Cylinder Head Hose BMW G01 G02 40dX 30dX B57 Radiator Pipe Line Diesel 8577056

Cylinder Head Hose BMW G01 G02 40dX 30dX B57 Radiator Pipe Line Diesel is a cooling system component designed for BMW G01/G02 series models with 30dX and 40dX units. This used, original hose/pipe connecting the cylinder head to the radiator ensures stable coolant flow and helps maintain safe thermal operating conditions for the diesel engine, which directly impacts the durability of the powertrain.

Specifications and technical data

• SKU: 8577056
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577056
• Substitutable numbers: 8577056, 17128577056
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Application and function in the cooling system

The described hose belongs to the Lines, hoses and pipes group and operates in the area of the cylinder head and radiator, transporting coolant in the BMW diesel engine. A correctly selected component in this location is crucial for:

• maintaining a stable operating temperature of the powertrain,
• preventing local overheating in the cylinder head area,
• maintaining the tightness of the cooling system under load,
• proper cooperation with other radiator hoses and connectors.

Thanks to a design tailored to the specific architecture of the B57 diesel engine in xDrive versions, the hose maintains the correct routing geometry, which reduces the risk of chafing, kinking, and unwanted stress during engine operation.

Compatibility with BMW diesel units

The cylinder head hose has been designed to work with Diesel engines in modern BMW G01 and G02 models with xDrive. This means that its diameters, length, and shape are adapted to the factory layout of components in the engine bay, which facilitates installation and ensures proper coolant flow.

Selecting a hose dedicated to a specific family of diesel engines allows for maintaining factory cooling parameters, thereby supporting stable powertrain operation under load, both in daily use and during dynamic highway driving.

Component characteristics and benefits of use

As an original BMW part, the cylinder head hose is made of materials selected for operation at high temperatures and under pressure typical for diesel engine cooling systems. The hose design takes into account:

• resistance to temperature and pressure changes during long-term operation,
• compatibility with factory clamps and connectors,
• precise fit to the cylinder head and radiator ports,
• maintaining appropriate rigidity while ensuring installation flexibility.

Choosing a used, original hose from this group allows for maintaining the consistency of the entire cooling system, while also providing an economical solution for repairing or replacing a damaged component. This is particularly important in modern diesel units, where stable cooling affects the lifespan of the turbocharger, seals, and cylinder head.

Condition, installation, and practical aspects

The item is offered as a used part, which allows for cost-effective restoration of the cooling system's efficiency while maintaining the original BMW specification. The hose is intended for installation in place of the factory equivalent, so service work is limited to removing the old component and installing the new hose or pipe while following standard cooling system bleeding procedures.

In practice, this means that with proper installation and the use of appropriate clamps, you can achieve a tight and stable connection without the need to modify other components in the engine bay. This solution is particularly beneficial for users who want to keep their car in a configuration close to the factory one.

Cooling system upgrade expansion

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

For owners of older BMWs or other premium brands who want to consciously use used components while maintaining high vehicle functionality, it is worth checking out the guide: The second life of a youngtimer – how used car parts rejuvenate cars from 1998–2012.