Removal Procedure
- Disconnect the negative battery cable.
- Raise the vehicle. Suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Remove the front splash shield.
- Drain the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
- Close the radiator drain cock.
- Install the front splash shield.
- Lower the vehicle.
- Remove the supercharger. Refer to Supercharger Replacement .
- Remove the thermostat housing .Refer to Engine Coolant Thermostat Replacement .
- Remove the EGR tube at the intake manifold.
- Disconnect the electrical connection at the temperature sensor.
- Remove the intake manifold.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Installation Procedure
Important: In order to install the manifold, complete the following steps:
• Use a suitable solvent in order to clean all oil from the cylinder
block, the cylinder heads, and the intake manifold sealing surface. • Apply a GM approved sealer to the ends of the intake manifold
seals. • Clean any adhesive compound from the intake manifold bolts and
the bolt holes. • Apply a GM P/N 12345493 threadlocker to the intake manifold bolts.
- Install the intake manifold.
- Install the intake manifold bolts.
- Install the electrical connector at the temperature sensor.
- Install the EGR tube to the intake manifold.
- Install the thermostat housing.
- Install the supercharger. Refer to Supercharger Replacement .
- Refill the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
- Connect the negative battery cable.
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.
Tighten
Tighten the intake manifold bolts in sequence to 15 N·m
(11 lb ft).
