Mercedes W211 W639 OM646 Fuel Injector Nozzle Bracket Holder Set A6290160038

Mercedes W211 OM646 Injector Holder Mounts are specialized components from the injector nozzles category, designed for OM646 diesel engines in Mercedes E-Class W211 models. They are responsible for the stable, precise mounting of diesel injectors in the cylinder head, which directly impacts the engine's running smoothness and the fuel injection system's sealing.

Specifications and technical data

• SKU: A6290160038
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6290160038
• Substitutable numbers: A6290160038, A 629 016 00 38, KD
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Function in the Injection System

Injector holder mounts in the OM646 engine are responsible for the stable guidance of injector nozzles in the cylinder head socket and maintaining proper seating against the combustion chamber. Correctly chosen mounts reduce the risk of:

• Injector seat leaks and exhaust blow-by at the injector base,
• Incorrect fuel atomization resulting from minimal deviations in nozzle position,
• Accelerated injector wear caused by micro-movements during engine operation.

In Mercedes diesel engines, precise mounting is crucial for maintaining smooth operation of all cylinders and the correct fuel dose across the entire load range.

Compatibility with OM646 Diesel Engine

The presented component is designed to work with the Diesel injection system used in OM646 engines in the Mercedes W211. This means the holder's geometry, support points, and injector guidance method are adapted to the specific design of this engine.

Selecting the correct mount is particularly important for:

• Servicing injector seats after removing carbon deposits or blow-by,
• Replacing or regenerating injector nozzles in a diesel engine,
• Restoring factory assembly geometry after previous incorrect repairs.

Characteristics of a Used Part

The injector holder mounts are from a dismantled vehicle, which allows for the preservation of original geometry and fit characteristic of factory-fitted parts in Mercedes. For workshops and users, this means the possibility of using a component with parameters close to those installed on the production line, while maintaining a favorable cost-to-quality ratio.

In practice, a used holder is often chosen in situations where:

• The original mount has deformed during the removal of a seized injector,
• There has been mechanical damage during previous cylinder head repairs,
• Several holders need replacement to restore even pressure on all injectors.

Benefits of Using the Correct Injector Mount

A correctly selected and installed injector mount in a Mercedes W211 with an OM646 engine translates into a range of practical operational benefits:

• Stable diesel engine operation due to maintaining the correct position of the injector nozzles,
• Reduced exhaust leaks and carbon buildup around the injector seats,
• Easier injection system diagnostics when errors due to improper installation are eliminated,
• Reduced risk of costly cylinder head repairs related to prolonged blow-by.

For workshops specializing in servicing Mercedes diesel engines, this is a component that allows for repairs to be carried out in accordance with the manufacturer's design specifications.

Injection System Diagnostics and Prevention

With any intervention in the diesel injection system, it is worth paying attention not only to the nozzles themselves but also to the condition of the holders and mounting elements. Minor deformations or signs of wear can, in the long run, lead to engine running problems that are difficult to directly attribute to the mount.

If you want to better understand how injection problems in diesel engines manifest and their consequences if neglected, check out the article: diesel injector faults – symptoms, consequences, and diagnostics. This is a practical addition to your knowledge when planning repairs or upgrades to the injection system.

Other Mercedes Injector Nozzles

If you are also looking for other Mercedes injector nozzles for similar service applications or want to select complete injection components for your car, check out our category Mercedes injector nozzles. This will allow you to easily match mounting holders with appropriate injectors within a single system.