However, if you're determined to attempt it yourself, here's a general outline. This is not a step-by-step guide, but rather a summary of the major steps involved. You'll need a detailed repair manual specific to your 1993 Ford Tempo GL 2.3L to get accurate instructions and diagrams. A Haynes or Chilton manual would be a good investment.
Major Steps (General):
1. Preparation: Disconnect the negative battery terminal. Drain the coolant system completely. This is crucial to avoid a huge mess.
2. Dashboard Removal (The Most Difficult Part): This is the most time-consuming and intricate step. You'll likely need to remove various components of the dashboard, including the radio, glovebox, and possibly the steering column shroud. This process varies considerably between vehicles, and a detailed repair manual is absolutely essential here. Take pictures as you disassemble to aid reassembly.
3. Access to the Heater Core: Once the dashboard is partially disassembled, you'll gain access to the heater core, located behind the dashboard.
4. Disconnect Heater Core Hoses: Carefully disconnect the heater core hoses. Have a catch pan ready to collect the remaining coolant.
5. Remove the Heater Core: This often involves removing mounting bolts or clips holding the heater core in place. The core itself may be difficult to maneuver out due to its location and size.
6. Install the New Heater Core: Carefully install the new heater core in the same manner it was removed. Ensure that it is properly seated and secured.
7. Reconnect Heater Core Hoses: Reconnect the heater core hoses, ensuring they are tight and not leaking.
8. Reassemble Dashboard: Carefully reassemble the dashboard, referencing the pictures you took during disassembly. This is the reverse of step 2.
9. Refill Coolant System: Refill the coolant system with the correct type and amount of coolant. Bleed the air from the system to prevent overheating. This is crucial.
10. Test: Start the engine and check for leaks. Run the heater to ensure it's functioning correctly.
Important Considerations:
* Repair Manual: You absolutely NEED a repair manual specific to your vehicle. Generic instructions won't suffice.
* Tools: You'll need a variety of tools, including various wrenches, screwdrivers, sockets, pliers, and possibly specialized dashboard removal tools.
* Patience: This is a time-consuming job. Expect to spend several hours, potentially a full day or more.
* Coolant: Use the correct type and amount of coolant for your vehicle. Improper coolant can damage your engine.
* Safety: Wear safety glasses and gloves throughout the process.
Again, this is a complex repair. If you're not comfortable with this level of automotive repair, take your vehicle to a qualified mechanic. The cost of a professional repair will likely be less than the potential cost of damaging your vehicle further during a DIY attempt.
