Chrysler neon 1997 Service Manual page 1256

INNER OUTER ROTOR FEELER GAUGE ROTOR
PL
CLEANING AND INSPECTION (Continued)
Fig. 98 Measuring Inner Rotor Thickness
Fig. 99 Measuring Outer Rotor Clearance in
(6) Install inner rotor into pump housing. If clear-
ance between inner and outer rotors (Fig. 105) is .203
mm (.008 inch) or more, replace both rotors.
Fig. 100 Measuring Clearance Between Rotors
FEELER GAUGE OUTER ROTOR
Housing
FEELER STRAIGHT EDGE GAUGE
(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. 106). ONLY if rotors are in specs.
Fig. 101 Measuring Clearance Over Rotors
(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.
(10) If oil pressure is low and pump is within spec-
ifications, inspect for worn engine bearings, damaged
or missing oil pick-up tube o-ring, clogged oil pick-up
tube screen, clogged oil filter and stuck open pres-
sure relief valve or other reasons for oil pressure
loss.
CYLINDER BLOCK AND BORE
(1) Clean cylinder block thoroughly and check all
core hole plugs for evidence of leaking.
(2) If new core plugs are installed, Refer to Engine
Core Plugs outlined in this section.
(3) Examine block and cylinder bores for cracks or
fractures.
CYLINDER BORE INSPECTION
The cylinder walls should be checked for out-of-
round and taper with Tool C-119 (Fig. 107). The cyl-
inder bore out-of-round is 0.050 mm (.002 inch)
maximum and cylinder bore taper is 0.051 mm (0.002
inch) maximum. If the cylinder walls are badly
scuffed or scored, the cylinder block should be
rebored and honed, and new pistons and rings fitted.
Whatever type of boring equipment is used, boring
and honing operation should be closely coordinated
with the fitting of pistons and rings in order that
2.0L DOHC ENGINE 9 - 85