Citroen Relay 35L C4 Grand Picasso Exhaust Manifold Gasket Diesel 9800943180

Citroen Relay 35L C4 Grand Picasso Exhaust Manifold Gasket is an original component from the Exhaust manifolds group, designed for diesel engines. It ensures a tight connection between the manifold and the cylinder head, which translates into stable engine operation, proper exhaust gas discharge, and the maintenance of factory exhaust system parameters.

Specifications and technical data

• SKU: 9800943180
• Mark: Citroën
• Condition: Used
• OEM Part Number: 9800943180
• Substitutable numbers: 9800943180, 98 009 431 80
• Fuel type: Diesel
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The exhaust manifold gasket in a diesel engine is responsible for maintaining the correct pressure and flow direction of exhaust gases between the cylinder head and the manifold. In vehicles such as the Citroën Relay 35L and Citroën C4 Grand Picasso, this has a direct impact on:

• stable turbocharger operation and correct throttle response,
• reduction of exhaust leaks and noise in the engine compartment,
• maintaining the proper operating parameters of sensors and probes in the downstream part of the exhaust system.

A properly selected manifold gasket helps maintain factory torque characteristics and supports even load distribution across individual cylinders.

Benefits of using an original Citroën gasket

Using a component from the same product line as factory Citroën parts means precise fitment to the mating surfaces of the manifold and cylinder head. As a result:

• the risk of leaks at the manifold-to-head interface is minimized,
• the exhaust system's integrity is maintained across the full load range,
• the possibility of localized overheating in the area of the exhaust ports is reduced.

In diesel engines, proper exhaust system sealing is important not only for acoustic comfort but also for the durability of the turbocharger and exhaust aftertreatment components.

Installation characteristics and use in diesel engines

The manifold gasket designed for diesel-powered units operates at elevated temperatures and under high pressure loads. In practice, this means that every time the exhaust manifold is serviced – whether for removal, regeneration, or replacement – it is recommended to install a fresh gasket in order to:

• prevent re-leaking after a short period of operation,
• avoid power loss resulting from exhaust gas escaping before the turbine,
• protect adjacent engine compartment components from hot gases.

Selecting a gasket dedicated to a specific diesel engine configuration in a Citroën facilitates subsequent diagnostics – any potential issues with boost pressure or noise will not be caused by an ill-fitting sealing component.

Part condition and practical aspects

The offered gasket comes from dismantling and is classified as a used part, which allows for economical repair while maintaining the manufacturer's original specifications. This type of solution is often chosen for servicing fleet vehicles and commercial vans, where reasonable maintenance costs are important while keeping the engine's operating parameters correct.

Before installation, it is recommended to perform standard preparation of the manifold and cylinder head mating surfaces and check for flatness to fully utilize the sealing properties of the component and avoid the need for further intervention in the exhaust system.

If you are planning a comprehensive repair or upgrade of the engine area in your Citroën and need other components from the same group, such as manifolds, connectors, or additional gaskets, check out the available parts in the Citroen Exhaust manifolds category.

More about used manifolds and exhaust systems

When selecting components for the exhaust system – including manifold gaskets – it is worth knowing the specifics of how used manifolds operate, their impact on performance, and the durability of the entire system. If you want to expand your knowledge on the operation and selection of such components, check out the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses the practical aspects of using used components in various brands and engine configurations.