Sentra 1997

Exhaust Manifold

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Removal & Installation



1.6L, 1.8L & 2.0L Engines
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Engine undercovers
     
    Air cleaner or collector assembly
     
    Heat shields from the manifold and front exhaust pipe
     
    Front exhaust pipe from the exhaust manifold
     
    Temperature sensors, Oxygen (O 2 ) sensors and air induction pipes from the manifold
     
    Manifold support brackets
     
    Exhaust manifold attaching nuts and the manifold from the block. Discard the exhaust manifold gaskets.
     

  4.  
  5. Clean the gasket surfaces and check the manifold for cracks and warpage.

    Click image to see an enlarged view

    Fig. Exhaust manifold bolt tightening sequence-1.8L engine-2002-2006

  6.  

To install:

  1. Install the exhaust manifold with a new gasket.
  2.  
  3. On 1.6L and 1.8L engines, tighten the mounting nuts with washers in sequence to 19-21 ft. lbs. (26-29 Nm).
  4.  
  5. On 2.0L engines, torque the fasteners from the center outward in several stages to 27-35 ft. lbs. (37-48 Nm).
  6.  
  7. Install or connect the following:

    Temperature sensors, O 2 sensors and air induction pipes
     
    Manifold support brackets
     
    Exhaust pipe to the manifold using a new gasket. Torque the nuts to 21-25 ft. lbs. (28-33 Nm) for 1.6L and 1.8L engines, or 32-37 ft. lbs. (43-50 Nm) for 2.0L engine models.
     
    Heat shields
     
    Air cleaner or collector assembly
     
    Engine undercovers
     
    Negative battery cable
     

  8.  
  9. Start the engine and check for exhaust leaks.
  10.  

 
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