BMW E39 E46 Diesel Thermostat Coolant Housing EGR Valve Cooler 2247723

BMW E39 E46 Diesel Thermostat Coolant Housing EGR Valve Cooler is a component from the Thermostats and housings category, designed for BMW diesel systems. It enables proper coolant flow in the EGR valve area, supporting stable operating temperatures for the diesel engine and ensuring correct interaction with the cooling system.

Specifications and technical data

• SKU: 2247723
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2247723
• Substitutable numbers: 2247723, 11712247723
• Fuel type: Diesel
• Category: Thermostats & Housings

Purpose and function in the cooling system

The thermostat housing in a BMW diesel engine is responsible for directing coolant flow between the radiator, engine block, and the EGR valve area. A properly selected component helps maintain the optimal operating temperature of the powertrain, which translates into stable performance, reduced fuel consumption, and correct operation of the exhaust gas recirculation system.

In BMW E39 and E46 series models with diesel engines, the proper condition of the thermostat housing is important for:

• maintaining the appropriate coolant temperature throughout the entire circuit,
• proper warm-up of the diesel engine after start-up,
• stable operation of the EGR valve in both urban and highway driving conditions,
• reducing the risk of engine overheating or undercooling.

Technical characteristics and fitment

The presented housing belongs to the Thermostats and housings group, meaning it is designed to work with the cooling system and temperature control elements. The construction is prepared for operation in diesel-powered engines, taking into account the temperature ranges and thermal loads typical for these units.

The element is part of the original BMW system, which facilitates fitting to factory connectors, hoses, and mounts in the engine bay. This allows for maintaining the standard coolant flow geometry and correct interaction with the thermostat and EGR valve, without the need for system modifications.

Condition, application, and benefits of installation

The thermostat housing is offered as a used part, which allows for an economical replacement while maintaining compatibility with the factory system. In many cases, this is a beneficial solution for maintenance repairs when the existing housing has cracked, deformed, or developed leaks in the area of the cooling hose connections.

Replacing a worn housing with a functional unit of this type can provide measurable benefits:

• reduction of coolant leaks in the vicinity of the EGR valve,
• more stable diesel engine operating temperature in both city and highway cycles,
• reduced risk of air pockets in the cooling system,
• easier diagnostics of any potential further issues with the thermostat or radiator.

Support with selection and additional technical information

For this housing model, dedicated manufacturer markings and interchangeable numbers are available, which facilitates compatibility verification with a specific version of the BMW E39 or E46 engine. It is worth comparing the markings with vehicle data and the existing component to ensure proper fitment with the cooling system and EGR valve.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as housings, thermostat inserts, or connection pipes, check the available parts in the BMW Thermostats and housings category.

Practical service tips and additional knowledge

When replacing the thermostat housing in a diesel engine, it is worth paying attention to the condition of the cooling hoses, clamps, and the thermostat itself. Proper bleeding of the system after installation is crucial to avoid local overheating in the area of the cylinder head and EGR valve.

If you are simultaneously planning work on the drivetrain, including potential gearbox replacement or diagnostics, a guide on common faults and purchasing used transmissions may be helpful – you can find it in the article Gearbox: manual, automatic or DSG – common faults and a guide to buying a used transmission.