Sleeve BMW E81 E90 Engine Cylinder Head 7575422

Sleeve BMW E81 E90 Engine Cylinder Head is a precision timing system component designed to protect the spark plug in BMW E81 and E90 series engines. Thanks to its factory origin from the BMW group, it ensures proper geometric fit and stable guidance within the cylinder head, which promotes smooth engine operation. This is a solution for users looking for a proven, used part in a preserved, functional technical condition.

Specifications and technical data

• SKU: 7575422
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7575422
• Substitutable numbers: 11127575422, 7575422, 11127565869, 7565869, PK
• Category: Camshafts

Purpose and function in the timing system

The spark plug sleeve in BMW engines plays an important role in the cylinder head and Camshafts area, stabilizing the position of the spark plug and limiting the impact of contaminants, moisture, and temperature fluctuations. A properly selected cover helps maintain the tightness of the spark plug well, which translates into a repeatable spark and even cylinder operation. In the case of timing system intervention, cylinder head removal, or spark plug replacement, the use of the correct sleeve minimizes the risk of micro-cracks, play, and unwanted vibrations in the spark plug area.

Benefits of using an original spark plug sleeve

Using an original spark plug sleeve in a BMW E81 and E90 ensures:

• precise fit to the spark plug well and cylinder head geometry,
• stable spark plug guidance under variable thermal load conditions,
• better protection against oil and contaminants entering the spark plug well,
• reduction of the risk of electrical arcing and ignition system interference.

By maintaining factory assembly tolerances, such a sleeve works correctly with timing system components, which helps maintain proper engine performance. This is particularly important when servicing units where the timing system and cylinder head have been in operation for a longer period.

Characteristics of the used BMW part

The offered spark plug sleeve is an original BMW component sourced from dismantling, which means it retains the factory design and material specified by the manufacturer. A used part allows for an economical repair without sacrificing the proper fit for a specific type of cylinder head and timing system. In practice, this translates into:

• the ability to restore the correct spark plug mounting geometry after previous repairs,
• maintaining compatibility with factory wells and seals,
• reducing service costs while maintaining the OEM standard.

Support for BMW timing system service

When working on the cylinder head and timing system, it is worth planning the replacement of mating components to avoid re-disassembly in the short term. If you are interested in a broader context of BMW unit service, including issues related to the timing system, signs of wear, and the selection of used parts, check out the practical tips in the article: BMW N47 timing chain – typical failure and repair using original BMW parts.

Selection of elements from the BMW Camshafts 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 additional sleeves, covers, or mating guides, check out the available parts in the BMW Camshafts category.

Ecological and economic aspect

Choosing an original, used spark plug sleeve is a solution that is both financially and environmentally beneficial. Reusing functional components reduces the consumption of raw materials and energy needed to produce new replacements, while simultaneously allowing for a high level of compliance with factory specifications. If you want to learn more about the impact of such service decisions on the environment, see the article: how original used parts help reduce the carbon footprint in the automotive industry.