GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.9L 🢒 Valve Lifter Oil Manifold Replacement

Removal Procedure

    Note: The lifter oil manifold assembly (LOMA) connector must be disconnected from the lower intake manifold before removing the lower intake manifold.


    Object Number: 1792708 Size: SH
  1. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement.

    2. Note: Do not allow dirt or debris to enter the oil passages of the manifold. Plug as required.

  2. Remove the valve lifter oil manifold bolts (1).
  3. Remove the valve lifter oil manifold (2).
  4. Remove and discard the LOMA oil manifold filter (3).
  5. Remove and discard the valve lifter oil manifold gasket (4).

Installation Procedure

    Object Number: 1792708 Size: SH

    Note: 

       • All gasket surfaces should be free of oil or other foreign material during assembly.
       • Do not allow dirt or debris to enter the oil passages of the manifold. Plug as required.
       • Do not reuse the manifold gasket. Always install a NEW service gasket during assembly.
       • Do not reuse the LOMA oil manifold filter. Always install a NEW filter during assembly.

  1. Install a NEW oil manifold gasket (4).
  2. Install a NEW oil manifold filter (3) in the oil manifold (2).
  3. Install the oil manifold (2).

    4. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the oil manifold bolts (1).

    5. Tighten
    Tighten the manifold bolts to 25 N·m (18 lb ft).

    Note: The lifter oil manifold assembly (LOMA) connector must be disconnected from the lower intake manifold before installing the lower intake manifold.

  5. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement.