Tools You'll Need:
* Brake fluid: Use DOT 3 or DOT 4 brake fluid, as specified in your owner's manual. Never use DOT 5 silicone-based fluid in a conventional braking system.
* Brake bleeding wrench: A wrench that fits your bleeder valve (usually 8mm or 10mm). A wrench with a short handle is easier to manage.
* Clear tubing: Long enough to reach a container to catch the fluid.
* Container: To collect the old brake fluid.
* Socket wrench and ratchet: For removing the brake fluid reservoir cap if necessary (some reservoirs just have a cover).
* Shop rags or paper towels: To clean up spills.
* A helper: This process is significantly easier with a helper.
Procedure (Assuming No ABS):
1. Safety First: Wear safety glasses to protect your eyes from brake fluid splashes. Brake fluid can damage paint, so be careful not to spill it.
2. Locate the Bleeder Valves: These are usually located on the top of each brake caliper (two per wheel on the front, one per wheel on the rear). They are small, typically capped valves.
3. Check Brake Fluid Level: Make sure the brake fluid reservoir is filled to the "MAX" line. Add fluid as needed throughout the bleeding process, as the fluid level will drop.
4. Bleeding Order: The standard bleeding order is usually:
* Rear passenger side wheel
* Rear driver side wheel
* Front passenger side wheel
* Front driver side wheel
This order helps push air out of the system most efficiently.
5. Bleeding a Single Wheel:
* Have your helper pump the brake pedal several times and then hold it down.
* Open the bleeder valve slightly using the wrench.
* Keep the valve open until the pedal goes to the floor and then slowly close the valve.
* Have your helper release the pedal.
* Repeat this process until clear fluid is flowing out of the bleeder valve without bubbles.
6. Repeat for all Wheels: Repeat the above steps for each wheel, following the bleeding order. Check and top off the brake fluid reservoir frequently.
7. Check Brake Pedal: After bleeding all four wheels, check your brake pedal for firmness. If it's still soft, you may have air remaining in the system. You may need to repeat the bleeding process.
If your 1997 Buick Regal has ABS:
Bleeding brakes on a car with ABS is significantly more complicated and often requires a pressure bleeder or a scan tool to properly bleed the system. Improperly bleeding ABS brakes can damage the system. You should take your car to a professional mechanic if it has ABS. Attempting to bleed the system yourself without the proper tools and knowledge could cause serious damage.
Important Considerations:
* Spongy Pedal: A spongy brake pedal after bleeding indicates a problem; air is still present, you may have a leak in the system, or your master cylinder may be failing. A professional mechanic should diagnose this.
* Brake Fluid is Corrosive: Clean up any spills immediately.
* If you are uncomfortable performing this task, take your car to a qualified mechanic. Bleeding brakes incorrectly can lead to brake failure, which is extremely dangerous.
Remember to consult your owner's manual for specific instructions and diagrams for your 1997 Buick Regal. This is a general guide, and variations exist between models and years.
