refer to VALVE FACE AND VALVE SEAT ANGLE
CHART
VALVE FACE AND VALVE SEAT ANGLE CHART
ITEM DESCRIPTION
A SEAT WIDTH
INTAKE
EXHAUST
B FACE ANGLE
(INT. AND EXT.)
C SEAT ANGLE
(INT. AND EXT.)
D CONTACT
SURFACE
ENGINE 5.9L 9 - 139
SPECIFICATION
1.016 - 1.524 mm
(0.040 - 0.060 in.)
1.524 - 2.032 mm
(0.060 - 0.080 in.)
43¼° - 43¾°
44¼° - 44¾°
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