Chrysler 1998 Voyager Service Manual page 1072

9 - 22 2.4L ENGINE
SERVICE PROCEDURES (Continued)
Fig. 17 Testing Valve Springs
Intake and Exhaust Valves
(2) Inspect the remaining margin after the valves
are refaced (Fig. 18). Intake valves with less than 1.2
mm (3/64 inch.) margin and Exhaust valves with less
than 0.9 mm (1/32 inch.) margin should be discarded.
(3) 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.
(4) Measure the concentricity of valve seat and
valve guide using a valve seat runout dial indicator.
Total runout should not exceed. 0.051 mm (0.002
inch.) (total indicator reading).
(5) Inspect the valve seat with Prussian blue to
determine 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
pressure. If the blue is transferred to the center of
valve face, contact is satisfactory. If the blue is trans-
ferred to top edge of the valve face, lower valve seat
with a 15 degrees stone. If the blue is transferred to
the bottom edge of valve face raise valve seat with a
65 degrees stone.
VALVE SPECIFICATION CHART
Face Angle
Intake and Exhaust:
Head Diameter
Intake:
Exhaust:
Length (Overall)
Intake:
Exhaust:
Stem Diameter
Intake:
Exhaust:
Valve Margin
Intake:
Exhaust:
• Intake valve seat diameter is 34.37 34.63 mm
(1.158 1.363 inch.)
• Exhaust valve seat diameter is 29.37 29.63 mm
(1.156 1.166 inch.)
(6) Valve seats which are worn or burned can be
reworked, provided that correct angle and seat width
are maintained. Otherwise the cylinder head must be
replaced.
Fig. 18 Refacing Intake and Exhaust Valves
(7) When seat is properly positioned the width of
intake and exhaust seats should be 0.9 to 1.3 mm
(0.35 to 0.051 inch.) (Fig. 19).
(8) Check valve tip height dimensions A after
grinding the valve seats or faces (Fig. 20). Grind
valve tip to 47.99 mm (1.889 in.) for exhaust valve
and 48.04 mm (1.891 in.) for intake valve when
installed in the head. The valve tip chamfer may
NS
44.5°-45°
34.67 - 34.93 mm
(1.364 - 1.375 in.)
30.37 - 30.63 mm
(1.195 - 1.205 in.)
112.76 - 113.32 mm
(4.439 - 4.461 in.)
109.59 - 110.09 mm
(4.314 - 4.334 in.)
5.934 - 5.952 mm
(0.2337 - 0.2344 in.)
5.906 - 5.924 mm
(0.2326 - 0.2333 in.)
1.285 - 1.615 mm
(0.050 - 0.063 in.)
0.985 - 1.315 mm
(0.038 - 0.051 in.)