GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Exhaust 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: 734792 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: 880628 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: 734794 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-EXH is defined as left bank exhaust.

    5. Object Number: 721578 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 "E" indicates the exhaust camshaft.
  6. Apply a liberal amount of lubricant GM P/N 12345001 (Canadian P/N 992704) or equivalent to the left exhaust camshaft bearing cap journals.

    7. Object Number: 880630 Size: SH
  7. Install the left exhaust camshaft bearing caps according to the identifications marks.
  8. Hand start all the left exhaust camshaft bearing cap bolts.

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


    Object Number: 734797 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 exhaust 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 .