Lexus LS400 Water Coolant Pump Engine Cooling 1UZ-FE 1610050022

Lexus LS400 Water Coolant Pump Engine Cooling 1UZ-FE is an original component from the Water pumps group, designed for the cooling system of the 1UZ-FE unit in the Lexus LS400 model. Thanks to its factory design, it ensures proper coolant circulation, stabilizing the engine's operating temperature and supporting its durability.

Specifications and technical data

• SKU: 1610050022
• Mark: Lexus
• Condition: Used
• OEM Part Number: 1610050022
• Substitutable numbers: 1610050022, 16100 50022
• Category: Water Pumps

Purpose and function in the cooling system

The coolant pump in the 1UZ-FE engine is responsible for the forced circulation of fluid between the engine block, cylinder heads, and the radiator. A properly functioning component in this group:

• maintains a stable operating temperature of the power unit,
• reduces the risk of overheating under load and during highway driving,
• supports even heat dissipation from the cylinders and combustion chambers,
• ensures correct cooperation with the thermostat and radiator.

For the 1UZ-FE V8 engine, using the correct pump is crucial for maintaining smooth operation, appropriate oil viscosity at high temperatures, and the long service life of seals and accessory components.

Original origin and fitment for the Lexus LS400

The presented pump comes from the Lexus brand, which means it retains factory flow parameters, impeller geometry, and mounting points. Thanks to this:

• it fits the factory 1UZ-FE engine cooling system without modifications,
• it maintains compatibility with the original flow channels in the block and timing cover,
• it enables correct tensioning and routing of belt-driven accessories (where the design involves belt operation).

Such fitment reduces the risk of leaks, incorrect impeller axis alignment, or excessive vibrations, which is significant for the long-term operation of a premium class vehicle.

Characteristics of the used component

The pump comes from a used vehicle, therefore, before installation, it is recommended to perform a standard check of its operating condition, axial play, and any signs of leaks. A used component from this group can be an attractive solution in situations where:

• you are looking for parts with factory specifications at a reasonable price,
• you are planning a cooling system repair for a daily-driven car,
• you want to maintain the original system design without using replacements with uncertain parameters.

Before installation, it is also worth verifying the condition of cooperating cooling system components, such as hoses, the radiator, or the thermostat, to avoid the need for re-disassembly in the near future.

Selection by numbers and technical compatibility

The pump has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification and comparison with the element currently installed in the vehicle. When selecting, it is recommended to:

• compare the markings with the previously used pump,
• verify compatibility with the 1UZ-FE engine in the Lexus LS400,
• check the cooling system configuration for the specific model year and equipment version.

To better understand the principles of selecting components by factory numbers and to avoid mistakes when purchasing used parts, it is worth using the practical tips included in the guide how to choose the right car part by VIN and OEM number.

Technical support and additional resources

Although the coolant pump belongs to the cooling system, in many cases, its replacement is performed in parallel with work on the fuel system or engine accessories. For a comprehensive approach to servicing the power unit, an article discussing the diagnostics and selection of engine supply components may be helpful – fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes knowledge about the operation of key engine components.

If you are planning a comprehensive repair or upgrade of the engine area in your Lexus and need other elements from the same group, such as housings, impellers, or seals, check the available parts in the Lexus Water pumps category.