Dodge 2000 DURANGO Service Manual page 694

9 - 184 5.9L ENGINE
CLEANING AND INSPECTION (Continued)
Slide outer rotor into pump body. Press rotor to the
side with your fingers and measure clearance
between rotor and pump body (Fig. 87). If clearance
is 0.356 mm (0.014 inch) or more, replace oil pump
assembly.
Fig. 87 Measuring Outer Rotor Clearance in
1 – PUMP BODY
2 – OUTER ROTOR
3 – FEELER GAUGE
Install inner rotor and shaft into pump body. If
clearance between inner and outer rotors is 0.203
mm (0.008 inch) or more, replace shaft and both
rotors (Fig. 88).
Fig. 88 Measuring Clearance Between Rotors
1 – OUTER ROTOR
2 – FEELER GAUGE
3 – INNER ROTOR
Place a straightedge across the face of the pump,
between bolt holes. If a feeler gauge of 0.102 mm
(0.004 inch) or more can be inserted between rotors
and the straightedge, replace pump assembly (Fig.
89).
Housing
Fig. 89 Measuring Clearance Over Rotors
1 – STRAIGHT EDGE
2 – FEELER GAUGE
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.
The relief valve spring has a free length of approx-
imately 49.5 mm (1.95 inches). The spring should
test between 19.5 and 20.5 pounds when compressed
to 34 mm (1-11/32 inches). Replace spring that fails
to meet these specifications (Fig. 90).
If oil pressure was low and pump is within specifi-
cations, inspect for worn engine bearings or other
reasons for oil pressure loss.
Fig. 90 Proper Installation of Retainer Cap
1 – RETAINER CAP
2 – CHAMFER
3 – COTTER KEY
DN