What Size Are Subaru Bleeder Screws?

Owners of Subaru vehicles may need to know the size of the bleeder screw for their brake calipers. This is important when replacing brake fluid or performing other maintenance. The size of the bleeder screw can vary depending on the model and year of the Subaru, with some models having different-sized screws for the front and rear calipers. For example, the 2002 Impreza WRX has M7x1.0 threads on the bleeder screw, while later models may have both M10x1.0 and M7x1.0. Knowing the correct size is essential to ensure the proper functioning of the brake system.

Speed Bleeder Screw Sizes

Speed Bleeder offers a range of bleeder screw sizes for various vehicle applications. The correct Speed Bleeder screw size for a vehicle depends on the specific brake caliper and the make and model of the car.

For Subaru vehicles, the bleeder screw size can vary depending on the model year and the specific brake caliper. According to a thread on the NASIOC (North American Subaru Impreza Owners Club) forum, the bleeder screw size for Subaru vehicles is typically either 7mm, 8mm, or 10mm. More specifically, it was mentioned that the WRX 2-pot calipers and Subaru 4-pot calipers use a 7mm bleeder screw, while all other Subarus use a 10mm bleeder screw. Another user added that Imprezas up to 08/96 and all Legacy Turbo calipers use a 10mm bleeder screw, while Imprezas from 09/96 onwards use a 7mm bleeder screw.

On the other hand, a Subaru Forester Owners Forum thread mentioned that the front bleeder valves on their Subaru Forester are 10mm, while the rear valves are 8mm.

Speed Bleeder offers a comprehensive selection of bleeder screw sizes for both automobiles and motorcycles. They provide over 15 different sizes to ensure compatibility with various vehicle types and models. The Speed Bleeder screws are designed to be installed once and become a permanent part of the brake system. The installation process is straightforward, and the screws are made of quality materials, offering a cost-effective and time-saving solution for brake bleeding.

Front and Rear Bleeder Valve Sizes

The bleeder valve sizes for your Subaru vary depending on the model and year. Here is a detailed breakdown:

Subaru Impreza WRX

For the Subaru Impreza WRX, the bleeder valve sizes differ between the front and rear brakes. The front bleeder valves typically use a 10mm bolt, while the rear valves use an 8mm bolt. Specifically, for the 2002 WRX, the front bleeder valves are M10x1.0, and the rear valves are M7x1.0. However, some later models of the WRX have both M10x1.0 and M7x1.0 valves, so it is essential to measure or check the specific model's requirements.

Subaru BRZ

For the 2020 Subaru BRZ, the recommended bleeder screw size is M10 x 1.0 for both the front and rear brakes. This information was confirmed by checking the stock bleeder screw part number (26239AA011) on the official Subaru parts website, which fits a range of Subaru vehicles.

Other Subaru Models

For other Subaru models, the bleeder valve sizes can vary. For example, the 2006 Subaru Forester has 10mm front valves and 8mm rear valves. It is recommended to refer to specific model forums or consult with mechanics or official dealerships for precise information regarding your Subaru model and year.

Speed Bleeders

If you are considering installing speed bleeders, which offer a more convenient one-person brake bleeding operation, the required part numbers are SB1010 or SB1010-SS (stainless steel) for the Subaru BRZ. For the 2002 WRX, the recommended speed bleeders are SB7100 for the rear and SB1010 for the front.

OEM 4-pot bleeders

The OEM 4-pot bleeders on a Subaru refer to the brake calipers, which are a type of braking system that uses hydraulic pressure to press the brake pads against the rotor and slow down the vehicle. The bleeder valves on these calipers are an important part of the braking system, as they allow for the release of air that has entered the brake lines, which can affect the performance and feel of the brakes.

The size of the bleeder screw on the OEM 4-pot calipers varies depending on the model and year of the Subaru. For example, some models such as the 2002 Impreza WRX and the WRX STI are known to have M7x1.0 thread bleeders, while later models may have both M10x1.0 and M7x1.0. The M10x1.0 is identifiable by the fact that it is operated with a 10mm wrench, while the M7x1.0 will be operated with an 8mm wrench. It is important to get the correct size, as using the wrong size can damage the threads and cause a leak.

To confirm the correct size for your specific Subaru model and year, it is recommended to refer to the factory service manual or contact a Subaru dealer or mechanic. Additionally, there are online resources and communities dedicated to Subarus, where owners and enthusiasts share their knowledge and experiences, which can be a valuable source of information.

When replacing or working on the bleeder valves, it is important to follow the correct procedures to avoid damaging the braking system, which is a critical safety component of your vehicle. It is always recommended to have a qualified mechanic perform any work on your braking system if you are unsure about the procedure or the correct parts to use.

In conclusion, the OEM 4-pot bleeders on a Subaru refer to the brake calipers, and the size of the bleeder screw can vary depending on the model and year of the vehicle. It is important to confirm the correct size before performing any work on the braking system, and to follow the proper procedures to ensure the safety and performance of your vehicle.

2-pot caliper bleeders

The 2-pot calipers on a Subaru have a 10mm bolt and use a 7mm bleeder screw, which refers to the size of the threaded body and not the hex head. This is the same size as the bleeder screw for all other Subaru calipers except for the 4-pot calipers, which use an 8mm bolt.

When purchasing replacement bleeder screws, it is important to ensure that you are buying the correct size for your specific Subaru model and year. For example, the 2022 Toyota GR 86 and Subaru BRZ models use an M10 x 1.0 bleeder screw, while some earlier WRX models use M7x1.0.

It is also worth noting that there may be variations in bleeder screw sizes within the same model year, so it is always best to consult a mechanic or a Subaru-specific forum to confirm the exact size you need.

One way to identify the correct bleeder screw size for your Subaru is to measure the size of the wrench that fits the screw. If a 10mm wrench fits, then you need an M10x1.0 bleeder screw. If the 10mm wrench is too big, then the correct size is likely M7x1.0.

Additionally, some aftermarket companies that sell bleeder screws, such as SpeedBleeder, provide online charts or model numbers to help you identify the correct size for your vehicle.

Speed Bleeder Check Valve

The Speed Bleeder is a patented bleeder screw with a built-in check valve that can be used for Subarus. It is designed to be a one-person device, simplifying the process of bleeding brakes. Once installed, it becomes a permanent part of the brake system.

To use the Speed Bleeder, loosen the screw by a quarter to half a turn and pump the brake pedal. The pressure generated will open the check valve, allowing air and brake fluid to escape through the end of the Speed Bleeder. When you release the pedal, the check valve closes automatically, preventing air from re-entering the system. You will know it is time to close the Speed Bleeder when you see bubble-free fluid. Closing the Speed Bleeder will prevent any brake fluid from leaking out, just like the stock bleeder screw. Typically, it takes about five pumps to purge each caliper or wheel cylinder.

The Speed Bleeder is made from quality materials and is designed to be economical. It is available in both standard and stainless steel options. The standard option is priced at $7 each, while the stainless steel option is priced at $15 each.

For Subaru owners, it is important to note that the bleeder valve sizes may vary depending on the model and year of your vehicle. For example, one source mentions that the front bleeder valves on their Subaru Forester are 10mm, while the rear valves are 8mm. Another source mentions that the WRX 2-pot calipers and Subaru 4-pot calipers use a 7mm bleeder screw, while all other Subarus use a 10mm bleeder screw. It is always a good idea to confirm the correct size for your specific Subaru model before purchasing or installing any parts.

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