Important: Whenever a new camshaft is installed, do the following procedures:
| • | Change the engine oil filter. |
| • | Add GM Engine Oil Supplement GM P/N 1052367 (Canadian P/N 992869)
or the equivalent to the engine oil. |
- 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 992869)
or equivalent to the following components:
| • | The engine camshaft lobes |
| • | The camshaft bearing journals |
- Install three 5/16-18 x 4.0 inch bolts into
the engine camshaft front bolt holes.
Notice: All camshaft journals are the same diameter, so care must be used in
removing or installing the camshaft to avoid damage to the camshaft bearings.
- Use the bolts as a handle in order to install the engine camshaft.
- Remove the 3 bolts from the front of the engine camshaft.
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.
- If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489)
or equivalent to the threads of the camshaft retainer bolts.
- Install the camshaft retainer and bolts.
Tighten
Tighten the camshaft retainer bolts to 12 N·m (106 lb in).
- Install the balance shaft drive gear. Refer to
Balance Shaft Installation
for alignment of the balance shaft drive gear
and the driven gear.
- Install the valve lifters. Refer to
Valve Lifter Replacement
.
- Install the timing chain and camshaft sprocket. Refer to
Timing Chain and Sprocket Replacement
.
