AutoZone 1999 Buick Park Avenue 3.8L FI OHV 6cyl | Repair Guides | Engine Mechanical | Engine Mechanical Components | Intake Manifold | AutoZone.com

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    1999 Buick Park Avenue 3.8L FI OHV 6cyl

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    Equinox 2005-2007, Torrent 2006-07

    Intake Manifold

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    Removal & Installation



    Lower Manifold
    1. Drain the cooling system.
    2.  
    3. Remove the upper intake manifold.
    4.  
    5. Remove the heater inlet pipe.
    6.  
    7. Disconnect the radiator inlet hose from the thermostat housing.
    8.  
    9. Remove the fuel rail assembly.
    10.  
    11. Remove the lower intake manifold bolts.
    12.  
    13. Remove the lower intake manifold from the engine.
    14.  
    15. Remove the rocker arms and push rods.
    16.  
    17. Remove the lower intake manifold gaskets.
    18.  

    To install:


    NOTE
    All gasket mating surfaces must remain free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) or equivalent to clean surfaces.


    NOTE
    Do not apply Room Temperature Vulcanizing (RTV) sealer to the engine block prior to the installation of the manifold gaskets. RTV sealer is not to be placed under the lower intake manifold gaskets.

    1. Install the lower intake manifold gaskets.
    2.  
    3. Install the rocker arms and push rods.
    4.  
    5. Install the lower intake manifold seals.

      Click image to see an enlarged view

      Fig. With the seals in place, apply a small drop 0.31-0.39 in. (8-10 mm) of RTV sealer as shown

    6.  
    7. With the seals in place, apply a small drop 0.31-0.39 in. (8-10 mm) of RTV sealer GM P/N 12346141 (Canadian P/N 10953433).
    8.  
    9. Install the lower intake manifold to the engine.
      NOTE
      Maximum gasket performance is achieved when using new fasteners, which contain a thread-locking patch. If the fasteners are not replaced, a thread locking chemical must be applied to the fastener threads. Failure to replace the fasteners or apply a thread-locking chemical MAY reduce gasket sealing capability.


      NOTE
      All lower intake manifold bolts need to be clean, free of foreign materials, and reused only if new bolts are unavailable. Use GM P/N 1234382 (Canadian P/N 10953489) or equivalent and apply to the old intake manifold bolt threads. Manufacturer recommends the center bolts be fully torqued before the diagonal bolts to assure proper torque distribution. Lower intake manifold bolts in locations (6) and (7) should be torqued to specification using a crow-s foot type tool.



      Click image to see an enlarged view

      Fig. Lower intake manifold torque sequence

    10.  
    11. Install the lower intake manifold bolts.

      Tighten the lower intake manifold bolts in sequence to 115 inch lbs. (13 Nm) on the first pass.
       
      Tighten the lower intake manifold bolts (1, 2, 3, 4) in sequence to 15 ft. lbs. (20 Nm) on the final pass.
       
      Tighten the lower intake manifold bolts (5, 6, 7, 8) in sequence to 18 ft. lbs. (25 Nm) on the final pass.
       

    12.  
    13. Install the fuel rail assembly.
    14.  
    15. Connect the radiator inlet hose to the thermostat housing.
    16.  
    17. Install the heater inlet pipe.
    18.  
    19. Install the upper intake manifold.
    20.  
    21. Fill the cooling system.
    22.  

     
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