Mercedes-Benz Truck 2000-05

Camshaft, Bearings & Lifters

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Inspection



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the camshaft from the engine.
  4.  
  5. Check the camshaft bearing journals for damage and binding.
  6.  
  7. If the journals are binding, check the cylinder head for damage.
  8.  
  9. Check the cylinder head for clogged oil holes.
  10.  
  11. Check the camshaft surface for abnormal wear and damage. Replace the camshaft, as required.
  12.  
  13. Measure the camshaft lobe surface and replace the camshaft if not within specification.
  14.  
  15. Measure the camshaft journal diameter and replace the camshaft if not within specification.
  16.  
  17. Measure the camshaft run out and replace the camshaft if not within specification.
  18.  

Removal & Installation



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

    Negative battery cable
     
    Cylinder head cover
     

  4.  
  5. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).
  6.  


WARNING
The engine must not be rotated backward.



Generator
 
Timing chain tensioner
 

  1. Cable tie the timing chain to the camshaft sprocket.

    Camshaft Position (CMP) sensor
     

  2.  
  3. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00.

    Camshaft gears
     
    Camshaft bearing bridge
     
    Camshaft from the cylinder head
     

  4.  


    Click image to see an enlarged view

    Fig. Exploded view of the camshaft removal and related components-3.2L and 3.L engine shown; 4.3L and 5.0L engine similar


To install:


NOTE
Be sure to install the correct camshaft for the corresponding cylinder head.

  1. Apply clean engine oil to the camshaft contact surfaces.
  2.  
  3. Install or connect the following:

    Camshaft
     
    Camshaft bearing bridge
     

  4.  


NOTE
The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.

  1. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.

    Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
     

  2.  
  3. Remove the camshaft locking tools and the cable ties from the timing chain.

    CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)
     
    Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)
     
    Cylinder head cover
     
    Negative battery cable
     

  4.  
  5. Read fault memory, encode the radio and normalize the power windows.
  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
     
    Cylinder head cover
     

  4.  
  5. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).
    WARNING
    The engine must not be rotated backwards.



    Generator
     
    Timing chain tensioner
     

  6.  
  7. Cable tie the timing chain to the camshaft sprocket.

    Camshaft Position (CMP) sensor
     

  8.  
  9. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00.

    Camshaft gears
     
    Camshaft bearing bridge
     
    Camshaft from the cylinder head

    Click image to see an enlarged view

    Fig. Exploded view of the camshaft removal and related components-3.2L engine shown

     

  10.  

To install:


NOTE
Be sure to install the correct camshaft for the corresponding cylinder head.

  1. Apply clean engine oil to the camshaft contact surfaces.
  2.  
  3. Install or connect the following:
    NOTE
    The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.



    Camshaft
     
    Camshaft bearing bridge
     



    Click image to see an enlarged view

    Fig. Be sure the camshafts are at their basic positions before installing the cam sprockets-3.2L engine shown

  4.  
  5. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.

    Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
     

  6.  
  7. Remove the camshaft locking tools and the cable ties from the timing chain.

    CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)
     
    Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)
     
    Cylinder head cover
     
    Negative battery cable
     

  8.  
  9. Read fault memory, encode the radio and normalize the power windows.
  10.  

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

    Negative battery cable
     
    Cylinder head cover
     

  4.  
  5. Rotate the engine clockwise to position the crankshaft 40 degrees After Top Dead Center (ATDC).
    WARNING
    The engine must not be rotated backward.



    Generator
     
    Timing chain tensioner
     

  6.  
  7. Cable tie the timing chain to the camshaft sprocket.

    Camshaft Position (CMP) sensor
     

  8.  
  9. Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00.

    Camshaft gears
     
    Camshaft bearing bridge
     
    Camshaft from the cylinder head

    Click image to see an enlarged view

    Fig. Exploded view of the camshaft removal and related components-M112 engine shown; M113 engine similar

     

  10.  

To install:


NOTE
Be sure to install the correct camshaft for the corresponding cylinder head.

  1. Apply clean engine oil to the camshaft contact surfaces.
  2.  
  3. Install or connect the following:
    NOTE
    The camshafts can be rotated 40 degrees ATDC of the No. 1 cylinder without the valves touching the pistons.



    Camshaft
     
    Camshaft bearing bridge
     

  4.  
  5. Position the camshaft so that the groove points centered towards the contact surface of the cylinder head cover, then attach the camshaft fixing plate. Repeat this step for the other camshaft.

    Camshaft sprockets and tighten the attaching bolt to 37 ft. lbs. (50 Nm) plus 90-100 degrees
     

  6.  
  7. Remove the camshaft locking tools and the cable ties from the timing chain.

    CMP sensor and tighten the mounting bolt to 70 inch lbs. (8 Nm)
     
    Timing chain tensioner with a new gasket and tighten to 59 ft. lbs. (80 Nm)
     
    Cylinder head cover
     
    Negative battery cable
     

  8.  
  9. Read fault memory, encode the radio and normalize the power windows.
  10.  

 
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