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How to Change a Garage Door Lock Barrel Without a Key

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

If you’ve lost your garage door key and can’t get a replacement, don’t worry! You can change the lock barrel without a key. Here’s how:

Tools Needed

Changing a garage door lock barrel without a key can be tricky, especially if you don’t have the right tools for the job. Luckily, there are a few tools that you can use to make the process a lot easier. In this section, we’ll go over what tools you need to successfully change a garage door lock barrel without a key.


A screwdriver is a tool that is essential to many household maintenance projects. When it comes to changing out a garage door lock barrel without a key, having the right type of screwdriver on hand can make the job much easier.

Before you attempt any repair work, check to see if the same style of screwdriver is already in your toolbox. The best type of screwdriver for this particular task may be either a flat-head or Phillips-head, however some models may require other specialized types such as Torx or triangular. Make sure you have the correct size for your lock barrel screws, as using incorrect sizing can strip and damage the screws.

If necessary, purchase a new screwdriver set that includes multiple sizes and head types. Quality screwdrivers are well worth their cost in time saved and prevention of further damage from using inferior tools. Another handy item to have on hand when tackling this project is an adjustable wrench for turning any nuts that secure the lock barrel within its frame.

Adjustable wrench

Changing a garage door lock barrel without a key requires several tools, the most important of which is an adjustable wrench. This type of wrench is designed to open up a range of sizes, including nuts and bolts, making it ideal for tinkering and repairing locks. To remove the old lock cylinder, you will need the adjustable wrench to unscrew the Retaining Screw from the rear of the lock. Make sure you pay attention when loosening it so that you can tighten it back up in the same direction. Once the Retaining Screw has been removed, you can slide out the old Lock Barrel and replace it with your new one.

Lock barrel

Replacing a lock barrel on a garage door is a relatively straightforward task for someone proficient with basic household tools. Before Breaking Open the door, gather the necessary materials and tools, which include:
-A screwdriver
-The new lock barrel
-A ruler or measuring tape
-Pliers or wire cutters
-Plastic rivets (if the door panel requires them)
-Drill, drill bits and countersink bit (if switching from a single cylinder to double cylinder lock).

Measure the diameter of the existing lock barrel with a ruler or measuring tape to ensure that the new one fits into the same space. Unscrew the bolts holding the existing lock barrel in place; pliers may be needed if they are stuck too tightly. If metal rivets are present instead of bolts, remove them with wire cutters. Depending on how many holes will be necessary for installation, additional drill bits or countersink bit may be required. Finally, insert and secure your new lock barrel following instructions provided with your purchase.

Removing the Old Lock Barrel

Replacing your garage door lock barrel without a key is a relatively simple process. You will however need to have access to some basic tools to get the job done. To begin, you’ll need to remove the old lock barrel. This can be done by using a flathead screwdriver to release the springs that hold the lock barrel in place. Once the springs are released, you can then unscrew the old lock barrel and remove it from the door.

Remove the screws holding the lock barrel in place

Once you have removed the plastic covers from both sides of the garage door, locate the screws on each side that are holding the lock barrel in place. You will typically be able to see these screws and may need to remove dirt, debris or paint in order to spot them. Using your screwdriver, remove all of the screws carefully so as not to damage threads or strip any heads. Carefully slide the lock barrel out from its bracket. Depending on your specific garage door and lock, it may be necessary to unscrew an access faceplate to access all necessary screws. Once you have removed all of the retaining screws, you should be able to safely slide out your old lock barrel.

Unscrew the bolt at the back of the lock barrel

To remove the old lock barrel, locate the bolt that holds it in place at the back of the lock barrel. This is usually a small Phillips or flathead screw and is often located directly behind the keyhole. Use a screwdriver to remove the screw and pull out any locking washers or pins along with it. Once you have removed these components, you can then slide out the entire lock barrel from its housing. Be careful as some lock barrels may be held in by more than one bolt and/or come apart in two pieces. If this is the case with your garage door, carefully take out all necessary parts before discarding it completely.

Pull the lock barrel out

In order to Cut the Key and remove the old lock barrel without it, you will need to pull the lock barrel out of the hole in the garage door. To do this, take a pair of pliers and firmly grip the small circular part at the end of the lock barrel, which is called its tailpiece. Pull firmly on the tailpiece until it comes out from the door, then slip it off easily from your hand. Be careful not to scratch or damage the surface of your garage door as you Cut the Key and manipulate it. Then remove any additional screws that may be in place on your existing lock barrels so you are free of any barriers that may stop them from being taken out.

Installing the New Lock Barrel

Replacing a garage door lock barrel without a key can be a tricky process. However, it is possible to do it safely and securely as long as you have the right tools. In this section, we will discuss the steps required to install a new lock barrel without a key. This will include removing the old lock barrel, installing the new lock barrel, and securing the new lock barrel. Let’s get started!

Insert the new lock barrel

Now that you have your new lock barrel, it’s time to install it. Make sure the door is locked and open, then insert the new lock barrel in the same way as the old one was removed. Ensure that all of its pieces fit securely and smoothly in place. Depending on your model, use either a flat-head or Phillips screwdriver to tighten any screws that need to be tightened. You should then test that your lock functions correctly by closing and locking the door several times. It is also a good idea to check that there is no debris left on or around the door after installation which could affect it from opening or closing properly.

Secure the new lock barrel with the screws

Once the new lock barrel is inserted into the door, it will need to be securely held in place with the screws that come with it. Using a screwdriver, tighten the screws until they are snug and secure – but be careful not to over-tighten them and strip the threading. Properly placed and tightened screws will ensure that your new lock barrel works effectively and lasts for years to come.

Tighten the bolt at the back of the lock barrel

Now that you have the new lock barrel in place, it is time to tighten the back to make sure that there is no movement in the lock. You can do this by taking a screwdriver and turning the hexagonal bolt located at the back of the lock barrel clockwise until it’s fully tightened. Make sure you test to make sure that there are no parts of your garage door that are shaken due to a weak connection.

Finishing Up

Congratulations on changing your garage door lock barrel without a key! Maybe you lost the original key or it just stopped working. Whatever the reason, you have now successfully installed a new garage door lock barrel on your own. Now you can enjoy the peace of mind that comes with knowing that your garage is more secure from intruders. Let’s go over the important steps to finish up this project.

Test the lock barrel to make sure it works properly

Once you’ve replaced the old lock barrel or fitted a new one, it’s finally time to check that the lock works. Take the key handle and try to insert it into the keyhole. You can also unlock and lock the door using the Wing Lock feature if your garage door is equipped with one. Next, test out the full range of movements available on your handle – up, down, left and right. If all of these tests are successful then you should have no problem getting into your garage in future by using your new key! Finally, you should also make sure to visually inspect both external and internal components of your garage door lock before operation to be certain they are all securely fastened together and free from any loose parts or debris which could prevent them from working properly.

Replace the cover plate

Finally, you need to replace the cover plate that previously housed the old lock barrel. To do this, locate the screws on the cover plate and insert them into their holes. Some cover plates only have two screws while others require four. Tighten the screws securely using a screwdriver to ensure that the cover plate is firmly in place.

Now that you have changed your garage door lock barrel without a key, you can test it out by manually locking and unlocking your garage door. You should find it works perfectly!

Test the lock again to make sure it is working properly

Before leaving the garage, test the new lock a few times to make sure it is working properly. This can be done from either inside or outside the garage. Open and close the door using the new key and make sure it turns smoothly with no noticeable resistance in its operation. If you encounter difficulties, try locking and unlocking it a few times using both sides of the complex barrel mechanism. If this does not work, you may need to deactivate the lock before installing a new one. Once you are sure that everything is operating as it should, you can be confident that your garage door is secured against unauthorized access.

How to Change a Garage Door Lock Barrel Without a KeyCheckout this video:

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