Tools You'll Need:
* Wiper arm puller: This is crucial. Trying to pry them off with screwdrivers will almost certainly damage the wiper arm or the splines on the wiper transmission.
* Penetrating oil (PB Blaster, Liquid Wrench, etc.): Spray this generously on the wiper arm nut (if it has one) and where the wiper arm connects to the transmission. Let it sit for at least 15-20 minutes to loosen things up.
* Wrench (likely a 10mm or 12mm, but check your car): If there's a nut securing the wiper arm, you'll need a wrench of the appropriate size.
* Gloves: To protect your hands.
* Rags or shop towels: To clean up any penetrating oil or debris.
Procedure:
1. Disconnect the battery: This is a safety precaution to prevent accidental short circuits.
2. Apply penetrating oil: Liberally spray the penetrating oil onto the area where the wiper arm connects to the wiper transmission. Focus on getting it under the wiper arm itself. Let it soak for at least 15-20 minutes, longer if needed. Reapply if necessary.
3. Use the wiper arm puller: This tool is designed to grip the wiper arm and gently but firmly pull it off the transmission shaft. Follow the instructions provided with your specific wiper arm puller. They usually involve centering the puller on the wiper arm and then tightening the puller's nut or bolt. This applies pressure to the wiper arm, slowly separating it from the splined shaft.
4. If there's a nut: If your wiper arm is secured by a nut, loosen and remove it *before* using the wiper arm puller. Sometimes this nut is hidden under a plastic cap.
5. Remove the wiper arm: Once the puller is securely attached and tightened, slowly and carefully apply pressure to remove the wiper arm. It might require a bit of force, but it should come off relatively easily once the penetrating oil has done its job. If it's stuck, reapply penetrating oil and let it soak again. Avoid using excessive force, as you risk damaging the wiper motor or the wiper arm itself.
6. Repeat for the other arm: Follow steps 2-5 for the other wiper arm.
7. Reconnect the battery: Once both wiper arms are removed, reconnect the battery.
Important Considerations:
* Stubborn Arms: If the arms are particularly stubborn, you might need to use more penetrating oil and let it sit overnight.
* Damage: If you damage the wiper arm or the splined shaft during removal, you may need to replace them.
* Professional Help: If you're uncomfortable performing this task yourself, it's best to take your car to a mechanic.
Remember safety first! If you're unsure about any step, it's always best to seek professional help. Improper removal can lead to damage to your vehicle's wiper system.
