Here's a general overview of the steps involved. Remember, this is a *general* guide, and details may differ significantly from your specific vehicle:
1. Preparation:
* Disconnect the battery: This is crucial to prevent electrical shorts.
* Drain the coolant: Completely drain the engine's cooling system.
* Gather tools: You'll need a variety of tools, including screwdrivers (Phillips and flathead), wrenches (metric), sockets, pliers, possibly a special heater core hose compressor tool, and potentially a sealant for the hoses.
* Protect your workspace: Use drop cloths or towels to protect your vehicle's interior.
2. Accessing the Heater Core:
* Dash removal (likely): This is the most labor-intensive part. You'll likely need to remove parts of the dashboard, including the instrument panel, glove box, and possibly the steering column (partially or fully depending on the access). This usually involves removing screws, bolts, and various clips. Refer to your repair manual for precise instructions and diagrams.
* Removing other components: You may need to remove or disconnect other components to gain access to the heater core, such as the HVAC blower motor, air ducts, and possibly parts of the firewall.
3. Removing the Heater Core:
* Disconnect hoses: Carefully disconnect the heater core hoses. Have containers ready to catch any remaining coolant. You may need to use pliers or the special compressor tool to pinch off the hoses to minimize coolant spillage.
* Remove the heater core: The heater core is usually located within the HVAC housing behind the dashboard. Once the hoses are disconnected, you'll need to carefully remove the heater core from its mounting location. This often involves unbolting or unclipping it. This step can be challenging due to limited space.
* Inspect the heater core housing: Check for any damage or debris within the housing.
4. Installing the New Heater Core:
* Install the new heater core: Carefully install the new heater core in the reverse order of removal. Ensure it's seated correctly.
* Reconnect hoses: Reconnect the heater hoses, making sure they're properly secured and clamped.
* Reassemble everything: Carefully reassemble all the components you removed, referring to your repair manual for the correct order and torque specifications.
5. Refill and Bleed the Cooling System:
* Refill the cooling system: Refill the cooling system with the correct coolant mixture.
* Bleed the cooling system: Properly bleed the cooling system to remove any air pockets. This is essential to prevent overheating. Consult your repair manual for the proper bleeding procedure.
Warnings:
* This is a complex job. If you're not comfortable with automotive repair, it's best to take your Caprice to a qualified mechanic.
* Incorrect assembly can lead to leaks and damage. Take your time and follow the repair manual meticulously.
* Coolant is toxic. Handle it with care and wear appropriate safety gear.
Again, I strongly recommend obtaining a repair manual specific to your 1985 Chevrolet Caprice before attempting this repair. The manual will provide detailed instructions, diagrams, and torque specifications necessary for a successful repair. Improperly completing this task can lead to significant damage and costly repairs.
