Land Rover Discovery 4 L319 Auxiliary Belt Tensioner CPLA-6A228-AB

The Land Rover Discovery 4 L319 Serpentine Belt Tensioner CPLA-6A228-AB is a component from the Tensioners and Rollers group, responsible for the stable guidance of the accessory belt in the engine. The precise geometry of the tensioner ensures proper belt tension, which translates to the correct operation of key components driven by the crankshaft. This solution is designed for users expecting a robust, factory design tailored to the specifics of Land Rover models.

Specifications and technical data

• SKU: LR016140
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR016140
• Substitutable numbers: LR016140, AH226A228AA, AH22-6A228-AA, CPLA-6A228-AB, CPLA6A228AB
• Category: Tensioners & Pulleys

Tensioner Purpose and Function

The serpentine belt tensioner in the Discovery 4 L319 is responsible for maintaining constant, controlled tension of the accessory belt across a wide range of loads and temperatures. A properly functioning component minimizes the risk of belt slippage, noise, and accelerated wear of rollers and pulleys. Thanks to its factory design, adapted to the Land Rover drivetrain, proper interaction with other engine accessory components is maintained.

Construction and Technical Characteristics

The tensioner in this series utilizes a spring-loaded mechanism that automatically adjusts belt tension without the need for manual correction after installation. The integrated tensioning arm and guide roller are designed to ensure stable belt guidance under varying engine speeds. The design for the Discovery 4 L319 takes into account the characteristic loads of the accessory system in this model, promoting smooth operation and reducing vibrations transmitted to the belt.

Thanks to the use of original mounting geometry, the tensioner works with the factory mounting points in the engine bay. This facilitates servicing and reduces the risk of incorrect belt path alignment, which is particularly important in off-road vehicles and those used in varied conditions.

Benefits of Using an Original Tensioner

Using a tensioner dedicated to the Discovery 4 L319 allows for maintaining accessory system operating parameters in line with the manufacturer's specifications. Key benefits include:

• maintaining stable belt tension under varying engine loads,
• reducing the risk of belt squealing and slippage,
• decreasing the load on the bearings of the alternator, pump, and other components,
• maintaining the correct belt path throughout its operating range.

For Land Rover users, it is also important that the serpentine belt tensioner from this parts group is designed with specific operating conditions in mind, including off-road use, frequent load changes, and prolonged driving with additional power consumers.

Condition, Fitment, and Installation Aspects

The offered item is in used condition, allowing for an economical approach to servicing while maintaining a factory design. Before installation, standard visual inspection and checks of the roller and tensioning mechanism operation are recommended, in accordance with the service procedures used for Land Rover vehicles.

By retaining the original mounting concept, the tensioner is ready for installation in place of the factory component, without the need for modifications to brackets or additional adapters. In practice, this reduces service time and helps maintain the integrity of the entire accessory system.

Integration with the Accessory System and Additional Materials

A functional tensioner directly impacts alternator operation, so when diagnosing the charging system, it is worth considering the condition of the belt and guide components. For drivers interested in a broader perspective on engine accessories and charging systems, the following guide may be useful: When is it worth replacing an alternator with a used one: a practical guide for drivers.

If you are planning a comprehensive repair or upgrade of the engine accessory area in your Land Rover and need other components from the same group, such as additional tensioners, guide rollers, or accessory belt components, check the available parts in the Land Rover Tensioners and Rollers category.