BMW 1 3 Series F20 F21 F30 F31 LCI Petrol B38 B38A15A Engine Cylinder Head

BMW 1 3 Series F20 F21 F30 F31 LCI Petrol B38 B38A15A Engine Cylinder Head is an original component from the Cylinder Heads group, designed for modern BMW three-cylinder petrol engines. This used OEM part ensures factory-standard fitment to the powertrain, facilitating professional repair or replacement in facelift (LCI) models. It is an ideal solution for workshops and users seeking a proven, technically advanced base for engine overhauls.

Specifications and technical data

• SKU: 2118965
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2118965
• Substitutable numbers: 11122118965, 2118965, ŁS
• Fuel type: Petrol
• Category: Cylinder Heads

Application and compatibility with the B38 engine

The presented cylinder head is designed for the B38 B38A15A petrol engine installed in facelifted BMW 1 Series F20/F21 and 3 Series F30/F31 models. The design of this unit is based on three cylinders and direct fuel injection, which is why a properly selected cylinder head is crucial for combustion chamber sealing, stable valve operation, and correct heat dissipation.

The original origin of the component allows for maintaining compatibility with factory specifications for the timing system, intake and exhaust ports, and the cooling system. Consequently, the cylinder head serves as a solid base for further machining, regeneration, or assembly of accessories in accordance with the manufacturer's requirements.

Construction and function of the engine cylinder head

The engine cylinder head in this configuration is responsible for valve operation, forming the combustion chambers, and distributing coolant and oil in the upper part of the power unit. In the B38 B38A15A engine, the precision of the ports and valve seats has a direct impact on:

• stable compression pressure in each cylinder,
• efficient filling and emptying of the combustion chambers,
• maintaining the proper engine operating temperature,
• reducing mechanical and acoustic losses.

Thanks to the factory geometry of the intake and exhaust ports, the cylinder head helps maintain the power and torque characteristics intended for this unit, which is important both in daily operation and after potential software tuning.

Benefits of using an original used cylinder head

Using an original, used cylinder head for the B38 B38A15A engine allows for reduced repair costs while maintaining high compliance with factory specifications. This type of component is particularly useful in situations where overheating, mechanical damage, or casting cracks have occurred and the entire cylinder head body needs to be replaced.

The main advantages of such a solution include:

• factory fitment to the engine block and accessories,
• possibility of further machining (resurfacing, regeneration of seats and guides),
• preservation of the original operating characteristics of the power unit,
• attractive cost-to-effect ratio compared to a new component.

Designed for petrol engines

The cylinder head has been designed to operate in an engine powered by petrol, which implies different characteristics of the combustion chambers, ports, and materials compared to diesel units. Proper matching to the fuel type is crucial for the durability of valves, seals, and for maintaining appropriate combustion temperatures.

In the case of BMW B38 B38A15A petrol engines, a correctly selected cylinder head affects engine refinement, fuel consumption, and exhaust emissions, which is why choosing a component from the same design family is important from both the user's and the service's perspective.

Integration with the engine system and further expansion

The engine cylinder head in this configuration works with the factory timing system, cooling system, and lubrication system intended for the F20/F21 and F30/F31 LCI series. During installation, it is recommended to use new gaskets and cylinder head bolts, as well as to thoroughly check the flatness of the mating surface to ensure long-term, trouble-free operation.

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as complete cylinder heads, cylinder head bodies, or bare castings, check out the available parts in the BMW Cylinder Heads category.

For a better understanding of the connections between the engine cylinder head and the rest of the powertrain, including the clutch and torque transmission, the guide article Clutch and dual-mass flywheel – diagnostics and selection of powertrain components may be helpful, as it discusses practical aspects of diagnostics and the selection of components working with the power unit.