Auxiliary Heater and Air Conditioning Pipe Repair With A/C

Tools Required

J 41425 A/C Line Repair Kit

Use the J 41425 for all A/C lines that require repair because of the following conditions:

Refer to Straight Line Repair below.

When the A/C line has visible damage in a bend area, section the A/C line. Refer to A/C Line Sectioning Repair. Sectioning the line obtains the original line shape in order to avoid vibrations or rub through.

Tools Required

J 41425 A/C Line Repair Kit

1. Recover the A/C system. Refer to Refrigerant Recovery and Recharging .
2. Locate the repair area.
3. Use a tubing cutter in order to cut the damaged line for the repair.
4. Use the clean pad provided in the J 41425 in order to clean any burrs or grease at least 19 mm (0.75 in) from the A/C line.
5. Use the LOK prep sealant in order to prepare the A/C line for the repair.
6. Apply one drop of the sealing compound, J 41425-3, to the outside of each line end.
7. Insert the line ends into the LOK fitting.
8. Rotate the LOK fitting one complete turn in order to evenly distribute the sealing compound around the lines.
9. Install the J 41425-1 over the connector and the tubes.
10. Ensure that the connector ends are in position in the counter bores of the jaws.
11. Turn the forcing screw while holding the tool body with a 3/8 breaker bar until both of the connector collars bottom on the center shoulder of the LOK fitting.
12. Loosen the forcing screw.
13. Remove the tool from the repaired line.
14. Verify the LOK fitting for proper installation.
15. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
16. Inspect the system for leaks.

If the A/C line has a leak on a bend, section the line for the repair.

Tools Required

J 41425 A/C Line Repair Kit

1. Recover the A/C system. Refer to Refrigerant Recovery and Recharging .
2. Obtain a new A/C line for sectioning.

Important: Sectioning the A/C lines requires a minimum length to the straight part of the line on both sides of the splice. Refer to the Minimum Tube Length Requirements table.

3. Scribe a mark for the cut on the damaged A/C line.
4. Scribe a mark on the new line for sectioning.
5. Use a tubing cutter in order to cut both A/C lines.
6. Use the clean pad provided in the J 41425 in order to clean any burrs or grease at least 19 mm (0.75 in) from the A/C line.
7. Use the LOK prep sealant in order to prepare the A/C line for the repair.
8. Apply one drop of the sealing compound ,J 41425-3, to the outside of each line end.
9. Insert the line ends into the LOK fitting.
10. Rotate the LOK fitting one complete turn in order to evenly distribute the sealing compound around the lines.
11. Install the J 41425-1 over the connector and the tubes.
12. Ensure that the connector ends are in position in the counter bores of the jaws.
13. Turn the forcing screw while holding the tool body with a 3/8 breaker bar until both of the connector collars bottom on the center shoulder of the LOK fitting.
14. Loosen the forcing screw.
15. Remove the tool from the repaired line.
16. Verify the LOK fitting for proper installation.
17. Repeat the necessary steps in order to repair the other end of the A/C line.
18. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
19. Inspect the system for leaks.

Auxiliary Heater and Air Conditioning Pipe Repair Without A/C

You cannot service the auxiliary heater pipes as a complete unit. You can only section repair the pipes. Follow the steps provided in the auxiliary heater pipes procedure.

1. Raise and Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Drain the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.



3. Disconnect the front left side, and the rear heater pipe connections.



4. Remove the heater pipe retainers from the vehicle body.
5. Using a tubing cutter, or an equivalent tool, cut the heater pipes into sections in order to remove the pipes from the vehicle.

1. Connect the first section of the heater pipes to the auxiliary heater.
2. Connect the second section of the heater pipes.

Join the connectors to the first section heater pipes.

3. Connect the third section of the heater pipes.

Join the connectors to the second section heater pipes.




4. Connect the front left side and the rear heater pipe connections.
5. Install the heater pipe retainers to the vehicle body.
6. Lower the vehicle.
7. Fill the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
8. Verify that there are no coolant leaks.