Tools Required

J 36660-A Torque Angle Meter

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



2. Apply a liberal amount of lubricant GM P/N US 12345001 or equivalent to the camshaft journals (1).



3. Apply a liberal amount of lubricant GM P/N US 12345001 or equivalent to the camshaft lobes (1) and the camshaft journals (2).




Important: 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. 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:

•	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 US 12345001 or equivalent to the left exhaust camshaft bearing cap journals.



7. Install the left exhaust camshaft bearing caps according to the identifications marks.
8. Hand start all the left exhaust camshaft bearing cap bolts.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: 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.

9.1.	First Pass

Tighten
Tighten the camshaft bearing cap bolts to 5 N·m (44 lb in).

9.2.	Final Pass

Tighten
Tighten the camshaft bearing cap bolts an additional 30 degrees using the J 36660-A .