What you'll need:
* Brake fluid: Use DOT 3 brake fluid. Never use DOT 5, as it's silicone-based and incompatible with most brake systems.
* Wrench(es): You'll need wrenches that fit the bleeder valve size on your calipers and wheel cylinders (usually 8mm or 10mm). A line wrench is recommended to avoid rounding off the bleeder valve.
* Clear tubing: About 3-4 feet of clear tubing to connect the bleeder valve to a collection bottle. The tubing should be long enough to reach a collection container on the ground.
* Collection bottle: A jar or bottle to catch the old brake fluid.
* Helper: You absolutely need a helper to pump the brake pedal.
* Gloves: Brake fluid is corrosive. Protect your hands.
* Shop rags or paper towels: To clean up spills.
Procedure:
1. Locate Bleeder Valves: The bleeder valves are located on the calipers at each wheel (front and rear). They are small, usually hexagonal fittings.
2. Prepare the System: Check the brake fluid reservoir level. It should be near the "FULL" mark. Top it off with fresh DOT 3 fluid if necessary.
3. Order of Bleeding: The most common order is: Rear passenger side, rear driver's side, front passenger side, front driver's side. This helps to ensure that the furthest point from the master cylinder is bled first. However, some mechanics prefer a diagonal approach (e.g., RR, FL, RL, FR). Your owner's manual might specify a particular order.
4. Attach Tubing: Open the bleeder valve a small amount. Using the tube, connect it to the bleeder valve and submerge the other end in the collection jar filled with enough fluid to submerge the tube end, ensuring no air can enter. This helps avoid introducing air back into the system.
5. Pump the Brakes (with Helper): Have your helper firmly and repeatedly pump the brake pedal several times. Tell them to hold the pedal down.
6. Open the Bleeder Valve: Slowly open the bleeder valve while your helper holds the pedal down. You should see old brake fluid with possibly some air bubbles exiting the line. If no fluid comes out, close the bleeder valve and have your helper pump the brakes again.
7. Close the Bleeder Valve: Once the fluid runs clean and free of bubbles, close the bleeder valve while your helper still holds the pedal down.
8. Release the Pedal: Have your helper slowly release the brake pedal.
9. Repeat: Repeat steps 5-8 for each wheel, following the bleeding order.
10. Check Fluid Level: After bleeding all four wheels, check the master cylinder reservoir and add more fluid if needed.
11. Test Brakes: Once finished, carefully test the brakes in a safe, open area. Make sure the pedal feels firm and responsive.
Important Considerations:
* Air in the Lines: If you have trouble getting a firm pedal, or see many air bubbles, you may have air trapped deeper in the system. You might need to repeat the bleeding process several times. A vacuum bleeder can help with stubborn air bubbles.
* Brake System Problems: If you're having trouble bleeding the brakes, there might be a more serious problem with your brake system. It's always best to consult a mechanic if you're not comfortable or if the problem persists after multiple attempts.
* Safety: Always work in a well-ventilated area. Brake fluid is corrosive and harmful if ingested.
This information is for guidance only. Consult your owner's manual for specific instructions related to your 1998 Chevy Malibu, as procedures may vary slightly depending on the specific model. If you are not comfortable performing this procedure yourself, take your vehicle to a qualified mechanic.
