Mercedes-Benz Cars 2000-05

Oil Pump

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Oil pan
     
    Oil pump sprocket
     
    Oil pump
     

  4.  

To install:



Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting-Diesel engine

  1. Install or connect the following:

    Oil pump. Torque to 18 ft. lbs. (25 Nm).
     
    Sprocket and chain
     

  2.  


NOTE
Mount the sprocket so that the rise points toward the oil pump and so that the trochoid shape corresponds with that on the oil pump shaft.



Oil pan
 
Engine oil
 

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the lower oil pan. Refer to the oil pan procedure in this section.
  4.  
  5. Push the chain tensioner back and remove the pump drive chain.
  6.  
  7. Unbolt and remove the oil pump.
  8.  

To install:

  1. Fill the oil pump with clean engine oil and install it to the engine. Tighten the bolts to 15 ft. lbs. (20 Nm).
  2.  
  3. Install the pump drive chain.
  4.  
  5. Install the lower oil pan. Refer to the oil pan procedure in this section.
  6.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Oil pan
     
    Oil pump sprocket
     
    Oil pump
     

  4.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting-Diesel engine

  1. Install or connect the following:
    NOTE
    Mount the sprocket so that the rise points toward the oil pump and so that the trochoid shape corresponds with that on the oil pump shaft.



    Oil pump. Torque to 18 ft. lbs. (25 Nm).
     
    Sprocket and chain
     



    Oil pan
     
    Engine oil
     

  2.  

2.8L, 3.2L, 3.6L (104), 2.2L, 2.3L (111), 3.2L (112) And 4.3L (113) Engines


Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-except 3.2L (112) and 4.3L (113) engines

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.

  1. Install the oil pump and tighten the mounting bolts as follows:

    M6 bolts: 88 inch lbs. (9 Nm)
     
    M8 bolts: 15 ft. lbs. (21 Nm)
     

  2.  
  3. Install or connect the following:

    Oil pump drive gear. Torque the bolt to 24 ft. lbs. (32 Nm)
     
    Oil pan
     
    Engine oil

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump mounting and related component-3.2L (112) and 4.3L (113) engines

     

  4.  



Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-except 3.2L (112) and 4.3L (113) engines

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.

  1. Install the oil pump and tighten the mounting bolts as follows:

    M6 bolts: 88 inch lbs. (9 Nm)
     
    M8 bolts: 15 ft. lbs. (21 Nm)
     

  2.  
  3. Install or connect the following:

    Oil pump drive gear. Torque the bolt to 24 ft. lbs. (32 Nm)
     
    Oil pan
     
    Engine oil

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump mounting and related component-3.2L (112) and 4.3L (113) engines

     

  4.  

3.2L (104), 1.8L, 2.3L (111), 2.6L, 2.8L, 3.2L (112) And 4.3L, 5.0L, 5.5L (113) Engines


Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-1.8L and 2.3L (111) engines



Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-2.6L, 2.8L, 3.2L (112) and 4.3L, 5.0L, 5.5L (113) engines

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.

  1. Install the oil pump and tighten the mounting bolts as follows:

    M6 bolts: 88 inch lbs. (9 Nm)
     
    M8 bolts: 15 ft. lbs. (21 Nm)
     

  2.  
  3. Install or connect the following:

    Oil pump drive gear. Torque the bolt to 24 ft. lbs. (32 Nm).
     
    Oil pan
     
    Engine oil
     

  4.  


    Click image to see an enlarged view

    Fig. Exploded view of the oil pump mounting and related component-3.2L (112) and 4.3L (113) engines


4.2L And 5.0L (119) Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Ground straps
     
    Automatic transmission oil line bracket
     
    Oil level control hose
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump
     

  4.  


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.



Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-4.2L and 5.0L (119) engines

To install:

  1. Install or connect the following:

    Oil pump. Torque the mounting bolts to 15 ft. lbs. (21 Nm).
     
    Oil pump drive gear. Torque the mounting bolt to 24 ft. lbs. (28 Nm).
     
    Oil pan
     
    Oil level control hose
     
    Automatic transmission oil line bracket
     
    Ground straps
     
    Engine oil
     

  2.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Be sure to replace any O-rings or seals between the oil pump and engine block.



    Ground straps
     
    AutoMatic transmission oil line bracket
     
    Oil level control hose
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump
     

  4.  

To install:

  1. Install or connect the following:

    Oil pump. Torque the mounting bolts to 15 ft. lbs. (21 Nm)
     
    Oil pump drive gear. Torque the mounting bolt to 24 ft. lbs. (28 Nm)
     
    Oil pan
     
    Oil level control hose
     
    AutoMatic transmission oil line bracket
     
    Ground straps
     
    Engine oil
     

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Be sure to replace any O-rings or seals between the oil pump and engine block.



    Ground straps
     
    AutoMatic transmission oil line bracket
     
    Oil level control hose
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump
     

  4.  

To install:

  1. Install or connect the following:

    Oil pump. Torque the mounting bolts to 15 ft. lbs. (21 Nm)
     
    Oil pump drive gear. Torque the mounting bolt to 24 ft. lbs. (28 Nm)
     
    Oil pan
     
    Oil level control hose
     
    AutoMatic transmission oil line bracket
     
    Ground straps
     
    Engine oil
     

  2.  

6.0L (120) Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine oil
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.

To install:

  1. Install or connect the following:

    Oil pump. Torque the M6 bolts to 88 inch lbs. (9 Nm) and the M8 bolts to 15 ft. lbs. (21 Nm).
     
    Oil pump drive gear with curved face towards pump. Torque the mounting bolt to 24 ft. lbs. (28 Nm).
     
    Oil pan
     
    Engine oil
     

  2.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Be sure to replace any O-rings or seals between the oil pump and engine block.



    Negative battery cable
     
    Engine oil
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:

  1. Install or connect the following:

    Oil pump. Torque the M6 bolts to 88 inch lbs. (9 Nm) and the M8 bolts to 15 ft. lbs. (21 Nm)
     
    Oil pump drive gear with curved face towards pump. Torque the mounting bolt to 24 ft. lbs. (28 Nm)
     
    Oil pan
     
    Engine oil
     

  2.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Be sure to replace any O-rings or seals between the oil pump and engine block.



    Negative battery cable
     
    Engine oil
     
    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:

  1. Install or connect the following:

    Oil pump. Torque the M6 bolts to 88 inch lbs. (9 Nm) and the M8 bolts to 15 ft. lbs. (21 Nm)
     
    Oil pump drive gear with curved face towards pump. Torque the mounting bolt to 24 ft. lbs. (28 Nm)
     
    Oil pan
     
    Engine oil
     

  2.  

Diesel Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Oil pan
     
    Oil pump sprocket
     
    Oil pump
     

  4.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting-Diesel engine

  1. Install or connect the following:
    NOTE
    Mount the sprocket so that the rise points toward the oil pump and so that the trochoid shape corresponds with that on the oil pump shaft.



    Oil pump. Torque to 18 ft. lbs. (25 Nm).
     
    Sprocket and chain
     



    Oil pan
     
    Engine oil
     

  2.  

M111 And M271 Engines


Click image to see an enlarged view

Fig. Exploded view of the oil pump mounting and related component-M111 engines

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Oil pan
     
    Oil pump drive gear
     
    Oil pump mounting bolts
     
    Oil pump
     

  4.  

To install:


NOTE
Be sure to replace any O-rings or seals between the oil pump and engine block.

  1. Install the oil pump and tighten the mounting bolts as follows:

    M6 bolts: 88 inch lbs. (9 Nm)
     
    M8 bolts: 15 ft. lbs. (21 Nm)
     

  2.  
  3. Install or connect the following:

    Oil pump drive gear. Torque the bolt to 24 ft. lbs. (32 Nm).
     
    Oil pan
     
    Engine oil
     

  4.  

M112 And M113 Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the lower oil pan. Refer to the oil pan procedure in this section.
  4.  
  5. Push the chain tensioner back and remove the pump drive chain.
  6.  
  7. Unbolt and remove the oil pump.
  8.  

To install:

  1. Fill the oil pump with clean engine oil and install it to the engine. Tighten the bolts to 15 ft. lbs. (20 Nm).
  2.  
  3. Install the pump drive chain.
  4.  
  5. Install the oil pan.

    Click image to see an enlarged view

    Fig. Exploded view of the oil pump mounting and related component-3.2L (112) and 4.3L (113) engines

  6.  

M272 Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the lower oil pan.
  4.  
  5. Remove the bolts from the oil suction tube
  6.  
  7. Push the chain tensioner back and remove the pump drive chain.
  8.  
  9. Unbolt and remove the oil pump together with the suction tube.
  10.  

To install:

  1. Fill the oil pump with clean engine oil and install it to the engine. First tighten the bolts to 44 inch lbs. (5 Nm), then to 15 ft. lbs. (20 Nm). Tighten the suction tube bolts to 80 inch lbs. (9 Nm).
  2.  
  3. Install the pump drive chain.
  4.  
  5. Install the oil pan.
  6.  

 
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