73. Camshaft Installation - Left
Tools Required^ J 36660-A Torque/Angle Meter
^ J 39946 Crankshaft Rotation Socket
^ J 44212 Camshaft Holding Tool
1. Ensure the crankshaft is in the TDC position for the number one cylinder using the J 39946.
Important: Do not stroke/cycle the stationary hydraulic lash adjuster plunger without oil in the lower pressure chamber.
Important: Do not allow the stationary hydraulic lash adjuster to tip over (plunger down) after the oil fill.
2. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil GM P/N 12378006 or equivalent. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
3. Lubricate the SHLA bores of the cylinder head with clean engine oil GM P/N 12378006 or equivalent.
4. Install the SHLAs.
5. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the SHLA sphere.
6. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the roller (2), pivot pocket and valve slot areas (1) of the camshaft followers.
Important: The follower must be positioned squarely on the valve tip so that the full width of the roller will completely contact the camshaft lobe. If the followers are being reused you must put them back in their original location.
7. Place the camshaft followers in position on the valve tip and SHLA (1). The rounded head of the follower goes on the SHLA while the flat end goes on the valve tip.
8. Clean the camshaft journals and the camshaft carriers with a clean, lint-free cloth.
9. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the carriers (1).
10. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the camshaft lobes (1) and the camshaft journals (2).
11. Place the camshaft in the camshaft carriers with the camshaft sprocket drive pins near the top of their rotation and the camshaft lobes in a neutral position. The camshafts can be identified by a stamping near the rear journal. For example: L-EXH is defined as Left Bank Exhaust.
12. 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.
^ The I indicates the intake camshaft.
13. Apply a liberal amount of lubricant GM P/N 12345001 or equivalent to the camshaft bearing caps.
14. Install the camshaft bearing caps according to the identifications marks.
15. Hand start all the camshaft bearing cap bolts.
Notice: Refer to Fastener Notice in Service Precautions.
16. Install the left cylinder head camshaft bearing cap bolts.
16.1. First Pass
Tighten the camshaft bearing cap bolts to 5 Nm (44 lb in).
16.2. Final Pass
Tighten the camshaft bearing cap bolts an additional 30 degrees using the J 36660-A.
17. Align the camshafts.
18. Install the J 44212 to the left cylinder head camshafts.