Heater Pipes Replacement LG4 Inlet

1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
2. Remove the inlet hose clamp to the engine pipe.



3. Remove the hose clamps from the heater core.
4. Remove the inlet pipe mounting bolts, washers and nuts.
5. Remove the inlet pipe clamp on the frame.



6. Remove the inlet pipe.

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.

1. Push the pipe into the heater inlet hose connector (1) until the retainer locking tabs lock. (2,3 ) Pull back on the hose to check for proper engagement.

Tighten
Quick Connect Heater Inlet Connector to 35 N·m (26 lb ft).

2. Install the inlet pipe.



3. Install the pipe clamps on the frame.
4. Install the inlet pipe mounting bolts, washers and nuts.

Tighten
Tighten the inlet pipe nuts to 23 N·m (17 lb ft).

5. Install the inlet hose clamp from the heater core.
6. Install the inlet hose clamp to the engine pipe.
7. Fill with engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
8. Inspect the system for leaks.

Heater Pipes Replacement LG4 Outlet

1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
2. Remove the hose clamp from the heater core.
3. Remove the hose clamp from the radiator hose.
4. Remove the mounting bolt.



5. Remove the pipe clamp on the frame.



6. Remove the outlet pipe.

1. Install the outlet pipe.
2. Install the clamp on the frame.



3. Install the mounting bolt.

Tighten
Tighten the bolt to 23 N·m (17 lb ft).

4. Install the hose clamp from the radiator hose.
5. Install the hose clamp from the heater core.
6. Fill with engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
7. Inspect the system for leaks.