Dodge 2000 DURANGO Service Manual page 636

9 - 126 5.2L ENGINE
CLEANING AND INSPECTION (Continued)
Fig. 85 Measuring Outer Rotor Thickness
Fig. 86 Measuring Inner Rotor Thickness
Fig. 87 Measuring Outer Rotor Clearance in
1 – PUMP BODY
2 – OUTER ROTOR
3 – FEELER GAUGE
Housing
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).
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).
DN