For 1990-2009 cars

#### Tools Required

J 21882 Intake Manifold Coolant Pipe Installer

1. Apply sealant GM P/N 12345493 to the end of a new intake manifold coolant pipe.
2. Install the intake manifold coolant pipe using the J 21882 .
3. Lightly tap the intake manifold coolant pipe into the bore of the lower intake manifold.
4. Apply sealer GM P/N 1052080 to the threads of the engine coolant temperature sensor.
5. Install the engine coolant temperature sensor.

Tighten
Tighten the engine coolant temperature sensor to 23 N·m (17 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.

6. Apply sealer GM P/N 1052080 to the threads of the heater inlet pipe nipple.
7. Install the heater inlet pipe nipple.

Tighten
Tighten the heater inlet pipe nipple to 30 N·m (22 lb ft).

8. Install the thermostat.
9. Install the coolant outlet.
10. Install the coolant outlet assembly bolts.

Tighten
Tighten the coolant outlet assembly bolts to 25 N·m (18 lb ft).