BMW E90 E92 E93 M3 S65 Cylinder Head With Camshaft Cyl 5-8 7838147

BMW E90 E92 E93 M3 S65 Cylinder Head With Camshaft Cyl 5-8 is an original part from the Cylinder Heads group, designed for the S65 unit used in BMW 3 Series M3 sports models. The product is offered in for parts or not working condition, making it a suitable choice as a base for professional refurbishment, a donor for components, or an element for training and diagnostic purposes.

Specifications and technical data

• SKU: 7838147-1
• Mark: BMW (Genuine OE)
• Condition: For parts or not working
• OEM Part Number: 7838147
• Substitutable numbers: 7838147, 11127838147
• Category: Cylinder Heads

Technical characteristics of the S65 cylinder head for cylinders 5–8

The presented cylinder head is responsible for the second bank of cylinders in the V8 S65 engine used in BMW E90, E92, and E93 M3 models. The design of this unit is based on an advanced architecture with a high-performance fuel supply system and precise valve timing, which is why proper fitment of the cylinder head is crucial for combustion chamber sealing, stability at high RPMs, and maintaining factory power parameters.

The cylinder head from this series is designed for intensive use, typical of sports-oriented vehicles. It is responsible for valve guidance, cooperation with the timing system, and proper cooling of the upper part of the engine, which has a direct impact on the durability of the power unit.

Application in BMW E90, E92, E93 M3

The discussed cylinder head is intended for installation in the S65 engine used in the sedan, coupe, and convertible bodies of the E9x generation 3 Series M3. Thanks to the preservation of the factory geometry of the intake and exhaust ports and the original specification, after proper machining and refurbishment, it can serve as a solid base for restoring the power unit's efficiency or building a project engine.

In practice, such an element is often used as:

• a base for comprehensive cylinder head rebuilding in a specialized mechanical machining facility,
• a donor for selected structural components,
• a reference element for repairs and diagnostics of S65 engines.

Technical condition and usage recommendations

The product is offered in for parts or not working condition, which means it is not intended for direct installation without prior verification and potential repair. This status is important information for workshops and specialists dealing with BMW M engines who are planning:

• surfacing of the mating area,
• replacement or refurbishment of valve guides and seats,
• leak testing and potential welding or repair of cracks.

Before using the cylinder head in an engine project, a full metrological inspection is recommended, including flatness measurement, checking oil channels, and assessing the condition of threads and mounting surfaces. This allows for safe planning of the scope of work and selecting the appropriate refurbishment technology.

Benefits of using an original BMW cylinder head

Choosing an original cylinder head from the BMW M3 S65 family ensures the preservation of factory compatibility with the engine block, timing system, and accessories. For workshops specializing in the BMW brand, this means:

• easier fitment to the existing power unit configuration,
• the ability to use proven refurbishment procedures,
• maintaining the operating characteristics typical of the S65 engine after the repair is completed.

For users planning long-term operation of an M3 after an engine overhaul, it is important that basing the repair on original components facilitates subsequent service and diagnostics.

Related items from the BMW Cylinder Heads group

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as cylinder head bodies for the remaining cylinders, valve covers, or additional mounting components, check the available parts in the BMW Cylinder Heads category.

For better planning of the scope of work on the power unit and assessing the cost-effectiveness of using used components, it is worth reading our guide material on the structural and operational differences between stock and sports solutions – you can find it in the article Stock vs. sports suspension – differences in construction and is it worth buying used suspension parts?.