Ford Focus Mk3 Transit Connect Overflow Bottle Hose Coolant Pipe BV61-8C012-AA

The Ford Focus Mk3 Transit Connect Expansion Tank Hose is a cooling system component designed for diesel-powered vehicles. It ensures a stable connection between the expansion tank and the rest of the system, supporting proper coolant circulation and safe engine operation.

Specifications and technical data

• SKU: BV61-8C012-AA
• Mark: Ford
• Condition: Used
• OEM Part Number: BV61-8C012-AA
• Substitutable numbers: BV61-8C012-AA, BV618C012AA, 1703510
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The expansion tank hose for Ford Focus Mk3 and Ford Transit Connect belongs to the Ford Cooling System Hoses and Pipes category. It is responsible for transporting coolant between the expansion tank and the rest of the system, which is crucial for maintaining a stable operating temperature for the diesel engine.

A correctly selected hose in this part of the system helps to:

• maintain the correct coolant level in the expansion tank,
• stabilize pressure in the cooling system during engine heating and cooling,
• reduce the risk of engine overheating in urban conditions and during long drives.

Benefits of Using an Original Ford Hose

This part comes from the vehicle manufacturer's line, meaning it was designed for specific Ford diesel models. Thanks to this:

• the geometry and diameters of the connectors are matched to the factory cooling system connections,
• the hose's rigidity and flexibility are selected for the thermal and pressure loads typical for these engines,
• routing in the engine bay minimizes the risk of rubbing against other components and causing leaks.

In practice, this translates to easier installation, predictable cooling system behavior, and fewer fitting issues often encountered with universal aftermarket parts.

Application in Diesel Engines

Cooling systems in diesel engines operate under relatively high thermal loads, especially in urban conditions and when driving with a load. The dedicated expansion tank hose for diesel engines is designed with consideration for:

• higher material durability in contact with coolant and additives,
• resistance to temperature changes across the engine's wide operating range,
• dimensional stability during long-term use.

This ensures the hose maintains its seal and proper flow cross-section, supporting even engine cooling and reducing the risk of overheating-related failures.

Condition, Installation, and Operation

The offered hose is part of the used Ford Cooling System Hoses and Pipes category, allowing for economical vehicle repair while maintaining original manufacturer specifications. Before installation, a standard inspection of the cooling system is recommended, including the condition of hose clamps, connectors, and the coolant level and quality.

When replacing the hose, pay attention to:

• correct routing in the engine bay, following the factory path,
• proper tightening of the clamps to ensure leak-free connections,
• bleeding the cooling system after completing the service work.

Related Ford Cooling System Hoses and Pipes

If you are looking for other items from the Ford Cooling System Hoses and Pipes category for your car, check out our dedicated offer: Ford Cooling System Hoses and Pipes. This will allow you to easily complete the remaining sections of your cooling system in one place.

More About Cooling System Operation

Do you want to better understand how high temperatures affect engine cooling efficiency and why the condition of hoses is important for engine safety? Check out our guide: Summer Heat vs. Cooling System – Used Radiators and Fans for Economical Operation. You will find practical tips on maintaining the entire cooling system, including selecting used components.