Sti Crossover Pipe: Screw Size Guide

The Subaru Impreza WRX STi TURBO Forester Outback Impreza Water Transfer Crossover Pipe O-Ring is a crucial component for Subaru owners looking to maintain their vehicle's performance. This pipe is responsible for transferring coolant across the cylinder block, and leaks onto the engine block are not uncommon. Genuine Subaru O-rings and bolt kits are available for purchase, ensuring an easy and inexpensive fix for owners experiencing leaks. It's important to note that some kits may include bulk bags of O-rings without individual part numbers, but these are still genuine Subaru replacements. When replacing the water transfer crossover pipe, it's recommended to seek professional advice or refer to a qualified technician to ensure correct installation.

O-rings and bolts

The O-rings and bolts are essential components of the Subaru STI water transfer crossover pipe. This pipe is made of aluminium and is responsible for transferring coolant across the cylinder block, underneath the inlet manifold.

The O-rings create a seal to prevent coolant leaks, which are not uncommon in this part. The O-rings are sold in sets of two, with the part number 806933010. They are compatible with a range of Subaru models, including the Impreza WRX STi, Forester, Outback, Baja, BRZ, Crosstrek, Legacy, and WRX, spanning model years 1993 to 2019.

The bolts, on the other hand, are used to secure the pipe in place. While the specific bolt size is not mentioned, the water transfer crossover pipe kit includes four mounting bolts, two O-rings, and the coolant crossover pipe itself. This kit is compatible with the 2006-2007 Subaru WRX and the 2006-2021 WRX STI.

It is recommended to use genuine Subaru replacement parts to ensure quality and compatibility.

Compatibility with Subaru models

The water transfer crossover pipe is compatible with a range of Subaru models, including:

• 2003-2006 Subaru Baja
• 2013-2019 Subaru BRZ
• 2013-2019 Subaru Crosstrek
• 1998-2019 Subaru Forester
• 1993-2019 Subaru Impreza
• 2002-2019 Subaru WRX
• 2004-2019 Subaru WRX STI
• 1990-2019 Subaru Legacy
• 2000-2019 Subaru Outback
• 2006-2007 Subaru WRX
• 2006-2021 Subaru WRX STI

The water transfer crossover pipe is an important component of the cooling system in Subaru vehicles. It is made of aluminium and is responsible for transferring coolant across the cylinder block, underneath the inlet manifold.

The compatibility of the water transfer crossover pipe varies depending on the specific model and year of the Subaru vehicle. For example, the 2006-2007 WRX and 2006-2021 WRX STI models require a specific kit that includes the coolant crossover pipe, mounting bolts, and O-rings.

It is important to note that some models may have variations or specific requirements for the water transfer crossover pipe, so it is always recommended to consult a trusted mechanic or refer to the specific model's service manual for accurate information.

Additionally, when replacing the water transfer crossover pipe, it is important to consider the quality of the replacement parts. Genuine Subaru replacement parts are recommended to ensure optimal performance and longevity.

Hose attachment

The hose attachment for the Subaru STI water transfer crossover pipe is an important component of the cooling system. The process of attaching the hose to the crossover pipe ensures a secure connection between the hose and the pipe, preventing leaks and maintaining optimal cooling performance.

To attach the hose to the water transfer crossover pipe, it is essential to have the correct hose size and type. The hose should be compatible with the specific Subaru model and year. For example, the Subaru Coolant Crossover to Water Pump Hose is designed for the 2002-2007 WRX and STI models. It attaches to the X-Over tube and connects to the water pump, ensuring a proper coolant flow.

When attaching the hose, it is crucial to follow the manufacturer's instructions and torque specifications. The hose should be securely clamped or fastened to the crossover pipe to prevent leaks and ensure a tight seal. This may involve using specific types of clamps or hose fittings designed for the Subaru STI.

In some cases, additional components may be required for the hose attachment. For instance, the Subaru PCV Crossover Soft Hose Kit for the 2006-2007 WRX and 2004-2007 STI models includes soft rubber line assemblies that connect to the hard crossover pipe. The kit provides the necessary hoses and clamps for a secure and proper installation.

It is always recommended to refer to the Subaru service manual or seek assistance from a qualified technician when attaching the hose to the water transfer crossover pipe. This ensures that the job is done correctly and safely, maintaining the integrity of the cooling system and preventing potential leaks or damage.

Weight and category

When it comes to the weight and category of the water transfer crossover pipe and screw kits for Subaru vehicles, there are a few different options to consider. The weight of these kits can vary depending on the specific vehicle model and the number of components included.

For example, the water transfer crossover pipe O-ring and bolt kit for the Subaru Impreza WRX STi, which includes two O-rings, has a shipping weight of 0.63 ounces, or 18 grams. This kit falls under the category of "Automotive Replacement Transmission Seals & O-Rings".

On the other hand, a similar kit, the water transfer crossover pipe O-ring and bolt kit for the Subaru V1 and V2, is listed on eBay with a shipping weight of 12.0 pounds, or 5.44 kilograms. This kit includes four mounting bolts and two O-rings, and falls under the category of "Water Transfer Pump Trash & Water Transfer Pumps".

Another option is the Subaru OEM Water Pipe Kit for the 2006-2007 WRX and 2006-2021 STI models. This kit has a shipping weight of 12.0 pounds and includes the coolant crossover pipe, four mounting bolts, and two O-rings. The category for this kit is listed as "Cooling System".

Additionally, the Subaru Coolant Crossover to Water Pump Hose for the 2002-2007 WRX and STI models has a shipping weight of 0.5 pounds and falls under the category of "Engine Maintenance". This kit does not specify the number of screws or bolts included.

It is important to note that the weights provided are for shipping purposes and may include the packaging weight as well. The actual weight of the kits may vary slightly, but these values can still give a good estimate of the overall weight of each option.

Seller information

This product is sold by Advanced Automotive Performance Ltd, a business seller located in Bristol, United Kingdom. The seller provides an email address, enquiries@advancedautomotives.com, for customer enquiries.

Advanced Automotive Performance Ltd provides clear terms and conditions for sales, including information regarding product suitability and installation, delivery, and returns. The seller emphasizes that customers should ensure product suitability for their vehicles prior to ordering and recommends seeking professional advice from qualified technicians if needed.

The seller also notes that due to the COVID-19 pandemic, deliveries may be subject to delays, and they recommend choosing the Royal Mail special guaranteed service for speedier delivery. International shipping is currently unavailable due to COVID-related problems and long delays.

The seller has a 99.8% positive feedback rating on eBay, with buyers commenting on the swift response and quick delivery.

In addition to the Water Transfer Crossover Pipe O-Ring & Bolt Kit for Subaru, Advanced Automotive Performance Ltd offers a range of car parts and accessories for various vehicle brands, including Alfa Romeo, Audi, BMW, and Citroen.

Frequently asked questions