1. Preparation:
* Gather Tools: You'll need a variety of tools, including:
* Socket set (metric)
* Wrenches (metric)
* Screwdrivers (Phillips and possibly flathead)
* Pliers
* Penetrating oil (like PB Blaster)
* New wiper linkage bushings (ensure you get the correct part number for your vehicle)
* Rags or shop towels
* Possibly a small pry bar or plastic trim removal tool
* Consult a Repair Manual: A Haynes or Chilton repair manual specific to your 2007 Chevy Impala will be invaluable. It provides detailed diagrams, torque specifications, and step-by-step instructions tailored to your car. This is highly recommended.
* Disconnect the Battery: This is a crucial safety precaution to prevent accidental shorts or damage to electrical components.
2. Accessing the Wiper Linkage:
* Remove the Wiper Arms: This usually involves using a wiper arm puller tool (available at most auto parts stores) to carefully remove the wiper arms from the wiper spindles. Mark their position before removal to ensure correct reinstallation.
* Remove the Wiper Cowl: This plastic cover protects the linkage mechanism. It typically involves removing several screws or clips. Be gentle to avoid breaking any clips.
* Locate the Linkage: The linkage is usually situated underneath the wiper cowl and may be connected to the transmission via several components, potentially including nuts, bolts, and possibly a connecting rod.
3. Replacing the Bushings:
* Identify the Worn Bushings: Carefully inspect the linkage for worn or damaged bushings. They are typically small rubber or plastic components that allow for smooth articulation of the linkage arms.
* Remove the Old Bushings: This step is the most challenging and depends on the type of bushing. Some might be pressed in, while others might be held in place by clips or screws. You might need to use pliers, a small pry bar, or other tools to carefully remove them. Penetrating oil can help loosen things up.
* Install the New Bushings: Carefully install the new bushings, ensuring they are properly seated. Refer to your repair manual for the correct orientation and installation method.
4. Reassembly:
* Reconnect the Linkage: Reassemble the linkage components, making sure everything is properly aligned.
* Reinstall the Wiper Cowl: Securely reattach the wiper cowl, ensuring all screws and clips are in place.
* Reinstall the Wiper Arms: Attach the wiper arms back to their spindles, making sure they are correctly aligned and securely fastened. Tighten the nut securing each arm to the specified torque.
* Reconnect the Battery: Reconnect the battery terminal.
5. Testing:
* Test the Wipers: Turn on your wipers and check for smooth, consistent operation. Listen for any unusual noises. If there are any issues, carefully recheck your work.
Important Considerations:
* Patience is key: This is a delicate job, and rushing can lead to damage or improper installation.
* Photography: Take pictures at each step of disassembly to help with reassembly.
* Parts: Ensure you obtain the correct replacement bushings for your specific 2007 Chevy Impala model. Your VIN (Vehicle Identification Number) can help you get the right parts from a dealer or auto parts store.
* Professional Help: If you are uncomfortable performing this repair yourself, consider taking your vehicle to a qualified mechanic.
This is a general guide. Always refer to a repair manual specific to your 2007 Chevy Impala for detailed instructions and diagrams. Improper repair could lead to malfunctioning wipers and potentially damage to other components. Safety is paramount; if in doubt, seek professional assistance.
