Here's a general outline of the process. Remember, this is a *general guide* and may vary slightly depending on your engine:
Tools you'll likely need:
* Socket wrench set: Various sizes, including likely a 10mm, 13mm and possibly others.
* Wrench set: May be needed for some stubborn bolts.
* Pliers: Needle-nose pliers might be handy.
* Drain pan: To catch coolant.
* New thermostat: Make sure to get the correct one for your engine.
* New thermostat gasket: Essential to prevent leaks.
* Coolant: Use the correct type for your vehicle.
* Jack and jack stands (highly recommended): For safety and easier access.
* Gloves: To protect your hands.
* Rags or shop towels: To clean up spills.
* Funnel: To refill the coolant.
Steps (general outline - refer to your repair manual for specifics):
1. Safety First: Disconnect the negative battery terminal. Allow the engine to cool completely before starting. Working on a hot engine is dangerous.
2. Drain the Coolant: Locate the drain plug at the bottom of the radiator. Place your drain pan underneath and carefully open the drain plug to allow the coolant to drain completely.
3. Access the Thermostat Housing: This is the most engine-specific part. You'll likely need to remove some components to gain access, such as parts of the fan shroud, air intake, or other components near the thermostat housing. Your repair manual will provide detailed instructions on this. Often, the housing is located on the engine block, near the cylinder head.
4. Remove the Thermostat Housing: Unscrew the bolts holding the thermostat housing in place. Be careful not to damage the housing or surrounding components.
5. Remove the Old Thermostat: Once the housing is removed, the thermostat will be visible. Carefully remove the old thermostat, noting the orientation of the gasket. Discard the old gasket.
6. Install the New Thermostat and Gasket: Install the new gasket into the housing. Carefully insert the new thermostat into the housing, ensuring it's correctly seated.
7. Reinstall the Thermostat Housing: Carefully reinstall the thermostat housing, ensuring that all bolts are tightened to the manufacturer's specifications. Do not overtighten.
8. Refill the Cooling System: Carefully refill the cooling system with the correct type and amount of coolant. Refer to your owner's manual for the proper coolant capacity.
9. Bleed the Air: After refilling, bleed the air from the cooling system. This is usually done by opening the radiator cap and running the engine until the thermostat opens and coolant flows freely, then closing the cap and topping off the coolant. Your repair manual will specify the procedure.
10. Reconnect the Battery: Reconnect the negative battery terminal.
11. Test Run: Start the engine and let it run for a while, checking for leaks. Monitor the temperature gauge to ensure the engine is reaching the correct operating temperature.
Important Considerations:
* Repair Manual: Having a repair manual specific to your 1990 Chrysler LeBaron convertible is essential. The steps and specific locations of components will vary based on the engine type.
* Coolant Type: Use the correct type of coolant recommended by Chrysler for your vehicle. Mixing different types can damage your engine.
* Safety: Always prioritize safety. Wear appropriate safety gear and take your time. If you are not comfortable performing this repair, take it to a qualified mechanic.
This is a simplified overview. Consult your repair manual for detailed instructions, diagrams, torque specifications, and specific part numbers. Improperly completing this repair can lead to engine damage. If you are unsure about any step, seek professional help.
