Mercedes W447 OM651 Fuel Injection Pressure Pipe Fuel Line Rail Set A6510704433

Mercedes W447 OM651 Fuel Injection Pressure Pipe Fuel Line Rail Set is a complete set of components from the Lines, hoses and pipes category, designed for the fuel supply system of the OM651 diesel engine. The set ensures precise delivery of diesel fuel to the injectors, which is crucial for the stable operation of the engine. This is a solution for users expecting proven, factory-spec pipe geometry and a secure fit for the common rail system in the Mercedes W447.

Specifications and technical data

• SKU: A6510704433-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510704433
• Substitutable numbers: A6510704433, A 651 070 44 33, A6510704733, A 651 070 47 33, A6510704833, A 651 070 48 33
• Fuel type: Diesel
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and role in the diesel fuel system

The fuel injection pipe set works with the Diesel OM651 engine, responsible for transporting high-pressure fuel from the common rail to individual injectors. Properly shaped pipes minimize vibrations, reduce the risk of leaks, and help maintain the correct operating pressure throughout the system.

The proper condition of the injection pipes is important for, among other things:

• stable engine idle,
• correct fuel dosing under load,
• reducing the risk of air entering the system,
• maintaining the proper refinement of the diesel unit.

Compatibility with Mercedes W447 and the OM651 unit

The presented set has been designed for use in the Mercedes W447 with the OM651 engine, ensuring that the factory pipe routing and correct mounting points are maintained. The proper fit of the shape and length of individual pipes translates into correct positioning relative to the cylinder head, common rail, and injectors, which facilitates installation and maintenance.

The original Mercedes origin means consistency with factory manufacturing standards, as well as compliance with the operating pressure parameters intended for this type of engine.

Set characteristics and advantages of use

A complete fuel injection pipe set allows for the simultaneous replacement of all pipes within a given engine, which is beneficial during major service work or after a failure of fuel injection system components. Using one consistent set reduces the risk of differences in wear between individual pipes and makes it easier to check for leaks after installation.

Key benefits include:

• preservation of factory pipe geometry and mounting points,
• adaptation to work in a high-pressure diesel injection system,
• possibility of comprehensive replacement of the entire set during a single service operation,
• consistency with the operating parameters of the OM651 unit in the Mercedes W447.

Component condition and installation aspects

The fuel injection pipe set is offered as a used part, which allows for an economical repair of the fuel system while maintaining the manufacturer's original specifications. Before installation, a standard visual inspection for any mechanical damage is recommended, as well as thorough cleaning of the seats and sealing surfaces in the cylinder head and common rail.

Proper installation of the pipes – while maintaining the tightening torques recommended by the vehicle manufacturer – is essential for maintaining connection tightness and long-term, trouble-free operation of the injection system.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as fuel lines, vacuum hoses, or fuel return pipes, check out the available parts in the Mercedes lines, hoses and pipes category.

For a better understanding of the impact of properly functioning auxiliary systems on engine durability, it is worth reading an article describing the operation of the cooling system and the consequences of engine overheating: Engine cooling system – overheating, repair and used radiators.