Mercedes C117 W176 W246 OM651 Engine Coolant Flange Connector Hose A6512000556

The Mercedes C117 W176 W246 OM651 Water Flange is an original cooling system component from the Cooling System Hoses and Pipes group, designed for use in OM651 engines in select Mercedes models. The precise geometry of the flange ensures proper coolant flow, stable engine operation, and correct interaction with other system components.

Specifications and technical data

• SKU: A6512000556
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6512000556
• Substitutable numbers: A6512000556, A 651 200 05 56
• Category: Coolant Hoses

Function of the Flange in the OM651 Cooling System

The water flange in the OM651 engine is responsible for the sealed and directed flow of coolant between the engine block and other system components. A correctly selected part:

• maintains stable coolant flow under various engine loads,
• limits the risk of localized overheating in the cylinder head and block areas,
• ensures proper connection with flexible hoses and other flanges.

This allows the cooling system in C117, W176, and W246 models with the OM651 engine to operate under predictable thermal conditions, contributing to the durability of the powertrain.

Compatibility with Mercedes C117, W176, W246 Models

The presented flange has been specifically designed for the OM651 engine architecture used in the C117, W176, and W246 body styles. This means:

• maintaining the factory connection geometry with cooling hoses,
• proper fitment to the mounting points and sockets in the engine,
• consistency with the operating parameters of the stock cooling system.

Such a precise fit facilitates installation and allows for the preservation of the operating characteristics intended by the vehicle manufacturer.

Characteristics of the Component from the Cooling System Hoses and Pipes Category

The water flange belongs to the group of components responsible for distributing coolant within the engine. In practice, this means it interacts with flexible hoses, T-connectors, thermostat housings, and other system connectors. A correctly selected component:

• helps maintain the seal of the entire cooling circuit,
• limits the risk of leaks at critical connection points,
• allows for the maintenance of proper fluid operating pressure.

For OM651 units, this is particularly important during intensive use, such as in city traffic or during long highway journeys.

Component Condition and Installation Aspects

The offered water flange is a used part, allowing for an economical repair of the cooling system while maintaining the original design. Before installation, a standard inspection of the sealing surfaces and the sockets for clamps and connectors is recommended, as well as verification of the cooperating hoses for any signs of wear.

During replacement, it is worth paying attention to:

• correct routing of hoses relative to the flange,
• selection of appropriate clamps and fastening elements,
• bleeding the cooling system after completing the service work.

Technical Support and Cooling System Knowledge

For users who want to better understand the impact of engine operating temperature on component durability, a guide describing operation in high temperatures and the importance of an efficient coolant circulation will be useful – details can be found in the article Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other parts from the same group, such as additional flanges, flexible hoses, or water connectors, check the available parts in the Mercedes Cooling System Hoses and Pipes category.