Mercedes-Benz Truck 2000-05

Intake Manifold

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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
     
    Cylinder head cover
     
    Mass Air Flow (MAF) sensor with the intake pipe
     

  4.  
  5. Properly relieve the fuel system pressure.

    Fuel rail with the injectors
     
    Vacuum lines from the intake manifold
     
    All electrical connections to the intake manifold
     
    Exhaust Gas Recirculation (EGR) valve
     
    Combination valve
     
    Intake manifold mounting bolts
     
    Intake manifold and gaskets
     

  6.  
  7. Place clean shop rags into the intake passages to prevent dirt from entering. Clean the gasket mating surfaces.
  8.  


    Click image to see an enlarged view

    Fig. Exploded view of the intake manifold and related components-3.2L and 3.7L engines shown; 4.3L and 5.0L similar


To install:

  1. Install the new gaskets and verify the secondary air injection passage opening in the gasket.
  2.  
  3. Remove the shop rags from the intake passages.
  4.  
  5. Install or connect the following:

    Intake manifold to the engine and tighten the mounting bolts to 15 ft. lbs. (20 Nm)
     
    Combination valve and tighten the bolts to 15 ft. lbs. (20 Nm)
     
    EGR valve
     
    Electrical connections to the intake manifold
     
    Vacuum lines to the manifold
     
    Fuel rail with the injectors
     
    MAF sensor with the air intake pipe
     
    Cylinder head cover and tighten the bolts to 88 inch lbs. (10 Nm)
     
    Negative battery cable
     

  6.  
  7. Read fault memory, encode the radio and normalize the power windows.
  8.  
  9. Start the vehicle and check for leaks.
  10.  

  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
     
    Mass Air Flow (MAF) sensor with the intake pipe
     

  4.  
  5. Properly relieve the fuel system pressure.

    Fuel rail with the injectors
     
    Vacuum lines from the intake manifold
     
    All electrical connections to the intake manifold
     
    Exhaust Gas Recirculation (EGR) valve
     
    Combination valve
     
    Intake manifold mounting bolts
     
    Intake manifold and gaskets
     

  6.  
  7. Place clean shop rags into the intake passages to prevent dirt from entering. Clean the gasket mating surfaces.

    Click image to see an enlarged view

    Fig. Exploded view of the intake manifold and related components-3.2L engine shown

  8.  

To install:

  1. Install the new gaskets and verify the secondary air injection passage opening in the gasket.
  2.  
  3. Remove the shop rags from the intake passages.
  4.  
  5. Install or connect the following:

    Intake manifold to the engine and tighten the mounting bolts to 15 ft. lbs. (20 Nm)
     
    Combination valve and tighten the bolts to 15 ft. lbs. (20 Nm)
     
    EGR valve
     
    Electrical connections to the intake manifold
     
    Vacuum lines to the manifold
     
    Fuel rail with the injectors
     
    MAF sensor with the air intake pipe
     
    Cylinder head cover and tighten the bolts to 88 inch lbs. (10 Nm)
     
    Negative battery cable
     

  6.  
  7. Read fault memory, encode the radio and normalize the power windows.
  8.  
  9. Start the vehicle and check for leaks.
  10.  

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

    Negative battery cable
     
    Cylinder head cover
     
    Mass Air Flow (MAF) sensor with the intake pipe
     

  4.  
  5. Properly relieve the fuel system pressure.

    Fuel rail with the injectors
     
    Vacuum lines from the intake manifold
     
    All electrical connections to the intake manifold
     
    Exhaust Gas Recirculation (EGR) valve
     
    Combination valve
     
    Intake manifold mounting bolts
     
    Intake manifold and gaskets
     

  6.  
  7. Place clean shop rags into the intake passages to prevent dirt from entering. Clean the gasket mating surfaces.

    Click image to see an enlarged view

    Fig. Exploded view of the intake manifold and related components-M112 engines shown; M113 similar

  8.  

To install:

  1. Install the new gaskets and verify the secondary air injection passage opening in the gasket.
  2.  
  3. Remove the shop rags from the intake passages.
  4.  
  5. Install or connect the following:

    Intake manifold to the engine and tighten the mounting bolts to 15 ft. lbs. (20 Nm)
     
    Combination valve and tighten the bolts to 15 ft. lbs. (20 Nm)
     
    EGR valve
     
    Electrical connections to the intake manifold
     
    Vacuum lines to the manifold
     
    Fuel rail with the injectors
     
    MAF sensor with the air intake pipe
     
    Cylinder head cover and tighten the bolts to 88 inch lbs. (10 Nm)
     
    Negative battery cable
     

  6.  
  7. Read fault memory, encode the radio and normalize the power windows.
  8.  
  9. Start the vehicle and check for leaks.
  10.  

 
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