BMW F20 F30 Coolant Hose Expansion Tank Cylinder Head Pipe B47 Diesel 8514454

The BMW F20 F30 Coolant Hose Expansion Tank Cylinder Head Pipe B47 Diesel is an original cooling system component designed for BMW F-series diesel engines with the B47 unit. Thanks to its factory-matched connection geometry and fit to the cooling system routing in the engine bay, the hose ensures stable coolant flow between the expansion tank and the cylinder head, supporting the safe operation of the powertrain.

Specifications and technical data

• SKU: 8514454-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8514454
• Substitutable numbers: 11538514454, 8514454
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Function in the Cooling System

The presented hose belongs to the BMW Coolant Hoses and Pipes category and is specifically designed for B47 diesel engines installed in BMW F-series vehicles, such as the F20 and F30. It is responsible for the controlled transport of coolant between the expansion tank and the cylinder head, which is crucial for:

• maintaining correct pressure in the cooling system,
• bleeding the circuit in the cylinder head area,
• stabilizing the engine's operating temperature,
• protecting against overheating under heavy load conditions.

Thanks to its appropriately selected cross-section and shape, the hose works with factory-made spigots and clamps, facilitating installation and reducing the risk of leaks.

Construction and Fit for the B47 Diesel Engine

The component has been constructed with the specific routing of the cooling system in BMW engines with the B47 unit in mind. The appropriately shaped pipe allows for:

• unobstructed routing of the hose relative to engine accessories,
• maintaining the correct bending radius, which reduces the risk of kinks and flow restriction,
• secure seating on the spigots of the expansion tank and cylinder head.

This precise fit translates to stable cooling system operation and reduces the risk of coolant leaks at critical connection points.

Benefits of Using an Original BMW Hose

Using an original hose to replace a worn or leaking component allows for the restoration of factory cooling system performance. In practice, this means:

• more predictable engine temperature behavior in urban and highway driving,
• a lower risk of engine overheating failures,
• better compatibility with other cooling system components, such as the radiator, thermostat, and water pump.

This solution is particularly recommended for diesel engine servicing, where stable cylinder head cooling directly impacts engine durability and operational safety.

Condition, Service Application, and Installation

The hose is a used part, making it an attractive option for budget-conscious repairs or for restoring the cooling system's functionality in intensively used vehicles. It serves well as a replacement part for a damaged existing hose or during more extensive engine service work when a preventative replacement of critical cooling system sections is recommended.

Thanks to the preservation of the original shape and connection diameters, installation is similar to BMW service procedures – after proper seating and securing with clamps, the system can be quickly bled and leak tested.

Technical Support and Additional Materials

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as additional pipes, flexible hoses, or return pipes, check the available parts in the BMW Coolant Hoses and Pipes category.

To better understand how operating conditions affect cooling system durability and when it's worth considering replacing hoses, radiators, and fans with used parts, consult the guide Summer Heat vs. Cooling System: Used Radiators and Fans for Savings, which provides practical tips for safe operation and servicing of vehicle cooling systems.