For 1990-2009 cars

### Tools Required

J 38185 Hose Clamp Pliers

### Removal Procedure

1. Drain the engine cooling system. Refer to Cooling System Draining and Filling .
2. Using the J 38185 , reposition the heater hose outlet clamp from the heater pipe inlet.
3. Remove the heater hose outlet from the heater pipe inlet.
4. Remove the exhaust heat sheild. Refer to Exhaust Manifold Heat Shield Replacement .
5. Remove the heater inlet pipe bolt.
6. Remove the heater inlet pipe.

### Installation Procedure

1. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the heater outlet hose fitting threads.

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.

2. Install the heater outlet hose fitting.

Tighten
Tighten the heater outlet hose fitting to 45 N·m (33 lb ft).

3. Install the heater hose outlet to the heater pipe inlet.
4. Using the J 38185 , reposition the heater hose outlet clamp to the heater pipe inlet.
5. Install the exhaust heat sheild. Refer to Exhaust Manifold Heat Shield Replacement .
6. Fill the engine cooling system. Refer to Cooling System Draining and Filling .