However, if you're determined to do it yourself, here's a general outline. This is not a complete step-by-step guide, as variations exist depending on the specific trim level and model year. Always consult a repair manual specific to your 1993 Ford Ranger for detailed instructions and diagrams.
Tools and Materials You'll Likely Need:
* Repair manual: Absolutely essential for specific instructions and torque specifications.
* Socket set (metric): A wide range of sizes will be necessary.
* Wrenches (metric): Both open-end and combination wrenches.
* Screwdrivers (Phillips and flathead): Various sizes.
* Pliers: Needle-nose, slip-joint.
* Drain pan: To catch coolant.
* New heater core: Ensure you get the correct one for your vehicle.
* Coolant: The correct type for your Ranger.
* New hoses (if needed): The heater hoses are often brittle and may need replacing.
* Shop rags or towels: Many, many of them.
* Patience: This is a time-consuming job.
General Steps (Highly Simplified and May Vary):
1. Disconnect the battery: Safety first!
2. Drain the cooling system: Locate the drain petcock on the engine block and drain the coolant into a suitable container.
3. Remove the dashboard: This is the most involved part. You'll likely need to remove:
* Steering column (partially or completely, depending on access).
* Glove box.
* Radio and other components.
* Various trim panels and screws. This often requires careful observation and perhaps a little gentle persuasion to remove the dashboard components.
4. Access the heater core: Once the dash is partially or fully removed, you should be able to locate the heater core behind the dash. It's usually located within the HVAC housing.
5. Disconnect the heater hoses: Carefully disconnect the heater hoses from the heater core. Have rags ready to absorb any spilled coolant.
6. Remove the heater core: This can be tricky and may involve removing some brackets or other components that hold it in place.
7. Install the new heater core: Carefully install the new heater core, ensuring it's properly seated and aligned.
8. Reconnect the heater hoses: Make sure the connections are tight and secure.
9. Reassemble the dashboard: This is the reverse of step 3. Take your time and make sure everything is put back in place correctly.
10. Refill the cooling system: Carefully add coolant to the radiator and engine, checking for leaks.
11. Bleed the cooling system: This is crucial to remove any air pockets in the system. Consult your repair manual for the correct bleeding procedure.
12. Test the heater: Turn on the heater and check for leaks and proper heating.
Important Considerations:
* Take pictures: As you disassemble the dashboard, take many pictures. This will be invaluable when reassembling.
* Label wires and connectors: Use labels or masking tape to keep track of wire connections.
* Use a repair manual: This cannot be stressed enough. A shop manual specific to your vehicle will guide you through the exact steps and provide crucial diagrams.
Again, this is a complex repair. If you're unsure about any step, do not proceed. Seek professional help. The cost of a professional repair may be less than the cost of a damaged dashboard or other components if you attempt this without the necessary knowledge and experience.
