Installing an engine coolant thermostat on a 1985 Dodge Charger (or any car for that matter) requires some mechanical aptitude and tools. It's not a simple plug-and-play operation. Here's a general outline, but this is not a substitute for a proper repair manual specific to your 1985 Dodge Charger's engine:
1. Safety First: Let the engine cool completely before starting any work. Coolant is hot and can cause serious burns. Wear safety glasses and gloves.
2. Gather Tools and Supplies: You'll need a wrench or socket set (the size will depend on your specific engine), a new thermostat (make sure to get the correct one for your engine!), new gasket (usually included with the thermostat), coolant (the correct type for your engine), a drain pan, and potentially some rags.
3. Drain Coolant: Locate the drain plug at the bottom of the radiator (or engine block, depending on the design). Carefully open it and let the coolant drain into your drain pan.
4. Remove Thermostat Housing: The thermostat housing is usually located on the engine block, near the top hose of the radiator. You'll likely need to loosen or remove the hose clamps to access it. Carefully remove the housing bolts and remove the housing. The old thermostat will be inside.
5. Install New Thermostat and Gasket: Inspect the housing for any damage or debris. Install the new gasket (if needed) and then carefully place the new thermostat into the housing. Ensure it's seated correctly.
6. Reassemble: Carefully reassemble the housing, making sure the bolts are tightened evenly to avoid cracking the housing. Reattach the hoses.
7. Refill Coolant: Refill the radiator and overflow reservoir with the correct type and amount of coolant. Check your owner's manual for the correct coolant type and capacity.
8. Bleed the Cooling System (Important): Air bubbles trapped in the cooling system can cause overheating. Consult your repair manual on the proper bleeding procedure for your specific engine. This often involves running the engine and monitoring the coolant level.
9. Test: Run the engine and monitor the temperature gauge. Ensure it reaches operating temperature without overheating. Check for leaks around the thermostat housing.
Disclaimer: This is a general outline. The specific steps and tools required may vary depending on your Charger's engine (e.g., V6, V8). Always consult a repair manual specific to your 1985 Dodge Charger and its engine for detailed instructions and torque specifications. If you're not comfortable performing this repair yourself, take your car to a qualified mechanic. Improperly replacing the thermostat can lead to engine damage.
