Mercedes Sprinter W910 Oil Pipe OM651 Turbocharger Turbo Return Hose A6511800900

The Mercedes W910 OM651 turbo oil return line is an original turbocharger component from the Turbochargers and Parts category, designed for diesel engines. It ensures the controlled return of lubricating oil from the turbocharger to the lubrication system, which directly impacts turbine durability and stable engine operation.

Specifications and technical data

• SKU: A6511800900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511800900
• Substitutable numbers: A6511800900, A 651 180 09 00
• Fuel type: Diesel
• Category: Turbos & Parts

The role of the oil return line in the turbocharging system

The oil return line in the OM651 diesel engine is responsible for returning heated oil from the turbine housing to the oil pan or further downstream in the lubrication system. Proper oil flow:

• stabilizes the operating temperature of the turbocharger, reducing the risk of bearing overheating,
• prevents oil leaks into the intake or exhaust system,
• maintains adequate lubrication pressure throughout the diesel engine,
• reduces the formation of carbon deposits and sediments within the turbine.

A functioning oil return line is crucial for any intervention in the turbocharger, especially after regeneration or replacement of the turbine in OM651 units.

Compatibility with the OM651 engine and use in Mercedes

The OM651 diesel engine is a popular Mercedes engine used in many models, so proper turbocharging system component matching is crucial for both performance and reliability. The Mercedes W910 OM651 turbo oil return line is designed to meet the manufacturer's factory specifications, which translates into:

• proper oil management under high temperature and pressure conditions,
• proper fit to the turbine housing and engine block,
• maintaining the factory cable routing geometry, minimizing stress and vibration.

This allows the hose to be used as a service part when repairing the turbocharging system in vehicles with OM651 diesel engines, where maintaining factory-standard parameters is required.

Used condition - practical benefits and quality control

The hose offered is in used condition, allowing for cost-effective turbocharger system repairs while maintaining the original manufacturer's specifications. In practice, this means:

• lower purchase cost compared to a new element while maintaining the original design,
• can be used as a replacement in vehicles that are used intensively, where functionality and assembly compatibility are important,
• easier fit to existing OM651 engine configuration.

Before installation, it is recommended to perform a standard check for leaks and the condition of the sealing surfaces, as well as replace the seals in accordance with the vehicle manufacturer's service procedure.

Why is it worth replacing the oil return line when working with a turbocharger?

When rebuilding or replacing a diesel turbocharger, the oil return line is often overlooked, even though its condition directly impacts the lifespan of the new or rebuilt turbocharger. Line replacement is especially recommended when:

• there are signs of leaks or oil contamination in the turbine area,
• the engine was operated for a long time with overheated oil,
• the vehicle was operated in difficult conditions (high loads, frequent highway driving),
• the entire turbocharging system is being modernized.

A newly installed or reconditioned turbocharger, combined with a hose of the correct cross-section and patency, helps maintain stable lubrication and reduces the risk of premature failure.

Other oil lines for Mercedes turbochargers

If you are also looking for other oil lines for Mercedes turbochargers, check out our turbochargers and parts for Mercedes category, where you will find a wide selection of turbocharger system components for various models of this brand.

Technical support and knowledge about Mercedes engines

When planning a drivetrain repair or upgrade, it's worth expanding your knowledge of the design and specifics of Mercedes engines. An article describing the development of the manufacturer's flagship models and technical solutions may be helpful: The Evolution of the Mercedes S-Class: From W140 to W222 – Mercedes Innovations and Parts Through the Years . This is a good supplement to your knowledge when selecting components and planning long-term service.