Important: Use the following guidelines when servicing the cooling system or draining
it for service procedures:
• Add two coolant pellets, GM P/N 3634621 or equivalent, when the
cooling system is serviced or drain for service procedures. • The pellets must be added to the radiator or the pressurized water
reservoir. • Crush the pellets prior to installation. • Do not place the pellets into a non-pressurized coolant recovery
reservoir. On these systems, the pellets must be added to the radiator. • The sealant pellets may leave a film on the sides of the pressurized
and non-pressurized water recovery reservoirs. This film is normal.
- Install the water pump cover to the coolant pump assembly.
- Install the water pump bolts. Finger tighten the bolts.
- Install the cover to the block bolts. Finger tighten the bolts.
- Install the pump to chain housing nuts. Finger tighten the nuts.
- Use the following sequence to tighten the fasteners:
| Important: When the pump assembly to the housing nuts are tight there should be a gap between the seal and both the housing and the pump. |
| 5.1. | Install the pump assembly to the chain housing nuts. |
Tighten
Tighten the nuts to 26 N·m (19 lb ft).
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.
| 5.2. | Install the pump cover to the pump assembly. |
Tighten
Tighten the bolts to 14 N·m (124 lb in).
| 5.3. | Install the cover to the block, bottom bolt first. |
Tighten
Tighten the bolts to 26 N·m (19 lb ft).
