BMW Cars 1999-06

Intake Manifold 3

Print

Removal & Installation



M62 Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Fuel system pressure
     
    Negative battery cable
     
    Center cover from the cylinder head cover
     
    Hose clamps on the idle speed control and the throttle valve assembly
     
    Plug on the mass air flow sensor
     
    Upper section of the air cleaner assembly along with the MAF sensor
     
    Right-hand cover from the cylinder head cover
     
    Plug for the oil level switch
     
    Connectors for the ignition coils
     
    Both KS, for cylinders 1 and 2 along with 3 and 4, and the pulse sensor
     
    Intake Air Temperature (IAT) sensor, Throttle Valve (TVS) sensor and the Idle Speed Control (ISC) valve
     
    Diagnostic connector from the mounting bracket and disconnect the engine wiring connector
     
    Ignition coil ground wire, located near the rear engine lifting eye, then the temperature sensor (black) for the temperature gauge, and the temperature sensor (white) for the Digital Motor Electronics (DME)
     
    4 bolts for the intake manifold cover, and remove the holder
     
    Throttle cable
     
    Left-hand cover from the cylinder head cover
     
    Ignition coil electrical connectors
     
    Both KS and the camshaft reference sender
     
    Coolant expansion tank plug and overflow hose, then remove the 2 mounting bolts, and move the tank aside
     
    Oil pressure switch electrical connector and remove the wiring
     
    Fasteners for the wiring ducts on the cylinder heads
     
    Vacuum hoses on the radiator, and loosen the hose clamp. Pull the vacuum hose off of the brake booster.
     
    Tank vapor venting hose from the throttle valve assembly
     
    Fuel feed and return lines
     
    Hose off of the end cover on the back of the manifold
     
    Mounting bolts, and remove the end cover together with the pressure regulating valve straight back to prevent damaging the vent pipe
     
    Intake manifold
     

  4.  

To install:

  1. Installation is the reverse of the removal procedure, while using the following torque values:

    6mm fasteners: 88 inch lbs. (10 Nm)
     
    7mm fasteners: 11 ft. lbs. (15 Nm)
     
    8mm fasteners: 16 ft. lbs. (22 Nm)

    Click image to see an enlarged view

    Fig. Diagnosis connector (1) and engine connector (2) locations on M62 engines

     

  2.  

M73 5.4L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Fuel system pressure
     
    Negative battery cable
     
    Vacuum hoses for the pressure regulators. Lift out the injection pipes with the injectors attached.
     
    Distributor caps and the throttle valve necks on the manifolds
     
    Spark plug wires and the ignition lead pipes
     
    Crankcase breather hose and loosen the manifold support nuts
     
    Nose guard
     
    Intake manifold
     

  4.  

To install:

  1. Installation is the reverse of the removal procedure, while using the following torque values:

    6mm fasteners: 88 inch lbs. (10 Nm)
     
    7mm fasteners: 11 ft. lbs. (15 Nm)
     
    8mm fasteners: 16 ft. lbs. (22 Nm)
     

  2.  

N52 Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Do not detach fuel line.



    Negative battery cable
     
    Tension strut
     
    Intake filter housing and mass air flow sensor
     
    Engine covers
     
    Vent hose and cable holder
     
    Electrical connectors and engine wiring harness, set aside and secure.
     
    Oil pressure switch plug connector
     



    Fuel rail, set aside and secure

    Click image to see an enlarged view

    Fig. Intake manifold fastener locations (1, 3) and fuel rail (2) on N52 engines

     
    Intake manifold fasteners
     
    Tank vent line behind throttle valve assembly
     
    Intake manifold
     

  4.  

To install:

  1. Replace all seals and gaskets.
  2.  
  3. Installation is the reverse of the removal procedure, while using the following torque values:

    7mm fasteners: 11 ft. lbs. (15 Nm)
     

  4.  

N62 Engines
  1. Remove or disconnect the following:

    Negative battery cable
     
    Engine covers
     
    Intake hose
     
    Injection pipe
     
    Differential pressure sensor and servomotor connectors
     
    Vent hose and cable holder
     
    Intake manifold fasteners and the intake manifold
     

  2.  

To install:

  1. Installation is the reverse of the removal procedure, while using the following torque values:

    6mm fasteners: 88 inch lbs. (10 Nm)
     
    7mm fasteners: 11 ft. lbs. (15 Nm)
     
    8mm fasteners: 16 ft. lbs. (22 Nm)
     

  2.  

S54 Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    On SMG transmissions, unplug the hydraulic pump relay from the electronics box. Disconnect the line between the expansion tank and hydraulic unit
     
    Microfilter assembly
     
    Hoses and positive cable lead from the intake manifold
     
    Oil dipstick guide tube from the manifold
     
    Manifold support fasteners
     
    Clamps from the throttle assemblies
     
    Intake manifold
     

  4.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  

S62 Engines
  1. Remove or disconnect the following:
    NOTE
    Note that the funnels for cylinders 1 and 5 are different from the others; mark them and set aside.



    Negative battery cable
     
    Intake filter housing and mass air flow sensor
     
    Left and right air ducts
     
    Engine cover
     
    Intake funnels
     

  2.  
  3. Slacken the bolts one turn starting from the outside and work towards the center. Start with the outer two rows, then do the inner rows near the center of the manifold. Once all are loosened one turn, remove all bolts following the same sequence. Disconnect any hoses and remove the manifold.
  4.  

To install:

  1. Installation is the reverse of the removal procedure. Tighten all manifold fasteners in the reverse procedure of removal, first to (5 Nm) then to 88 inch lbs. (10 Nm).
  2.  

 
label.common.footer.alt.autozoneLogo