Mercedes W164 OM642 Engine Coolant Flange Connector Hose A6422000056

Mercedes W164 OM642 Coolant Water Flange R6032032631 is an original part from the Cooling System Hoses and Pipes category, designed for OM642 diesel engines in Mercedes W164 models. This precisely manufactured flange ensures stable coolant flow, supporting the proper operation of the cooling system and reducing the risk of engine overheating. A used OEM component is a sensible choice for drivers seeking a technically proven solution at an attractive price.

Specifications and technical data

• SKU: A6422000056
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6422000056
• Substitutable numbers: A6422000056, A 642 200 00 56
• Category: Coolant Hoses

Purpose and Function of the Flange in the OM642 Cooling System

The water flange in the OM642 engine is responsible for controlled coolant flow between the components of the cooling system. In units installed in the Mercedes W164, it is crucial for:

• maintaining stable engine operating temperature under load,
• ensuring the tightness of cooling hose connections,
• limiting pressure drops in the fluid circuit,
• proper cooperation with other cooling system pipes and hoses.

A well-chosen flange minimizes the risk of coolant leaks, which translates to safer vehicle operation and reduced thermal load on the engine.

Construction, Fitment, and Installation

The offered flange is structurally adapted to the architecture of the OM642 engine in the W164 body. This means that:

• the flange's geometry matches the factory routing of cooling hoses,
• mounting points are prepared for standard brackets and clamps,
• connection diameters correspond to factory cooling system hoses.

This precise fit facilitates installation and allows for maintaining the original hose routing, which is important for both servicing and subsequent diagnostics. A used OEM part usually integrates better with the existing configuration than universal-fit aftermarket replacements.

Benefits of Using an Original Mercedes Flange

Using an original water flange in the cooling system offers a range of practical operational benefits:

• Factory Fitment – maintaining the original hose route and correct flange position relative to the engine.
• Stable Cooling System Operation – proper coolant flow reduces the risk of localized overheating.
• Easier Diagnostics – the mechanic works with a system consistent with the manufacturer's service documentation.
• Cost Optimization – a used OEM part allows combining original quality with a more favorable repair cost.

Replacing a worn or damaged flange is particularly recommended when symptoms such as coolant loss, signs of corrosion at connections, or leaks around the hoses are present.

Condition, Verification, and Service Application

The offered flange is a removed part and is classified as a used original part. This type of component is well-suited for:

• routine cooling system repairs in Mercedes W164 with OM642 engines,
• preventive maintenance after an overheating failure,
• restoring the factory configuration of cooling system pipes and hoses.

Before installation, a standard check of connection tightness and an assessment of the condition of cooperating hoses and clamps are recommended to restore the full functionality of the entire cooling circuit in a single service operation.

More Cooling System Components and Technical Knowledge

If you are looking for other components from the Cooling System Hoses and Pipes category dedicated to this brand, check out our offer for Mercedes Cooling System Hoses and Pipes, where you will find a wide selection of parts for various models.

When planning a repair, it is worth expanding your knowledge about typical overheating symptoms and the impact of the cooling system on engine longevity. The article: Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses practical aspects of diagnostics and servicing, may be helpful.