Dodge Nitro. Manual - part 134

Fig. 265: Measuring Outer Rotor Clearance In Housing 
Courtesy of CHRYSLER LLC 

6. Slide outer rotor (2) into body, press to one side with fingers and measure clearance between rotor and 

body. If measurement is 0.39 mm (0.015 inch.) or more, replace body only if outer rotor is in 
specifications. See Fig. 265. 

1 - FEELER GAUGE
2 - OUTER ROTOR

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 266: Measuring Clearance Between Rotors 
Courtesy of CHRYSLER LLC 

7. Install inner rotor into body. If clearance between inner (3) and outer rotors (2) is 0.20 mm (0.008 inch.) 

or more, replace both rotors. See Fig. 266. 

1 - FEELER GAUGE
2 - OUTER ROTOR
3 - INNER ROTOR

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 267: Measuring Clearance Over Rotors 
Courtesy of CHRYSLER LLC 

8. Place a straightedge (1) across the face of the body, between bolt holes. If a feeler gauge of 0.077 mm 

(0.003 in.) or more can be inserted between rotors and the straightedge, replace pump assembly. See Fig. 
267. ONLY if rotors are in specs.  

9. Assemble oil pump. See ASSEMBLY.  

ASSEMBLY 

PUMP-OIL 

1 - STRAIGHT EDGE
2 - FEELER GAUGES

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro

  

Fig. 268: Oil Pump Body, Oil Pump Outer Rotor, Screws, Oil Pump Cover & Oil Pump Inner Rotor 
Courtesy of CHRYSLER LLC 

1. Assemble oil pump using new parts as required.  

2. Tighten cover screws (3) to 12 N.m (105 in. lbs.). See Fig. 268.  

3. Prime oil pump before installation by filling rotor cavity with engine oil.  

4. If oil pressure is low and pump is within specifications, inspect for worn engine bearings or other reasons 

for oil pressure loss.  

1 - OIL PUMP BODY
2 - OIL PUMP OUTER ROTOR
3 - SCREWS
4 - OIL PUMP COVER
5 - OIL PUMP INNER ROTOR

 

2007 Dodge Nitro R/T 

2007 ENGINE 4.0L - Service Information - Nitro