Land Rover Discovery 4 L319 Oil Separator Breather 3.0D V6 306DT 9X2Q-6A785-CB

Land Rover Discovery 4 L319 Oil Separator 3.0D 306DT 9H2Q-6A785-CB is a specialized component of the crankcase ventilation system, designed for 3.0D 306DT diesel engines. It is responsible for stable separation of oil mist from engine gases, which supports the proper operation of the powertrain and reduces intake contamination. This solution is dedicated to Land Rover constructions, designed for the demanding operating conditions of the Discovery 4.

Specifications and technical data

• SKU: LR013287
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR013287
• Substitutable numbers: LR013287, 9X2Q-6A785-CB, 9X2Q6A785CB
• Category: Engine Oil Coolers & Lines

Function of the Oil Separator in the 3.0D 306DT Engine

The oil separator in the 3.0D 306DT engine plays a crucial role in controlling the flow of blow-by gases from the crankcase. Its tasks include:

• separating oil particles from gases before they return to the intake system,
• limiting oil deposits in the intake manifold and pipes,
• stabilizing crankcase pressure under various engine loads,
• assisting in maintaining consistent operation of the 3.0D unit over a longer period.

Thanks to a properly functioning separator, the ventilation system operates predictably, contributing to cleaner intake operation and more consistent combustion parameters.

Purpose and Fit for Land Rover Discovery 4 L319

The described separator has been designed with the 3.0D 306DT engine architecture used in the Land Rover Discovery 4 L319 in mind. This means it is adapted to:

• the geometry of the powertrain and the arrangement of accessories,
• the factory ventilation hose system and mounting points,
• the thermal conditions typical for the engine bay in this model.

Such a fit translates to easier installation in place of a worn component and adherence to the manufacturer's original concept for engine gas management.

Benefits of Using a Used Oil Separator

Choosing a used oil separator for the Discovery 4 L319 is a solution that combines technical aspects with cost control. In practice, this means:

• the ability to restore proper ventilation system operation without the need to invest in a new component,
• maintaining compliance with the original Land Rover construction,
• reducing the risk of excessive intake oiling with a functional separator.

This is particularly important in diesel engines, where stable crankcase ventilation affects the long-term durability of the powertrain.

Role in the Lubrication and Oil Cooling System

Although the oil separator is not a conventional cooler, it works in conjunction with the lubrication system and indirectly affects the operating conditions of the engine oil. Limiting oil loss in the form of oil mist and controlling gas flow from inside the engine contributes to:

• more predictable oil consumption between changes,
• reduced contamination in the intake area and cooperating components,
• maintaining stable operating conditions under loads typical for off-road and on-road vehicles.

As a result, the oil separator is an important element supporting the cohesive operation of the lubrication system and oil circulation in the 3.0D engine.

Component Condition and Service Application

The product belongs to the Oil Coolers and Hoses group, meaning it is intended for operation in the vicinity of components responsible for oil circulation and condition. As a used part, it can be an attractive option for:

• routine repairs on well-used Discovery 4 L319 models,
• preventive maintenance of the ventilation system when experiencing symptoms of excessive intake oiling,
• restoring the factory configuration after previous modifications.

Selecting the correct oil separator for a specific 3.0D 306DT unit ensures consistency with service documentation and the manufacturer's design specifications.

If you are planning a comprehensive repair or upgrade of the engine area in your Land Rover and need other components from the same group, such as oil lines, oil cooling modules, or additional lubrication circuit elements, check the available parts in the Land Rover Oil Coolers and Hoses category.

To better understand how engine operating temperature and oil circulation affect component durability, consult our guide “Summer Heat vs. Cooling System: Used Coolers and Fans Guarantee Savings”, where we discuss practical aspects of operating and servicing cooling systems in demanding conditions.