Here's a general overview of the process, keeping in mind variations may exist depending on the specific mount design:
1. Preparation:
* Safety First: Disconnect the negative battery cable. Wear safety glasses and gloves.
* Gather Tools: You'll need various wrenches (likely metric and SAE), sockets, possibly a ratchet, jack stands (crucial!), and potentially a pry bar or similar tool for stubborn mounts.
* Consult a Manual: A repair manual specific to your 1977 Corvette is essential. It will show you the exact location and type of mounts, and provide torque specifications for reassembly.
* Drain the Coolant: Completely drain the radiator and engine block of coolant. This is crucial to avoid spills.
2. Accessing the Mounts:
* Raise the Vehicle: Safely raise the front of the Corvette using jack stands. Never work under a vehicle supported only by a jack.
* Remove Necessary Components: This is where your repair manual is vital. You'll likely need to remove some components to gain access to the radiator mounts. This might include:
* Fan shroud: This often obstructs access.
* Fan: May need removal depending on the mount location.
* Possibly parts of the front bumper or support structure: Access to the lower mounts might require this.
* Identify the Mounts: Carefully locate the radiator mounts. They are typically rubber or metal pieces connecting the radiator to the frame or support structure.
3. Removing the Old Mounts:
* Disconnect the Mounts: Carefully remove the bolts or fasteners securing the old mounts to both the radiator and the chassis. Use the correct size sockets and wrenches.
* Remove the Old Mounts: Once the fasteners are removed, gently separate the old mounts from the radiator and the chassis. They might be stubborn due to corrosion or age. A pry bar might be needed, but use it carefully to avoid damaging surrounding parts.
4. Installing the New Mounts:
* Position the New Mounts: Carefully position the new mounts on both the radiator and chassis. Ensure they are correctly aligned.
* Secure the Mounts: Tighten the bolts or fasteners according to the torque specifications in your repair manual. Do not overtighten.
* Reinstall Components: Reinstall any components you removed earlier (fan shroud, fan, etc.) in reverse order of removal.
5. Reassembly and Testing:
* Refill the Coolant: Carefully refill the radiator and engine block with the correct type and amount of coolant.
* Check for Leaks: Inspect for any coolant leaks.
* Start the Engine: Start the engine and let it run for a while. Check for leaks again.
* Check Temperature Gauge: Monitor the engine temperature gauge to ensure proper cooling.
Important Considerations:
* Corrosion: Expect corrosion, especially on older vehicles. Penetrating oil might help loosen rusted bolts.
* Damaged Parts: Be prepared for the possibility of encountering other damaged components during this process.
* Professional Help: If you're not comfortable working on your car, consider seeking professional help from a mechanic. Improper repair can lead to overheating and engine damage.
This is a general overview. Always refer to a 1977 Corvette-specific repair manual for detailed instructions and diagrams before attempting this repair. Safety is paramount – take your time and don't rush the process.
