Chrysler 1997 Stratus Convertible LHD, Service Manual, Page: 781 / 1196

(2) Measure valve stems for wear. Measure stem
about 60 mm beneath the valve lock grooves.
(3) If valve stems are worn more than 0.05 mm
(.002 in.), replace valve.
VALVE SPRINGS
(1) Whenever valves have been removed for
inspection, reconditioning or replacement, valve
springs should be tested for correct tension. Discard
the springs that do not meet specifications. The fol-
lowing
specifications apply to both intake and
exhaust valves springs:
•
Valve Closed Nominal Tension— 76 ft. lbs. @
38.0 mm (1.50 in.)
•
Valve Open Nominal Tension— 136 ft. lbs. @
29.75 mm (1.17 in.)
(2) Inspect each valve spring for squareness with
a steel square and surface plate, test springs from
both ends. If the spring is more than 1.5 mm (1/16
inch) out of square, install a new spring.
OIL PUMP
(1) Clean all parts thoroughly. Mating surface of
the oil pump should be smooth (Fig. 92). Replace
pump cover if scratched or grooved.
(2) Lay a straightedge across the pump cover sur-
face (Fig. 93). If a .076 mm (.003 inch) feeler gauge
can be inserted between cover and straight edge,
cover should be replaced.
(3) Measure thickness and diameter of outer rotor.
If outer rotor thickness measures 9.40 mm (0.370
inch.) or less (Fig. 94), or if the diameter is 79.95 mm
(3.148 inches.) or less, replace outer rotor.
(4) If inner rotor measures 9.40 mm (.370 inch.)
or less replace inner rotor (Fig. 95).
(5) Slide outer rotor into pump housing, press to
one side with fingers and measure clearance between
rotor and housing (Fig. 96). If measurement is 0.39
mm (0.015 inch.) or more, replace housing only if
outer rotor is in specification.
(6) Install inner rotor into pump housing. If clear-
ance between inner and outer rotors (Fig. 97) is .203
mm (.008 inch) or more, replace both rotors.
(7) Place a straightedge across the face of the
pump housing, between bolt holes. If a feeler gauge
of .102 mm (.004 inch) or more can be inserted
between rotors and the straightedge, replace pump
assembly (Fig. 98), ONLY if rotors are in specs.
(8) Inspect oil pressure relief valve plunger for
scoring and free operation in its bore. Small marks
may be removed with 400 grit wet or dry sandpaper.
(9) The relief valve spring has a free length of
approximately 60.7 mm (2.39 inches) it should test
between 18 and 19 pounds when compressed to 40.5
mm (1.60 inches). Replace spring that fails to meet
specifications.
Fig. 91 Valve Guide Height
VALVE GUIDE SPRING HEAT 13.25 - 13.75 MM (.521 - .541 IN.)
Fig. 92 Oil Pump
O-RING SEAL INNER ROTOR ROTOR OIL PUMP COVER FASTENER OUTER ROTOR OIL PUMP BODY
Fig. 93 Checking Oil Pump Cover Flatness
STRAIGHT EDGE FEELER GAUGE OIL PUMP COVER
JX
2.4L ENGINE 9 - 45
CLEANING AND INSPECTION (Continued)