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Inspect Oil Pump and Replace on Dodge Dakota?

The procedure for oil pump inspecting and how to replace oil pump.

All this details are provided with required details and helpful diagrams.

The complete procedure is as follows: -----


Inspection




WARNING
Oil pump pressure relief valve and spring should not be removed from the oil pump. If these components are disassembled and or removed from the pump the entire oil pump assembly must be replaced.

  1. Clean all parts thoroughly. Mating surface of the oil pump housing should be smooth. If the pump cover is scratched or grooved the oil pump assembly should be replaced.
  2. Lay a straight edge across the pump cover surface. If a 0.025 mm (0.001 in.) feeler gauge can be inserted between the cover and the straight edge the oil pump assembly should be replaced.
  3. Measure the thickness of the outer rotor. If the outer rotor thickness measures at 12.005 mm (0.472 in.) or less the oil pump assembly must be replaced.
  4. Measure the diameter of the outer rotor. If the outer rotor diameter measures at 85.925 mm (3.382 in.) or less the oil pump assembly must be replaced.
  5. Measure the thickness of the inner rotor. If the inner rotor thickness measures at 12.005 mm (0.472 in.) or less then the oil pump assembly must be replaced.
  6. Slide outer rotor into the body of the oil pump. Press the outer rotor to one side of the oil pump body and measure clearance between the outer rotor and the body. If the measurement is 0.235mm (0.009 in.) or more the oil pump assembly must be replaced.
  7. Install the inner rotor in the into the oil pump body. Measure the clearance between the inner and outer rotors. If the clearance between the rotors is .150 mm (0.006 in.) or more the oil pump assembly must be replaced.
  8. Place a straight edge across the body of the oil pump (between the bolt holes); if a feeler gauge of .095 mm (0.0038 in.) or greater can be inserted between the straightedge and the rotors, the pump must be replaced. 
    NOTE
    The 3.7L/4.7L oil pump is released as an assembly; there are no subassembly components. In the event the oil pump is not functioning or out of specification it must be replaced as an assembly.


    image
    Fig. Checking oil pump cover plate


    image
    Fig. Measuring outer rotor thickness


    Click image to see an enlarged view
    Fig. Measuring inner rotor thickness


    Click image to see an enlarged view
    Fig. Measuring clearance between pump housing and outer rotor


    Click image to see an enlarged view
    Fig. Measuring clearance between inner and outer rotor


    Click image to see an enlarged view
    Fig. Measuring clearance between rotors and pump body cover

Removal & Installation



3.7L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2. Remove or disconnect the following:

    Oil Pan
    Timing chain cover
    Timing chains and tensioners
    Oil pump
  3. Installation is the reverse of removal. Torque the pump bolts, in sequence, to 21 ft. lbs. (28 Nm), 

    image
    Fig. Oil pump bolt torque sequence-3.7L and 4.7L engines
4.7L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2. Drain the engine oil.
  3. Remove or disconnect the following:

    Negative battery cable
    Oil pan
    Oil pump pick-up tube
    Timing chains and tensioners
    Oil pump
To install:
  1. Install or connect the following:

    Oil pump. Tighten the bolts to 21 ft. lbs. (28 Nm).
    Timing chains and tensioners
    Oil pump pick-up tube
    Oil pan
    Negative battery cable
  2. Fill the crankcase to the correct level.
  3. Start the engine and check for leaks.


These details will help.
Thanks.           

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html


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