Chrysler 1998 Voyager Service Manual page 1117

NS
SERVICE PROCEDURES (Continued)
VALVE SPECIFICATION CHART
Valve Dimensions
INTAKE VALVE (MINIMUM)
Stem Diameter: 7.960 mm (0.313 in.)
Face Angle: 45°
Valve Margin: 0.700 mm (0.028 in.)
Length: 103.0 mm (4.055 in.)
EXHAUST VALVE (MINIMUM)
Stem Diameter: 7.930 mm (0.312)
Face Angle: 45°
Valve Margin: 1.50 mm (0.059 in.)
Length: 102.70 mm (4.043 in.)
Valve Guide
Clearance
Intake: 0.03 - 0.06 mm
(0.001 - 0.002 in.)
Exhaust: 0.05 - 0.09 mm
(0.002 - 0.0035 in.)
Valve Springs
Free Length: 49.8 mm (1.960 in.)
Squarness: 2° Maximum
Spring Tension: 33 Kg @ 40.4 mm
(73 lbs. @ 1.59 in.)
Fig. 16 Valve Spring
VALVE SEAT
Fig. 17 Valve Seat Reconditioning
New Service
Limit
0.10 mm
(0.004 in.)
0.15 mm
(0.006 in.)
New Service
Limit
48.8 mm
(1.921 in.)
4° Maximum
Inspect the valve seat with Prussian blue to deter-
mine where the valve contacts the seat. To do this,
coat valve seat LIGHTLY with Prussian blue then
set valve in place. Rotate the valve with light pres-
sure. If the blue is transferred to the center of valve
face, contact is satisfactory. If the blue is transferred
to top edge of the valve face, lower valve seat with a
15 degrees stone. If the blue is transferred to the bot-
tom edge of valve face raise valve seat with a 65
degree stone (Fig. 17).
INSTALLATION
(1) Install valve spring seat.
(2) Using suitable tool install seal by tapping
lightly until seal is in place (Fig. 18).
(3) Install valve spring with the enamelled ends
facing the rocker arms (Fig. 19).
CAUTION: During reassembly, compressing the
valve spring more than necessary to install valve
spring retainer locks can cause the retainer to be
forced against the stem seal and damaging it.
Fig. 18 Install Valve Stem Seals
Fig. 19 Installed Valve Spring Position
3.0L ENGINE 9 - 67