Can you change it yourself? Maybe. It depends on your comfort level with basic automotive maintenance. If you're mechanically inclined and have some basic tools, it's definitely doable. If you're not comfortable working on your car, it's best to take it to a mechanic.
Here's what's involved:
* Tools: You'll need a socket wrench (probably a 10mm or 13mm, but you'll need to check a repair manual or online resources specific to your car to confirm), pliers, possibly a screwdriver depending on the housing design, and a new thermostat of the correct specifications for your engine. You'll also need a drain pan to catch the coolant.
* Safety: The coolant in your car is hot and potentially hazardous. Allow the engine to cool completely before starting any work. Wear gloves and eye protection.
* Draining Coolant: You'll need to drain some of the coolant from the system before you can replace the thermostat. Locate the drain plug on the radiator and carefully drain the coolant into a suitable container.
* Removing the Thermostat Housing: Once the coolant is drained, you'll need to remove the thermostat housing. This usually involves removing a few bolts or clamps.
* Replacing the Thermostat: Install the new thermostat, making sure the gasket is properly seated.
* Reassembling: Reassemble the housing and carefully refill the cooling system with the correct type of coolant (refer to your owner's manual).
* Bleeding the System: After refilling, you'll need to bleed the cooling system to remove any air bubbles. Consult your owner's manual for instructions on how to do this.
Before you start:
1. Consult a Repair Manual: A repair manual specific to your 1992 Buick LeSabre 6-cylinder is invaluable. It will provide detailed instructions, diagrams, and torque specifications. You can find these manuals online or at auto parts stores.
2. Identify the Correct Thermostat: Make sure you purchase the correct thermostat for your engine. The wrong thermostat can damage your engine. Use your car's VIN number or the engine code to ensure you get the right part.
If you're hesitant about tackling this job yourself, taking it to a mechanic is a safer and often more cost-effective option in the long run (especially if you damage something in the process). The labor cost will be considerably less than the cost of a major repair due to an incorrectly installed thermostat.
