GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Valve Lifter Oil Manifold Cleaning and Inspection

    Object Number: 1536553 Size: SH

    Note: 

       • Do not allow dirt or debris to enter the oil passages of the manifold. Plug, as required.
       • Do not disassemble the electrical components from the manifold.
       • Do not submerge the electrical components in cleaning solvent.
       • Do not use the manifold exterior gasket again. Remove the exterior gasket and install a NEW service gasket during assembly.

  1. Do not lift the manifold assembly by the electrical lead frame.

    2. Object Number: 1402008 Size: SH
  2. Remove the oil pressure sensor (706) and washer (707).
  3. Remove the oil screen (452) with O-ring (454).

    4. Warning: Refer to Safety Glasses Warning in the Preface section.

  4. Clean the manifold with compressed air.

    5. Object Number: 1402153 Size: SH
  5. Inspect for loose electrical solenoids (1-4) or loose or missing bolts.
  6. Inspect for damage to the electrical lead frame (5).
  7. Inspect for a damaged electrical connector, for bent or corroded pins.

    8. Object Number: 1402154 Size: SH
  8. Inspect for damaged interior sealing gaskets (1-8). If the interior sealing gaskets are damaged, the manifold must be replaced as an assembly.
  9. Inspect for a damaged exterior sealing gasket (9) or scored gasket surfaces.
  10. Inspect for debris or restrictions within the oil passages of the manifold.