Here's a general overview of the process. Specific steps and tools may vary slightly depending on the year and model of your G20. Always consult a repair manual specific to your van's year and engine for precise instructions and torque specifications. Failure to follow proper procedures can lead to dangerous driving conditions.
Tools You'll Likely Need:
* Jack and jack stands: Crucial for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the van from rolling.
* Lug wrench: To remove the wheel.
* Socket set and wrenches: Various sizes, including metric and possibly SAE.
* Torque wrench: Essential for proper tightening of bolts.
* Ball joint separator: To separate the ball joint from the steering knuckle. A pickle fork can work, but a ball joint separator is less likely to damage components.
* Hammer and punch: Might be needed for stubborn components.
* Penetrating oil (PB Blaster, etc.): To loosen rusted bolts.
* Wheel alignment tool: After replacement, a wheel alignment is almost always necessary.
General Steps (Consult your repair manual for specifics):
1. Safety First: Engage the parking brake, chock the wheels, and use jack stands to safely lift the van. Disconnect the negative battery terminal.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Disconnect Components: This is where things get specific. You'll need to disconnect various components connected to the control arm:
* Brake line: May need to be carefully loosened or disconnected.
* ABS sensor wire (if equipped): Carefully disconnect the sensor wire.
* Sway bar link: Disconnect the sway bar link from the control arm.
* Stabilizer bar: Depending on the design, you might need to disconnect the stabilizer bar.
* Ball joint: This is often the most challenging part. Use a ball joint separator to separate the ball joint from the steering knuckle.
4. Remove the Control Arm Bolts: Locate and remove all bolts securing the control arm to the vehicle's frame and suspension. Penetrating oil might be necessary to loosen rusted bolts.
5. Remove the Old Control Arm: Carefully remove the old control arm.
6. Install the New Control Arm: Install the new control arm, ensuring everything is properly aligned.
7. Reassemble Components: Reassemble all components in the reverse order of removal, tightening bolts to the manufacturer's specified torque.
8. Lower the Vehicle: Carefully lower the vehicle using the jack stands.
9. Wheel Alignment: Take your vehicle to a tire shop for a wheel alignment. This is crucial for safe and proper handling.
Important Considerations:
* Rust: On older G20 vans, rust can be a major problem. Be prepared for broken bolts and significant time spent freeing rusted components.
* Repair Manual: A repair manual specific to your G20's year and model is indispensable. It will provide detailed diagrams, torque specifications, and step-by-step instructions.
* Parts: Ensure you purchase the correct replacement control arm for your van.
This is a simplified overview. The actual process can be much more complex and time-consuming. Again, if you're not comfortable with this type of repair, take your van to a qualified mechanic. Improperly installed suspension components can lead to dangerous driving conditions and serious injury.
