Heater Inlet Pipe Replacement LY7

1. Partially drain the cooling system. Refer to Cooling System Draining and Filling.
2. Remove the heater pipe inlet hose (1) from the heater inlet pipe.



3. Remove the heater inlet pipe housing bolts (1).
4. Remove the housing.
5. Remove the heater inlet pipe housing seal. Discard seal.

1. Install a NEW heater inlet pipe housing seal.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the heater inlet pipe housing bolts (1) and tighten to 10 N·m (89 lb in).



3. Install the heater inlet hose (1) to the heater inlet pipe.
4. Refill the cooling system. Refer to Cooling System Draining and Filling.

Heater Inlet Pipe Replacement LNJ

1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.
2. Drain the cooling system. Refer to Cooling System Draining and Filling.



3. Release and slide the heater core inlet hose clamp away from the heater inlet pipe connection.
4. Disconnect the heater core inlet hose from the heater inlet pipe.



5. Remove the heater inlet pipe nut (2).
6. Remove the heater inlet pipe (1).
7. Remove the seal (3) from the heater inlet pipe (1).

1. Install a new seal (3) to the heater inlet pipe (1).
2. Apply engine coolant to the heater inlet pipe seal (3).



3. Install the heater outlet pipe (1).

Caution: Refer to Fastener Caution in the Preface section.

4. Install the heater inlet pipe nut (2) and tighten to 25 N·m (18 lb ft).



5. Connect the heater core inlet hose to the heater inlet pipe.
6. Position the heater core inlet hose clamp over the heater inlet pipe connection.
7. Fill the cooling system. Refer to Cooling System Draining and Filling.
8. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.