Marelli Manifold Opel Chevrolet 2.0 d

The intake manifold with original code 55571993 è is a component installed on various MultiJet diesel engines produced by FCA (Fiat Chrysler Automobiles). It is a complete module that integrates within it the swirl system (turbulence butterflies), useful for optimizing the air-fuel mixture in the different operating phases of the engine.
The manifold è is made of high thermal resistance plastic material, with a geometry designed to reduce pressure losses and promote volumetric efficiency.

Technical specifications

• OE Code: 55571993
• Type: complete intake manifold, with swirl flap and integrated actuator
• Material: technopolymer reinforced with metal inserts
• Swirl flap: movable blades controlled by electric actuator
• Presence of pressure or temperature sensor (depending on the version)
• Preparation for injectors and air intake connections
• Connections: flange towards the engine head and EGR connector
• Average weight: about 3–4 kg

DIPA has a range of original and quality aftermarket spare partsà equivalent.

Functionalityà

The manifold is responsible for evenly distributing the’air in the cylinders, promoting the’efficiency of combustion. The swirl system, integrated into the manifold, allows for modifying the turbulence of the’intake air based on engine load and speed, improving combustion at low speeds and contributing to the reduction of particulate emissions.
L’the electronic actuator operates the swirl flaps according to the parameters received from the engine control unit. When the system è active, a moreù turbulent flow is achieved to optimize combustion; at higherù speeds the flaps remain open to maximize the flow of’air.

Brand and model on which the part è mounted

Chevrolet

• Malibu 

OPEL

• Astra
• Astra GTC
• Astra Sport Tourer
• Zafira Tourer

DIPA recommends to always check the compatibilityà of the spare part before’purchase.

Defects and causes

The mostù frequent defects of the OE intake manifold 55571993 mainly concern the swirl system:

• Mechanical breakage of the swirl bladesresulting in loss of airflow efficiency’and increased emissions
• Jamming of the swirl butterflies in the open or closed position, which canò causing power loss, unstable idle, or delays in engine response
• Failure of the’electronic actuator that controls the swirl system, possibly generating errors in the control unit
• Oil or soot infiltrations that cause deposits and prevent the regular movement of the vanes
• Cracks in the plastic structure due to heat or prolonged mechanical stress

Final conclusions

The FCA intake manifold with OE code 55571993 è a fundamental component for managing intake turbulence and controlling emissions in the latest generation MultiJet diesel engines. Its reliabilityà è is strongly linked to the correct functioning of the swirl system.

DIPA offers customers an open line with its technicians even during the assembly phases. Our new, original, and quality aftermarket spare partsà can meet all repair needs of workshops.