Nissan Qashqai j10 Renault Koleos 2.0 dCi Breather Valve Heat Shield CA2258A

Nissan Qashqai j10 Renault Koleos 2.0 dCi Breather Valve Heat Shield is a specialized component from the Heat shields, connectors and couplings group, designed to protect the breather system in diesel units. This used original part ensures factory-fit, stable mounting, and an effective thermal barrier in the engine bay.

Specifications and technical data

• SKU: CA2258A
• Mark: Nissan
• Condition: Used
• OEM Part Number: CA2258A
• Substitutable numbers: CA2258A
• Category: Heat Shields, Wraps & Sleeves

Purpose and function of the breather valve heat shield

The breather valve heat shield in Nissan Qashqai j10 and Renault Koleos 2.0 dCi models is responsible for limiting the impact of high temperatures from the turbocharger, manifold, and other hot components on the breather hoses. It stabilizes the operating conditions of the crankcase ventilation system, which helps maintain proper gas flow and reduces the risk of hose and connector degradation.

A properly selected shield helps to:

• reduce local overheating of breather hoses,
• limit heat transfer to adjacent plastic and rubber components,
• maintain predictable operating conditions for the breather system in the 2.0 dCi engine.

Construction and fitment for Nissan Qashqai j10 and Renault Koleos 2.0 dCi

The presented shield belongs to the Heat shields, connectors and couplings group, which means it has been designed to work in the immediate vicinity of engine components exposed to high temperatures. The shape, mounting points, and geometry are adapted to the factory breather system in the Nissan Qashqai j10 and Renault Koleos 2.0 dCi, ensuring that installation is straightforward and requires no modifications.

The properly formed surface of the shield allows for:

• precise routing of breather hoses along the designated path,
• maintaining clearance from hot metal components,
• reducing vibrations and chafing of hoses against adjacent components.

Benefits of using an original heat shield

Using a dedicated heat shield in the breather system provides measurable operational benefits. This component supports engine stability by protecting hoses and connectors from excessive heating, which in the long run can reduce the risk of leaks and the need for premature hose replacement.

Key advantages include:

• Factory fit for a specific engine configuration – no need to adapt universal shields.
• Consistency with the original hose routing system – maintaining the geometry of flow designed by the manufacturer.
• Stable operation in high-temperature conditions – the shield is adapted to the typical thermal loads in a diesel engine bay.

Part condition and service application

The offered breather valve heat shield is a used part, making it an attractive service solution for users looking for factory-fit parts at a reasonable price. This type of component is particularly useful during repairs related to the breather system, hose or connector replacement, or when working on the upper part of the engine where access to the shield is facilitated.

Replacing the shield is recommended, among other situations, when:

• the existing shield is mechanically damaged or deformed,
• there are signs of overheating on adjacent breather hoses,
• comprehensive maintenance of the crankcase ventilation system is being performed.

Expanding the thermal protection system in Nissan

If you are planning a comprehensive repair or upgrade of the engine area in your Nissan and need other elements from the same group, such as additional shields, connectors, or couplings protecting the hoses, check the available parts in the Nissan heat shields, connectors and couplings category.

If you are interested in a broader approach to upgrading your vehicle using dismantled components, it is worth learning about practical examples and tips regarding vehicle retrofitting – more information can be found in the article on professional retrofitting with used parts.