Note: Before starting, allow the engine to cool down completely.
Tools Needed:
- Socket wrench set
- Philips and flat-head screwdrivers
- Pliers
- Needle-nose pliers
- Coolant drain pan
- New heater core (OEM or aftermarket)
- Coolant (mopar antifreeze or equivalent)
- Rags or towels
Step 1: Disconnect the Battery
Disconnect the negative battery terminal to isolate the electrical system during the repair.
Step 2: Drain Coolant
Locate the drain plug on the radiator and place the coolant drain pan underneath. Open the drain plug to drain most of the coolant. Close the drain plug once the coolant has drained.
Step 3: Remove Dashboard Components
- Remove the screws or bolts securing the lower dash panel (underneath the steering wheel) and set it aside.
- Remove the glove box door by disengaging the hinge pin.
- Unscrew or unbolt the glove box compartment and set it aside.
Step 4: Remove Heater Housing
- Locate and disconnect any electrical connectors or cables attached to the heater housing.
- Remove the mounting screws or bolts that hold the heater housing in place.
- Carefully remove the heater housing from the vehicle, being mindful of any remaining cables or hoses.
Step 5: Remove Heater Core
- Inside the heater housing, locate the heater core. It's usually a rectangular metal box with two coolant lines attached.
- Disconnect the heater hoses from the heater core by loosening the hose clamps.
- Remove any brackets or retaining clips holding the heater core in place.
- Gently pull out the old heater core from the housing.
Step 6: Install New Heater Core
- Place the new heater core into the housing, ensuring it's properly aligned.
- Reconnect the heater hoses and secure them tightly with hose clamps.
- Reinstall any brackets or clips that hold the heater core in place.
Step 7: Reinstall Heater Housing
- Carefully reinstall the heater housing into the vehicle, aligning it properly.
- Secure the housing with the previously removed mounting screws or bolts.
- Reconnect any electrical connectors or cables.
Step 8: Refill Coolant
- Open the radiator fill cap and slowly add coolant to the system until it reaches the recommended level (check the owner's manual).
- Close the radiator fill cap and start the engine.
- Let the engine run for a few minutes to circulate the coolant.
- Check for any leaks around the heater core connections and hoses.
Step 9: Reinstall Dashboard Components
- Reinstall the glove box compartment and secure it.
- Reinstall the glove box door by engaging the hinge pin.
- Reinstall the lower dash panel and secure it with the previously removed screws or bolts.
Step 10: Reconnect Battery
Reconnect the negative battery terminal to restore electrical power to the vehicle.
Test the heater core by turning on the vehicle's heating system and adjusting the temperature to the highest setting. If warm air is coming through the vents, the heater core has been successfully replaced.
Remember, if you're not comfortable performing this repair on your own, it's best to take your vehicle to a qualified mechanic or auto repair shop. They have the necessary tools, expertise, and experience to ensure a proper and safe repair.
