1. Safety First:
* Park on a level surface: Engage the parking brake firmly.
* Cool down the transmission: Let the car sit for several hours after driving to allow the transmission fluid to cool. Hot fluid is under pressure and can cause serious burns.
* Wear safety glasses: Transmission fluid can splash.
* Have rags and a drain pan ready: You will likely spill some fluid.
2. Locate the Line:
* The transmission cooler lines are usually connected to the radiator near the top, on one of the radiator's tanks (often the passenger side). They're usually metal lines, but could be rubber hoses.
3. Prepare for Loosening:
* Identify the connection: Determine if the connection is a flare nut (common) or a compression fitting (less common).
* Use the correct wrench: For flare nuts, you'll need a wrench that fits the nut snugly—an open-ended wrench is usually preferred, but a combination wrench works too. For compression fittings, you might need a special tool depending on the fitting type.
* Penetrating oil (optional but recommended): Apply penetrating oil (like PB Blaster) to the fitting several hours before you start working to help break loose any corrosion or rust.
4. Loosening the Line:
* Position the wrench: Place the wrench firmly on the nut.
* Apply steady pressure: Turn the nut counterclockwise to loosen it. Don't use excessive force; if it's stuck, try using a wrench with a longer handle for more leverage. A pipe wrench should only be a last resort, and be careful not to damage the fitting.
* Gradual loosening: Loosen the nut slowly to avoid sudden fluid release. Have your drain pan and rags ready to catch any spills.
5. After Loosening:
* Disconnect the line: Once the nut is loosened enough, carefully disconnect the line. Be prepared for fluid to leak out.
* Clean the connection: Clean any debris from the fitting and the line before reconnecting (if that is your goal).
Important Notes:
* If you're unsure about any step, consult a repair manual specific to your 2000 Chevy Impala. A Haynes or Chilton manual will provide detailed diagrams and instructions.
* If you are uncomfortable performing this task yourself, take your car to a qualified mechanic. Improperly handling transmission fluid can damage your transmission.
* Transmission fluid is toxic. Avoid skin contact and inhalation. Dispose of used fluid properly according to local regulations.
Remember to replace the line and any seals or gaskets as needed when you reassemble everything. Good luck!
