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What order do you do a brake flush?

Performing a brake fluid flush is an essential maintenance task for your vehicle's braking system. This process involves completely replacing the old, contaminated brake fluid with fresh, clean fluid to ensure optimal braking performance and safety. Here's a step-by-step guide on how to properly do a brake flush.


Steps for Completing a Brake Fluid Flush



  1. Prepare the Vehicle: Park your vehicle on a level surface and apply the parking brake. Locate the brake fluid reservoir, usually under the hood near the master cylinder.

  2. Drain the Old Fluid: Using a turkey baster or fluid transfer pump, siphon out as much of the old brake fluid as possible from the reservoir. Dispose of the old fluid properly.

  3. Refill with New Fluid: Carefully pour in new, high-quality brake fluid, being careful not to spill any. Fill the reservoir to the "Full" or "Max" line.

  4. Bleed the Brakes: This is a crucial step to remove any air bubbles from the brake lines. Start with the brake furthest from the master cylinder and work your way towards the closest one, using a brake bleeding tool to push the fluid through the system.

  5. Repeat the Process: Continue to bleed each brake until the fluid coming out is clear and free of air bubbles. Top up the reservoir as needed during this process.

  6. Final Inspection: Once all brakes have been bled, check the fluid level in the reservoir and top it up if necessary. Test the brakes to ensure they are working properly before driving the vehicle.


Performing a complete brake fluid flush is recommended every 2-3 years or as specified in your vehicle's maintenance schedule. This helps maintain the integrity of the brake system and ensures optimal braking performance and safety.

Can I just add brake fluid without flushing?


Yes, you can. You can add brake fluid without removing the old fluid from your reservoir. If your brake system is not exposed to air, then it's okay.



What is the difference between DOT 3 and DOT 4?


Compared to DOT 3, DOT 4 brake fluid has higher wet and dry boiling points, which yields better performance and higher braking temperatures and in high performance applications. Although DOT four is becoming more popular, you're mainly going to see it in European nameplates.



What happens if you bleed brakes in the wrong order?


If you use the wrong sequence, you may never get all the air out of the brake system. Also check to see if you need to use a scan tool to facilitate bleeding. Sometimes it's required for a full bleed.



How to get air out of brake lines without bleeding them?


Step-by-Step Guide on How to Get Air Out of Brake Lines Without Bleeding

  1. Step 1: Safety Precautions.
  2. Step 2: Identify the Trapped Air.
  3. Step 3: Inspect the Brake Fluid Reservoir.
  4. Step 4: Manipulate the Brake Line.
  5. Step 5: Pump the Brake Pedal.
  6. Step 6: Pro Tip - Using a Bleeder Screw.
  7. Step 7: Recheck and Repeat if Necessary.



How to perform a brake fluid flush?


Flushing Brake Fluid

  1. On a level surface, set the car in gear and place a stop behind the tires to keep it from rolling.
  2. Open the hood and locate the master cylinder.
  3. Using a turkey baster, suck out all the fluid.
  4. Refill the reservoir back up to the fill line using fresh brake fluid.



What are the 3 S's of ABS braking?


This keeps your wheels from locking up while providing the greatest amount of braking possible. You are better able to steer your vehicle and maintain control. People often talk about the 3 S's of ABS: Stomp – Stay – Steer.



What is the bleeding control sequence?


Applying Direct Pressure to Control Bleeding
Place dressing on wound. Use a hemostatic dressing, if available. Apply steady, firm pressure directly over wound. Make sure the injured body part is on a firm, flat surface. Hold direct pressure until bleeding stops or a tourniquet is available.



What is the correct brake bleeding sequence?


Move systematically toward the driver – right rear, left rear, right front, left front - repeating the bleeding process at each corner. Be sure to keep a watchful eye on the brake fluid reservior! Keep it full!



Do you bleed brakes with cap on or off?


Locate your brake master cylinder reservoir's brake fluid level, usually located under-the-hood. Ensure that your car has the appropriate amount of fluid. While you're bleeding the brakes, you'll want to be sure that you leave the master cylinder cap unscrewed but rest it on top of the reservoir.



What is the order to bleed brakes with ABS?


The procedure looks like this:

  1. Manually bleed the system (Right Rear, Left Rear, Right Front, Left Front).
  2. Use the service tool to activate the ABS pump and cycle the valves.
  3. Bleed the system again using the same manual process.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.