Before you start:
* Safety First: Disconnect the negative battery terminal to prevent electrical shorts. Always wear safety glasses and gloves.
* Consult a Repair Manual: A factory service manual specific to your 2003 Chrysler Town & Country is invaluable. It will show you the exact location of the lines, the proper procedure for disconnecting and reconnecting them, torque specifications for fasteners, and potentially other crucial information. You can find these manuals online (e.g., eBay, Amazon) or at auto parts stores.
* Gather Tools: You'll likely need various wrenches (metric), pliers, possibly a tubing cutter or flaring tool (depending on the type of line repair needed), new heater lines (get the correct length and type!), coolant, and a funnel.
General Steps (This is a *general* outline, refer to your repair manual for specifics):
1. Locate the Leak: Pinpoint the exact location of the leak in the rear heater lines. This often involves visual inspection from under the vehicle and potentially from the inside (accessing the area near the rear heater core might require removing interior panels).
2. Drain the Coolant: Drain the vehicle's coolant system completely before disconnecting any lines. This prevents a mess and helps prevent air pockets in the system after the repair.
3. Access the Lines: This is often the most challenging part. You may need to remove parts of the undercarriage or interior trim to gain access to the lines. Your repair manual will guide you through this process.
4. Disconnect the Lines: Carefully disconnect the old heater lines. Take pictures or make notes before disconnecting anything to aid in reassembly. Be prepared for coolant spillage.
5. Install New Lines: Install the new heater lines, ensuring they're properly connected and routed. If you need to flare new lines, ensure you do so correctly to prevent leaks.
6. Reconnect and Refill: Reconnect all components, carefully refilling the coolant system according to your vehicle's specifications. Bleed the system to remove any air pockets. This is crucial for proper heater function.
7. Test: Run the engine and check for leaks. Test the rear heater to verify functionality.
Important Considerations:
* Line Type: Are they rubber hoses or metal lines? Repair methods differ. Rubber hoses are usually easier to replace. Metal lines might require flaring or specialized tools.
* Corrosion: Rust and corrosion can make disconnecting lines difficult. Use penetrating oil to help loosen connections.
* Complexity: This is not a simple repair and can be time-consuming. If you're not comfortable working on your vehicle, it's strongly recommended to take it to a qualified mechanic. Improper repair can lead to further damage, coolant leaks, and overheating.
This information is for guidance only. Always consult your vehicle's repair manual for the precise procedure and safety precautions. Attempting this repair without proper knowledge and tools can lead to damage or injury.
