GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Intake Camshaft Installation - Left Side

Special Tools

J 45059 Angle Meter

For equivalent regional tools, refer to Special Tools.

  1. Clean the camshaft journals, camshaft and the camshaft caps with a clean, lint-free cloth.

    2. Object Number: 734798 Size: SH
  2. Apply a liberal amount of lubricant GM P/N 12345001 (Canadian P/N 992704) or equivalent to the camshaft journals (1).

    3. Object Number: 880633 Size: SH
  3. Apply a liberal amount of lubricant GM P/N 12345001 (Canadian P/N 992704) or equivalent to the camshaft lobes (1) and the camshaft journals (2).

    4. Object Number: 734801 Size: SH

    Note: Ensure each valve rocker arm is properly aligned to the valve tip, the valve lifter and the camshaft lobe. Inspect the alignment prior to and after the camshaft caps are tightened to specifications.

  4. Place the camshaft in the camshaft journals with the camshaft sprocket drive pins near the top of their rotation (1) and the camshaft lobes in a neutral position. The camshaft can be identified by a stamping near the rear journal. For example: L-INT is defined as left bank intake.

    5. Object Number: 721592 Size: SH
  5. Observe the markings on the camshaft bearing caps. Each camshaft bearing cap is marked in order to identify its location. The markings have the following meanings:
    6. • The arrow should point toward the front of the engine.
    • The number indicates the position from the front of the engine.
    • The "I" indicates the intake camshaft.
  6. Apply a liberal amount of lubricant GM P/N 12345001 (Canadian P/N 992704) or equivalent to the left intake camshaft bearing cap journals.

    7. Object Number: 880636 Size: SH
  7. Install the left intake camshaft bearing caps according to the identifications marks.
  8. Hand start all the left intake camshaft bearing cap bolts.

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


    Object Number: 734806 Size: SH

    Note: Ensure each valve rocker arm is properly aligned to the valve tip, the valve lifter and the camshaft lobe. Inspect the alignment prior to and after the camshaft caps are tightened to specifications.

  9. Install the left cylinder head intake camshaft bearing cap bolts.
    10. 9.1. Tighten the camshaft bearing cap bolts to 5 N·m (44 lb in).
    9.2. Tighten the camshaft bearing cap bolts an additional 30 degrees using the J 45059 meter .