Here's a general overview. Specific steps and tools may vary slightly depending on your Blazer's 4x4 configuration (if applicable). Always consult a repair manual specific to your vehicle's year and model for detailed instructions and torque specifications.
Tools You'll Likely Need:
* Jack and jack stands: Essential for safely lifting the vehicle. Never work under a vehicle supported only by a jack.
* Wheel chocks: To secure the wheels.
* Lug wrench: To remove the wheels.
* Socket set and wrenches: Various sizes, including metric and possibly SAE.
* Ball joint separator: A crucial tool for separating the ball joint from the knuckle. There are several types, including pickle forks (generally less recommended due to potential damage) and hydraulic ball joint separators (preferred).
* Hammer: May be needed to assist with separating parts.
* Torque wrench: Absolutely necessary to tighten bolts to the correct specifications.
* Penetrating oil (PB Blaster or similar): Soak the ball joint bolts and other fasteners for several hours before attempting removal. This greatly reduces the chance of stripping bolts.
* New upper ball joints: Ensure you get the correct parts for your vehicle.
* Grease: For lubricating the new ball joints.
* Safety glasses and gloves: Always protect yourself.
General Steps (Consult your repair manual for precise details):
1. Safety First: Park on a level surface, engage the parking brake, and chock the wheels. Lift the Blazer using the jack and securely support it with jack stands.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Disconnect Components: This step will vary depending on your Blazer's setup. You may need to disconnect the sway bar link, brake caliper, and possibly other suspension components to gain access to the ball joint. Consult your repair manual to determine the specific steps.
4. Separate the Ball Joint: This is the most challenging part. Apply penetrating oil generously to the ball joint's retaining nut and the joint itself. After allowing sufficient soak time, use your ball joint separator to carefully separate the ball joint from the steering knuckle. Be patient and avoid damaging surrounding components.
5. Remove the Old Ball Joint: Once separated, remove the retaining nut and cotter pin. The old ball joint may require some persuasion to remove from the control arm.
6. Install the New Ball Joint: Carefully install the new upper ball joint into the control arm. Ensure it's properly seated.
7. Reassemble: Reinstall the retaining nut, cotter pin, and all other components you disconnected. Tighten all bolts to the manufacturer's specified torque values using your torque wrench. Refer to your repair manual for these values.
8. Lower the Vehicle: Carefully lower the Blazer using the jack.
9. Check and Adjust: Once the vehicle is back on the ground, double-check all connections and torque settings. Test the steering and suspension for proper operation. You may need a wheel alignment after replacing ball joints.
Important Considerations:
* Pressing: Some ball joints require pressing tools for installation. If this is the case, you may need to take the control arm and ball joint to a professional shop for this step.
* Alignment: After replacing ball joints, a wheel alignment is highly recommended to ensure proper tire wear and safe handling.
* Repair Manual: A repair manual specific to your 1995 Chevrolet Blazer is invaluable. It will provide detailed diagrams, torque specifications, and step-by-step instructions.
This is a simplified overview. This process is complex and involves critical safety considerations. Again, if you are not comfortable performing this repair yourself, take your Blazer to a qualified mechanic. Improper installation can lead to serious damage or injury.
