Fiat Alfa Lancia Jeep manifold 2.0 d

The intake manifold with original code 55231270 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 air-fuel mixing during the different operating phases of the engine.
The manifold è made of high thermal resistance plastic, with a geometry designed to reduce pressure losses and enhance volumetric efficiency.

Technical specifications

• OE Code: 55231270
• 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 connection for EGR
• Average weight: approximately 3–4 kg

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

Functionalityà

The manifold is responsible for evenly distributing the’air in the cylinders, favoring the’efficiency of combustion. The swirl system, integrated into the manifold, allows for modification of 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.
The’electronic actuator controls the swirl butterflies according to the parameters received from the engine control unit. When the system è is active, a moreù turbulent flow is obtained to optimize combustion; at higherù speeds, the butterflies remain open to maximize the flow of’air.

Brand and model for which the part è mounted

Alfa Romeo

• Giulietta

Fiat

• Bravo

• Freemont

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

Defects and causes

The mostù frequent defects of the OE intake manifold 55231270 mainly concern the swirl system:

• Mechanical breakage of the swirl bladesresulting in a loss of airflow efficiency’and an increase in emissions
• Sticking of the swirl butterflies in the open or closed position, which canò cause power loss, unstable idle, or delays in engine response
• Failure of the’electronic actuator that controls the swirl system, with possible generation of 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 55231270 è a fundamental component for managing turbulence in intake 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.