Mercedes ML W164 OM642 Oil Suction Pipe Hose Sump Lubrication System A6421800251

Mercedes ML W164 OM642 Oil Suction Pipe Hose Sump Lubrication System is a specialized component of the lubrication system, responsible for effectively drawing oil from the oil sump and delivering it to the pump. A properly selected suction pipe ensures stable oil pressure, which translates into the safe operation of the OM642 engine unit. Choosing an original component from the Oil pumps and parts group allows you to maintain the factory lubrication parameters of the engine in the Mercedes ML W164.

Specifications and technical data

• SKU: A6421800251
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421800251
• Substitutable numbers: A6421800251, A 642 180 02 51
• Category: Oil Pumps & Parts

Function and role of the oil pump suction pipe

The oil pump suction pipe in the OM642 engine is responsible for delivering the lubricating medium from the oil sump to the pump, which then distributes the oil through the lubrication channels. A properly functioning component of this type:

• ensures stable oil suction under various engine operating conditions,
• reduces the risk of oil pressure drops during start-up and under high load,
• supports even lubrication of the bearings, crankshaft, and timing system,
• reduces the risk of accelerated wear of the moving parts of the engine unit.

For diesel engines such as the OM642, maintaining an efficient lubrication system is crucial for the durability and reliability of the entire powertrain.

Why it is worth using an original Mercedes component

The original oil pump suction pipe designed for the Mercedes ML W164 has been engineered for the specific construction of the OM642 engine. This means:

• precise fitment to the oil sump and pump housing,
• maintenance of the correct oil flow geometry,
• compatibility with factory mounting points,
• consistency with the lubrication system operating parameters specified by the manufacturer.

Thanks to this, installation is smooth, and the risk of leaks or improper oil suction is limited. In the case of OM642 units, the use of the correct suction pipe is important especially after repairs to the lower part of the engine or replacement of the oil pump.

Characteristics of the used component

The offered pipe belongs to the group of original used parts, which allows you to combine an attractive price with the preservation of factory specifications. This type of component is particularly attractive when servicing older Mercedes ML W164 models, where both the correct operation of the lubrication system and the optimization of repair costs are important.

Before re-installation, a standard visual inspection, verification of the sealing seats, and the cleanliness of the oil flow channel are recommended to ensure the pipe has proper operating conditions in the modernized or serviced engine.

Purpose and application in the lubrication system

Mercedes ML W164 OM642 Oil Suction Pipe Hose Sump Lubrication System is a component dedicated to working in the area of the lower part of the engine, in the immediate vicinity of the oil sump and the pump. In practice, it is used, among other things, during:

• overhaul of the OM642 engine unit,
• replacement or regeneration of the oil pump,
• troubleshooting issues related to air suction into the lubrication system,
• preventive maintenance of the lubrication system after mileages requiring a more thorough inspection.

Selecting the correct suction pipe is one of the elements of comprehensive oil system maintenance, affecting the refinement and longevity of the engine.

Benefits of choosing original used parts

Using original used components allows for reducing waste and extending the life cycle of parts, which is significant both economically and environmentally. If you want to better understand the impact of such service decisions on ecology, it is worth reading the article: Sustainable automotive and the advantages of original used parts.

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as oil pump housings, suction pipes, supply hoses, or mounting elements, check the available parts in the Mercedes oil pumps and parts category.