Replacing ball joints is a fairly involved job requiring specialized tools and mechanical knowledge. It's generally considered an intermediate to advanced automotive repair task. Here's a summary of what's involved:
What you'll need:
* Jack and jack stands: Crucial for safety. Never work under a car supported only by a jack.
* Wheel chocks: To secure the vehicle.
* Socket set and wrenches: Various sizes will be needed.
* Ball joint separator: This tool is essential for separating the ball joint from the control arm. A pickle fork can damage the control arm, so it's best avoided.
* Ball joint press (optional but recommended): Makes pressing in the new ball joint much easier and safer. A hammer and socket can be used, but it's more difficult and carries a higher risk of damage.
* Torque wrench: To tighten the new ball joint to the manufacturer's specifications.
* New ball joints: Make sure you get the correct part number for your vehicle.
* Penetrating oil: To help loosen rusted components.
* Grease: For the new ball joints.
* Shop manual: A repair manual specific to your 1996 Grand Marquis is invaluable. It will provide detailed instructions, torque specifications, and diagrams.
General Steps (This is a simplified overview – consult your shop manual for precise instructions):
1. Safety First: Disconnect the battery's negative terminal. Secure the vehicle with jack stands and chocks.
2. Remove the wheel: Loosen the lug nuts before jacking up the car.
3. Disconnect the brake caliper: Support the caliper to prevent it from hanging by the brake line.
4. Disconnect the steering linkage: This will vary depending on the specific design.
5. Disconnect the ABS sensor (if equipped):
6. Remove the cotter pin and castle nut from the ball joint:
7. Separate the ball joint from the control arm: This is where the ball joint separator is crucial.
8. Remove the old ball joint: This may require a press.
9. Install the new ball joint: Use a press if possible. Lubricate the new ball joint thoroughly.
10. Reassemble everything in reverse order: Make sure to tighten all bolts and nuts to the correct torque specifications (found in your shop manual).
11. Check your work: Inspect for leaks or loose components.
12. Alignment: After replacing ball joints, you absolutely must have your vehicle's front-end alignment checked and corrected by a professional. Improper alignment can lead to premature tire wear and handling issues.
Recommendation:
Unless you have significant experience working on cars, it's strongly recommended that you take your 1996 Grand Marquis to a qualified mechanic to have the ball joints replaced. This is a critical safety component, and improper installation can have serious consequences. The cost of professional repair is far less than the potential cost of an accident.
