BMW E90 E91 LCI E92 Engine Camshafts Cylinder Head N57 Diesel 8575439 8575440

BMW E90 LCI E92 N57 Diesel Camshaft Cylinder Head 8575439 8575440 is a complete set of timing components within the cylinder head designed for BMW N57 diesel engines. Using an original cylinder head with camshafts ensures proper valve timing geometry, stable engine operation, and predictable performance parameters. This solution is for users seeking factory compatibility and a reliable base for engine repair in E90 LCI and E92 diesel models.

Specifications and technical data

• SKU: 8575439-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8575439
• Substitutable numbers: 8575439, 11318575439, 8509120, 11318509120, 7800045, 11317800045, 7823929, 11317823929, 8575440, 11318575440
• Fuel type: Diesel
• Part type: Cylinder Head
• Category: Cylinder Heads

Intended Use and Compatibility with N57 Diesel Engines

The presented cylinder head with camshafts is designed to work with the N57 Diesel engine, used in BMW 3 Series E90 LCI and E92 models. The construction is adapted to the characteristics of this diesel unit, where precise valve control under high boost and injection pressures is crucial. Using an original cylinder head assembly allows for maintaining correct timing phases, which translates to smooth idling, proper dynamics, and stable diesel fuel combustion.

Cylinder Head and Camshaft Assembly Construction

The engine cylinder head in this set serves as the base for the timing system, housing the camshafts responsible for opening and closing the valves. The arrangement of bearing journals, oil passages, and valve seats conforms to the factory BMW specification, facilitating installation on the N57 engine block. The camshafts work with the valve mechanism in a way that ensures proper synchronization with the crankshaft, which is particularly important in modern diesel engines with advanced electronic control.

By maintaining the original cam geometry, it is possible to preserve the correct valve lift and duration, which affects the efficiency of cylinder filling and the smooth evacuation of exhaust gases. This setup is beneficial for both daily driving and situations of higher load, typical for diesel engines in premium mid-size cars.

Practical Application in Service

A complete cylinder head with camshafts is particularly useful for major engine repairs, such as mechanical damage to the timing system, engine overheating, or wear of valve control components. Using a ready-made assembly can shorten workshop time, reduce the risk of installation errors, and simplify parameter checks after engine reassembly.

In service practice, such a set is ideal as a complete base for rebuilding the upper part of the engine, especially when maintaining compliance with the factory BMW specification is important. For the user, this means greater predictability of engine operation, and for the workshop, simpler planning of the repair scope and labor costs.

Used Product Characteristics

This component comes from the Cylinder Heads category and is offered as a used part, allowing for economical repair while maintaining the original BMW design. A used cylinder head with camshafts is a good solution when a new component would be economically unfeasible, and at the same time, maintaining the factory design and compatibility with engine accessories is desired.

Before installation, the standard workshop procedure is recommended: verifying the flatness of the mating surface, checking the condition of the valve seats, and assessing the clearances within the camshafts. This approach allows for preparing the assembly for further operation under the demanding conditions of a diesel engine.

Support in Selection and Additional Information

Due to the specific nature of BMW diesel engines and differences between model versions, when selecting a cylinder head with camshafts, it is advisable to verify compatibility with the specific engine configuration and vehicle year. Vehicle identification data and information about the diesel fuel system used are helpful here.

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 complete cylinder heads, mounting components, or additional upper engine components, check the available parts in the BMW Cylinder Heads category.

For drivers interested in a broader approach to modifying and operating Mini cars, including aspects of legal modifications and selecting used components, the article may be helpful: Used Mini John Cooper Works Pro Sport Exhaust – A Legal Way to Get a Sporty Sound and +7 HP.