How To Plug Brake Line When Changing Caliper- Let’s Find Out! 

You might think changing caliper, plugging brake lines, and bleeding brake fluid can be a hassle. But that’s not true. Knowing a few simple and effective methods can be very easy. 

So, exactly how to plug brake line when changing caliper?

You can plug brake line when changing caliper in three easy steps. Firstly, you need to depress the brake pedal. Secondly, you need to change the brake fluid. Finally, you need to clam the hose of the brake line. 

Now, let’s dive into the main part and learn the methods in detail. 

Is It Possible To Plug Brake Line When Changing Caliper? 

If you find your brakes not working after a brake job, chances are high that the brake line needs plugging. No need to worry anymore because the answer is yes! It is very much possible to plug the brake line when changing the caliper. 

But those are effective if your car is functioning appropriately. But what if your vehicle is all rusty and blown? Well, you can take a temporary approach initially. You have to take a screw out from the rear brake line. 

Then remove the rated outline and place it again. But this will not be a stable solution. You have to replace those. For that, the methods mentioned below will do wonders. 

There are multiple methods that you can follow for that. Though you may have to choose the method depending on your situation sometimes.

Here we have discussed 3 effective and easy methods that can fix the problem. Make sure to maintain precaution as steering wheel fluid can mess up brakes.

So, How Can You Plug Brake Line When Changing Calipers?

Well, It is not as difficult as it sounds. In fact, as we mentioned already, with minimum tools, and simple methods, you can fix it. You won’t have to spend extra bucks on it! 

Before discussing the method, it’s better to know how calipers connect with the brake system. Calipers are assembled inside wheels. Those are connected to the master cylinder through the tubes. There, the calipers fit like a clamp.

Now, you might be wondering how to temporarily plug a brake line for immediate use. You can temporarily plug a brake line by cutting the line, flattening it and then folding it twice. Finally clamp it with vice grips to prevent future damage. 

Inside each caliper, there are brake pads. These stop the wheels upon pressing the brake. Brake fluid creates pressure on pistons in the caliper. This forces the brake pads to the brake rotor and then gradually stops the car. 

Here are 3 methods to help you with it! 

Method 1: Depressing The Brake Pedal 

Plugging the brake line by depressing the brake pedal is a foolproof way to get the job done. You don’t want to lose fluid while removing brake line from caliper.


Here are some of the tools you’ll be needing for this:


To plug the brake line in this way- 

  •  You have to push the brake pedal down. 
  • You can do that with your foot. You get a short length of the line. 
  • Then while removing the caliper, you must screw it onto the line. 
  • After that, you must roll it and pinch shut with vice grips. 

Doing this allows you to easily plug the brake line when changing the caliper. And all you need are two very basic pieces of equipment. These are very easy to find in any shop. Most likely you already have these at your home.

Method 2: Changing Brake Fluid

Hydraulic brake systems need to bleed and get refilled. This prevents moisture. So, you need to change the brake fluid. Getting a brake line block off plug might help in this situation.


The tools you’ll be needing for this method are:


To do that, 

  • you need to suck the majority of the fluid from the master cylinder. 
  • A pump or a kitchen utensil can help with that too. Then change the caliper. 
  • While doing it, make sure the circuit doesn’t get in contact with air. 

Now, changing brake fluid at least once a year is mandatory. This helps in improving your car’s performance. This is why we suggest Method 2. This method already involves changing the brake fluid, thus serving two purposes. 

It’s also the fastest method. You just need a pan and let the fluid run into that. Use the gloves and rubber band as mentioned in the method. You can use a vacuum cup as well. 

The process is completely risk-free. However, it’s important to stay focused and careful while doing this. Otherwise, it will come in contact with air and moisture. This will affect your object. 

Method 3: Clamping The Hose 

A clamping brake hose is necessary. This prevents the risk of old and dirty fluid from going back to the system. This can lead to problems like the brake pedal and brake pull. 

But a simple solution can save all these hassles. You can solve this by pushing the piston in advance to clamping off your brake hose. You need a brake line plug kit for this.


The required tools are:


  • Turn the screw anti-clockwise to expand the hose clamp. It should be large enough to slide over the hose. 
  • Then side the hose clamp over the hose. 
  • Slide the hose over the fitting you need to attach. 
  • Slide those hose clamps over the joint between that fitting and it. 
  • Then turn the screw clockwise and create the required tension to contract the hose clamp around that hose. 

By following this method, you’ll get the job done very easily. For that, all you need is just one tool. It doesn’t take long and it’s very easy! 


How Long Do Rubber Brake Lines Last?

Rubber brakes last 6 years on average. With stainless steel, it can be 5 to 10 or more. 

How Do You Stop a Brake Line When Changing the Caliper? 

To stop a brake line loosen and tighten the brake hose with a line wrench. After that, loosen and remove the caliper. 

How Tight Should Brake Line Fittings Be? 

 Line fittings need to be finger-tight. Keep tightening till it feels drawn down tight.

Can Steering Fluid Mess Up Your Brake?

In some cases, steering fluid can actually damage your brake. However, it takes the steering wheel fluid some time to mess the brake up. Still, the steering wheel damaging your brake is a common issue. 


That’s all on how to plug a brake line when changing caliper. Make sure to look after the fitting. It shouldn’t be too loose or too tight. 

Taking good care of the tools is necessary if you wanna stay unbothered for years. 

So, grab the tools and easily plug the brake line while changing the caliper next time!

Robert Lozano

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