Installation Procedure

Important:  Whenever a new camshaft is installed, do the following procedures:

• Change the engine oil.
• Change the engine oil filter.
• Add GM Engine Oil Supplement GM P/N 1052367 (Canadian P/N 992367) or the equivalent to the engine oil.

1. Apply clean engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent, or engine oil supplement GM P/N 1052367 (Canadian P/N 992367) or equivalent to the following components:
   • The engine camshaft lobes
   • The camshaft bearing journals
   • The camshaft bearings
2. Install three 5/16-18 x 4.0 inch bolts into the engine camshaft front bolt holes.
3. Use the bolts as a handle in order to install the engine camshaft.
4. Remove the 3 bolts from the front of the engine camshaft.
   Fig 1: Installing Engine Camshaft

   Courtesy of GENERAL MOTORS CORP.
5. If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the camshaft retainer bolts.
   CAUTION: 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.
6. Install the camshaft retainer and bolts.

   Tighten 

   Tighten the camshaft retainer bolts to 12 N.m (106 lb in).

   Fig 2: Installing Camshaft Retainer & Bolts

   Courtesy of GENERAL MOTORS CORP.
7. Install the balance shaft drive gear. Refer to Balance Shaft Replacement  for alignment of the balance shaft drive gear and the driven gear.
8. Install the timing chain and camshaft sprocket. Refer to Timing Chain and Sprockets Replacement .
9. Install the valve lifters. Refer to Valve Lifter Replacement .
10. Install the A/C condenser. Refer to CONDENSER REPLACEMENT .
11. Install the engine cooling fan. Refer to FAN CLUTCH REPLACEMENT .
12. Install the radiator. Refer to RADIATOR REPLACEMENT .
13. Fill the engine cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
14. Recharge the air conditioning system. Refer to REFRIGERANT RECOVERY AND RECHARGING .
15. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim .
16. Connect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .