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 shield. 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.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the heater outlet hose fitting. 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 shield. Refer to Exhaust Manifold Heat Shield Replacement.
6. Fill the engine cooling system. Refer to Cooling System Draining and Filling.