BMW E81 E90 E91 E92 F10 F11 F20 F21 F30 F31 Mini F55 F56 Screw Fuel Injection

BMW E81 E90 E92 F10 F20 F30 F31 Mini F55 F56 Injector Clamp Bolt is a precision fastening element from the injector nozzles category, designed for use in selected BMW and Mini models. It is responsible for the stable, repeatable pressing of the injector clamp to the cylinder head, which directly impacts the sealing and proper operation of the fuel system.

Specifications and technical data

• SKU: 7805256
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805256
• Substitutable numbers: 7805256, 13537805256
• Category: Fuel Injectors

Purpose and Function in the Injection System

The BMW injector clamp bolt operates at a critical point in the fuel system, where repeatable clamping force and resistance to variable thermal loads are required. A properly selected fastening element reduces the risk of:

• injector seat leakage and exhaust gas blow-by into the chamber under the valve cover,
• injector micro-displacements, which can affect fuel atomization quality,
• accelerated wear of the seats and components accompanying the injector.

Choosing the correct mounting bolt is crucial for any intervention in the injection system – both during injector replacement and for service work related to seals.

Compatibility with BMW and Mini Models

The presented BMW injector clamp bolt has been designed to work with powertrains used in, among others, BMW series E81, E90, E92, F10, F20, F30, F31, and in selected Mini F55 and F56 models. This ensures compatibility with the factory geometry of injector seats and mounting clamps in these constructions.

In practice, this translates to:

• correct distribution of clamping force along the injector axis,
• compliance with factory tightening torques specified by the manufacturer,
• easier service installation without the need for modifications to accompanying components.

Component Characteristics and Service Application

As an element from the injector nozzles category, the bolt works directly with the clamp holding the injector in its seat. Replacing this component is particularly recommended when:

• injectors have been removed for repair or diagnostics,
• signs of stretching or corrosion have been observed on existing bolts,
• blow-by has occurred around the injector seats.

The proper condition of the mounting bolts is important not only for sealing but also for even loading of the cylinder head and the durability of the entire injection system.

Part Condition and Practical Aspects

The offered BMW injector clamp bolt is a used part, removed from a vehicle, and intended for users seeking an original element with factory geometry. When installing, it is recommended to:

• thoroughly clean the seat in the cylinder head and the contact surface of the clamp,
• apply the correct tightening torque according to BMW/Mini service documentation,
• check injector alignment after tightening to ensure proper sealing.

This approach reduces the risk of subsequent leaks and facilitates potential future service work on the injectors.

Technical Support, Diagnostics, and Related Products

When experiencing issues with the injection system, it is worth paying attention not only to the injectors themselves but also to the mounting elements and seals. If you want to better understand the symptoms of wear and the consequences of neglect, the article: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails will be helpful, as it discusses typical symptoms and diagnostic methods.

If you are also looking for other elements from the BMW injector nozzles category for your car, check out the BMW injector nozzles available in our store to complete a full set of components for professional fuel system servicing.