Heater Pipes Replacement LY7

Heater Pipes Replacement LS4

Special Tools

J 38185 Spring Hose Clamp Pliers

1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
2. Drain the cooling system. Refer to Cooling System Draining and Filling.



3. Release and reposition the heater inlet and outlet hose clamps using the J 38185 .

Important: Cap or plug the cooling components to prevent system contamination.

4. Remove the heater hoses from heater pipes.

Notice: Do not apply excessive force on the heater core pipes during hose removal. Applying excessive force on the heater core pipes may damage the heater core pipes.




5. Remove the heater pipe assembly retaining bolts from the rear the of engine.



6. Remove the heater pipe assembly retaining bolt from the front of the engine.
7. Release and reposition the heater pipe hose clamps at the engine using the J 38185 .
8. Remove the heater pipe hoses from the engine.
9. Remove the heater pipe assembly from the vehicle.

1. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the heater pipe assembly at the engine and heater hoses.
2. Install the heater pipe assembly into position in the vehicle.
3. Install the heater pipe hoses to the engine.
4. Reposition and release the heater pipe hose clamps at the engine using the J 38185 .
5. Loosely install the heater pipe assembly retaining bolt to the front of the engine.

Notice: Refer to Fastener Notice in the Preface section.




6. Install the heater pipe assembly retaining bolts to the rear of the engine.

Tighten
Tighten all the heater pipe assembly bolts to 16 N·m (12 lb ft).




7. Connect heater hoses to the heater pipe assembly.
8. Install the heater hose clamps into position using the J 38185 .
9. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
10. Fill the cooling system. Refer to Cooling System Draining and Filling.