Durango 2WD V8-4.7L VIN N (2001)
Hose/Line HVAC: Service and Repair
Rear Underbody Heater Lines Replacement
REMOVAL
1/2" Front Heater Tube Repair
1. Pinch hoses in engine compartment using spring clamp pliers.
2. Remove air box.
3. Remove passenger front tire.
4. Remove front inner fender well.
5. Disconnect the heater hose from underbody heater line using constant tension clamp pliers.
6. Drain coolant from underbody heater lines into an approved container.
7. Remove line brackets as necessary.
8. Mark cut location on tube on vehicle.
9. Cut tube on vehicle.
10. Size replacement tube, same as tube removed from vehicle.
11. Scuff end of both tubes using pad provided in special tool kit.
12. Select proper Lokring for 1/2" tube.
13. Put a drop of sealer from kit in the end of each tube, install Lokring and rotate to spread sealer evenly.
14. Select the proper jaws for the installation tool 1/2" from the kit.
15. Put installation tool over the Lokring with tubes installed (tube must be bottomed out in Lokring).
16. Compress Lokring using a wrench to draw the screw tight on the installation tool. Tighten the tool until the Lokring is bottomed out.
17. Back off the screw and remove the installation tool.
18. Reconnect the heater hose to the heater line.
19. Fill the cooling system.
20. Reinstall the front inner fender well.
21. Reinstall the front passenger side tire.
22. Reinstall the air box.
Complete Heater Line
1. Drain the cooling system.
2. Remove the air box.
3. Lift vehicle on hoist.
4. Remove passenger side tires.
5. Remove both front and rear inner fenders.
6. Disconnect the underhood heater lines using spring clamp release pliers.
7. Disconnect the rear heater lines at the rear heat core connections using spring clamp pliers.
8. Remove all body mount bolts on the passenger side and loosen the body mount bolts on the driver side.
9. Place a jack stand at the front and rear of the vehicle on the passenger side so that the stands will support the body.
10. Detach all underbody heater line brackets from the body that are accessible.
11. Lower the hoist until the body, that is being supported by the stands, is approximately 3-4 inches above the frame. This will allow access to the
underbody assembly.
12. Remove all remaining heater line brackets that were not accessible before the body lift.
13. Remove the complete heater line assembly from the vehicle.
1/2" Rear Heater Tube Repair
1. Remove and isolate the battery negative cable from the battery.
2. Drain the cooling system.
3. Lift vehicle on hoist.
4. Pinch heater hoses in engine compartment.
5. Remove rear passenger tire.
6. Remove rear inner fender well.
7. Disconnect the heater hose from the rear heater core using constant tension clamp pliers.
8. Drain any remaining coolant from the underbody heater lines and rear heater core.
9. Mark cut location on tube on vehicle.
10. Cut tube on vehicle.
11. Size replacement tube, same size as tube removed from vehicle.
12. Scuff end of both tubes using pad provide in special tool kit.
13. Select proper Lokring for tube.
14. Put a drop of sealer from kit on the end of each tube, install Lokring and rotate to spread sealer evenly.
15. Put installation tool over the Lokring with tubes installed (tubes must be bottomed out in Lokring)
16. Select the proper jaws for the installation tool from the kit.
17. Compress Lokring using a wrench to draw the screw tight on the installation tool. Tighten the tool until the Lokring is bottomed out.
18. Connect the heater hose to the rear heater core using constant tension clamp pliers.
19. Install the rear inner fender well.
20. Install the passenger tire.
21. Remove the hose clamp from the heater hoses in the engine compartment.
