Here's a step-by-step guide, but remember that variations may exist depending on your specific Corsica's configuration. Consult your owner's manual for model-specific details.
Tools you'll need:
* Drain pan: Large enough to hold several gallons of coolant.
* Wrench: To remove the drain plug (likely a 13mm or 15mm; check your manual).
* Hose: Garden hose is fine for flushing.
* Funnel: To add new coolant.
* Coolant: Use the type recommended in your owner's manual (usually a 50/50 mix of antifreeze and distilled water).
* Gloves: Protect your hands from the coolant.
* Safety Glasses: Protect your eyes from splashes.
* Optional: Radiator flush chemical (follow product instructions carefully)
Steps:
1. Cool Down: Let the engine cool completely. This is crucial to prevent burns.
2. Locate Drain Plug: The radiator drain plug is typically located at the bottom of the radiator. It's usually a bolt or a cap.
3. Drain the Coolant: Place the drain pan under the radiator drain plug. Carefully remove the plug and let the coolant drain completely. This may take some time.
4. Remove Lower Radiator Hose: Locate the lower radiator hose where it connects to the radiator. Carefully loosen the clamp and disconnect the hose. More coolant will drain out. Have a catch pan ready.
5. Flush with Water: Connect a garden hose to the upper radiator hose opening (where the upper hose connected to the radiator). Turn the water on slowly, ensuring a gentle flow. Let the water flush out the system for several minutes. Water should run relatively clear from the lower hose opening.
6. Optional: Chemical Flush: If using a radiator flush chemical, follow the manufacturer's instructions carefully. This usually involves adding the chemical to the system, running the engine for a short period, and then draining again before refilling.
7. Reconnect Lower Radiator Hose: Once the water runs relatively clear, turn off the water and reconnect the lower radiator hose. Secure the clamp.
8. Refill Radiator: Using a funnel, carefully add the correct amount of 50/50 antifreeze/distilled water mixture. Refer to your owner's manual for the proper capacity.
9. Bleed the Air: Air pockets in the cooling system can cause overheating. Start the engine and let it run until the thermostat opens (the upper radiator hose will become warm). Keep an eye on the coolant level and add more if necessary. Check your owner's manual for specific bleeding instructions for your model. Some vehicles require opening a bleed valve located on the engine.
10. Check for Leaks: Inspect the system for any leaks after running the engine.
11. Dispose of Old Coolant Properly: Used coolant is hazardous waste. Dispose of it according to local regulations. Many auto parts stores accept used coolant for recycling.
Important Considerations:
* Pressure Testing: For a more thorough job, a radiator pressure tester can identify leaks that might not be apparent otherwise.
* Thermostat: Consider replacing the thermostat while you're at it, as a faulty thermostat can impede proper cooling system operation.
* Hose Condition: Inspect your hoses for cracks or bulges; replace them if necessary.
This is a general guide. For a more specific procedure, consult your 1993 Chevrolet Corsica's owner's manual. If you're uncomfortable performing this task yourself, take your vehicle to a qualified mechanic.
