Chrysler 1998 Voyager, Service Manual, Page: 1106 / 1938

Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232°
Valve Timing – Exhaust Valve
Closes (ATDC) . . . . . . . . . . . . . . . . . . . . . . . . . . .8°
Opens (BBDC) . . . . . . . . . . . . . . . . . . . . . . . . . .52°
Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240°
Valve Timing
Valve Overlap . . . . . . . . . . . . . . . . . . . . . . . . . . .9°
Cylinder Head
Material . . . . . . . . . . . . . . . . . . . . .Cast Aluminum
Gasket Thickness (Compressed) . . . . . . . .1.15 mm
(0.045 in.)
Cylinder Head Valve Seat
Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45°
Runout (Max.). . . . . . . . . . . . .0.050 mm (0.002 in.)
Width (Finish) Intake and Exhaust. . .0.9 - 1.3 mm
(0.035 - 0.051 in.)
Guide Bore Diameter (Std). . . . . . .11.0 - 11.02 mm
(0.4330 - 0.4338 in.)
Finish Guide Bore ID. . . . . . . . . .5.975 - 6.000 mm
(0.235 - 0.236 in.)
Valves
Face Angle . . . . . . . . . . . . . . . . . . . . . .44-1/2° - 45°
Head Diameter Intake . . . . . . . . .34.67 - 34.93 mm
(1.364 - 1.375 in.)
Head Diameter Exhaust . . . . . . .30.37 - 30.63 mm
(1.195 - 1.205 in.)
Length–Intake (Overall) . . . . . .112.76 - 113.32 mm
(4.439 - 4.461 in.)
Length–Exhaust (Overall) . . . .109.59 - 110.09 mm
(4.314 - 4.334 in.)
Valve Margin–Intake . . . . . . . . . .1.285 - 1.615 mm
(0.050 - 0.063 in.)
Valve Margin–Exhaust . . . . . . . .0.985 - 1.315 mm
(0.038 - 0.051 in.)
Valve Stem Tip Height–Intake . . . . . . . .48.04 mm
(1.891 in.)
Valves
Valve Stem Tip Height–Exhaust . . . . . . .47.99 mm
(1.889 in.)
Stem Diameter–Intake . . . . . . . .5.934 - 5.952 mm
(0.234 - 0.234 in.)
Stem Diameter–Exhaust . . . . . . .5.906 - 5.924 mm
(0.233 - 0.233 in.)
Stem-to-Guide
Clearance–Intake . . . . . . . . . . . .0.048 - 0.066 mm
(0.0018 - 0.0025 in.)
Stem-to-Guide
Clearance–Exhaust . . . . . . . . . .0.0736 - 0.094 mm
(0.0029 - 0.0037 in.)
Max. Allowable Stem-to-Guide
Clearance–Intake and Exhaust . . . . . . .0.025 mm
(0.010 in.)
Valve Springs
Free Length (Approx.) . . . . . . .48.4 mm (1.905 in.)
Spring Tension
(Valve Closed) . . . . . . . . .338 N
6
20 N @ 38.0 mm
(75.98 lbs.
6
4.5 lbs. @ 1.496 in.)
Spring Tension
(Valve Open) . . . . . . . . .607 N
6
30 N @ 29.75 mm
(136 lbs.
6
7 @ 1.172 in.)
Number of Coils . . . . . . . . . . . . . . . . . . . . . . . .7.82
Wire Diameter . . . . . . . . . . . . .3.86 mm (0.151 in.)
Installed Spring Height . . . . .38.00 mm (1.496 in.)
Oil Pump
Clearance Over Rotors (Max.). .0.10 mm (0.004 in.)
Cover Out-of-Flat (Max.). . . . .0.025 mm (0.001 in.)
Inner Rotor Thickness (Min.) . .9.40 mm (0.370 in.)
Outer Rotor (Oil Pump)
Clearance (Max.) . . . . . . . . . . .0.39 mm (0.015 in.)
Diameter (Min.) . . . . . . . . . . .79.95 mm (3.148 in.)
Thickness (Min.) . . . . . . . . . . . .9.40 mm (0.370 in.)
Tip Clearance Between Rotors (Max.) . . . .0.20 mm
(0.008 in.)
Oil Pressure
At Curb Idle Speed* . . . . . . . . . . . . .25 kPa (4 psi)
At 3000 rpm . . . . . . . . .170 - 550 kPa (25 - 80 psi)
CAUTION: * If pressure is ZERO at curb Idle, DO
NOT run engine at 3,000 rpm.
9 - 56 2.4L ENGINE
NS
SPECIFICATIONS (Continued)