Refacing Valves And Valve Seats; Valve Face And Valve Seat Angle Chart - Dodge 2001 Ram 1500 Owner's Manual

9 - 26 ENGINE 3.9L
INTAKE/EXHAUST VALVES & SEATS (Continued)

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. 11).
Fig. 11 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
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°
—
VALVES
Inspect the remaining margin after the valves are
refaced (Fig. 12). Valves with less than 1.190 mm
(0.047 in.) margin should be discarded.
Fig. 12 Intake and Exhaust Valves
1 - MARGIN
2 - VALVE SPRING RETAINER LOCK GROOVE
3 - STEM
4 - FACE
VALVE SEATS
CAUTION: DO NOT un-shroud valves during valve
seat refacing (Fig. 13).
Fig. 13 Refacing Valve Seats
1 - STONE
2 - PILOT
3 - VALVE SEAT
4 - SHROUD
BR/BE