How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Jerry Your Own Question
Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
Type Your Dodge Question Here...
Jerry is online now
A new question is answered every 9 seconds

How to replace the oil pump on a 2003 dodge caravan 3.3l

Customer Question

how to replace the oil pump on a 2003 dodge caravan 3.3l
Submitted: 1 year ago.
Category: Dodge
Expert:  roy replied 1 year ago.

good evening my name is ***** ***** I will assist

I posted the process from alldata.

let me know if you have any questions


The oil pump is contained within the timing chain cover housing (Fig. 111).

  1. Remove oil pan.
  2. Remove the timing chain cover.
  3. Disassemble oil pump from timing chain cover.
  4. Clean and Inspect oil pump components.


  1. Remove oil pump cover screws, and lift off cover (Fig. 111).
  2. Remove oil pump rotors (Fig. 111).
  3. Clean and inspect oil pump components.


  1. Clean all parts thoroughly in a suitable solvent.


  1. Inspect mating surface of the chain case cover. Surface should be smooth. Replace cover if scratched or grooved.


  1. Lay a straightedge across the pump cover surface (Fig. 112). If a 0.025 mm (0.001 in.) feeler gauge can be inserted between cover and straight edge, cover should be replaced.


  1. Measure thickness and diameter of outer rotor. If outer rotor thickness measures 7.64 mm (0.301 in.) or less (Fig. 113), or if the diameter is 79.95 mm (3.148 in.) or less, replace outer rotor.


  1. If inner rotor thickness measures 7.64 mm (0.301 in.) or less, replace inner rotor (Fig. 114).


  1. Install outer rotor into chain case cover. Press rotor to one side with fingers and measure clearance between rotor and chain case cover (Fig. 115). If measurement is 0.39 mm (0.015 in.) or more, replace chain case cover, only if outer rotor is in specification.


  1. Install inner rotor into chain case cover. If clearance between inner and outer rotors (Fig. 116) is 0.203 mm (0.008 in.) or more, replace both rotors.


  1. Place a straightedge across the face of the chain case cover, between bolt holes. If a feeler gauge of 0.10 mm (0.004 in.) or more can be inserted between rotors and the straightedge, replace pump assembly (Fig. 117). ONLY if rotors are in specs.
  2. Remove oil pressure relief valve.


  1. Inspect oil pressure relief valve and bore. Inspect for scoring, pitting and free valve operation in bore (Fig. 118). Small marks may be removed with 400-grit wet or dry sandpaper.
  2. The relief valve spring has a free length of approximately 49.5 mm (1.95 inches) it should test between 19.5 and 20.5 pounds when compressed to 34 mm (1-11/32 inches) . Replace spring that fails to meet specifications.
  3. If oil pressure is low and pump is within specifications, inspect for worn engine bearings or other reasons for oil pressure loss.


  1. Assemble pump, using new parts as required. Install the inner rotor with chamfer facing the cast iron oil pump cover.
  2. Prime oil pump before installation by filling rotor cavity with engine oil.
  3. Install cover and tighten screws to 12 Nm (105 in. lbs.).
  4. If removed, install the oil pressure relief valve.


  1. Install oil pump.
  2. Install timing chain cover and oil pan.
Expert:  roy replied 1 year ago.

how are you making out