23943433 Volvo Penta Inlet Manifold | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta D4 Diesel Inlet Manifold - Part Number: 23943433

A genuine used Volvo Penta inlet manifold for selected D4 common-rail marine diesel engines.

The aluminium manifold distributes compressed intake air from the turbocharger and charge-air cooler evenly to the four cylinder-head inlet ports. It also provides mounting and connection points for associated sensors, plugs, hoses and induction-system components.

Part number 23943433 is the later service reference associated with earlier manifold 3808941.

⚙️ Key Features

• Genuine used Volvo Penta D4 inlet manifold
• Current service part number 23943433
• Cross-references earlier manifold 3808941
• Fits selected D4 Aquamatic, inboard and IPS engines
• Cast-aluminium common-rail diesel intake component

🚤 Compatibility

Commonly used on

• Volvo Penta D4 common-rail diesel induction systems
• Aquamatic sterndrive, inboard, IPS and commercial installations

Typically suits

• Engine models:
• Volvo Penta D4-145I-G
• Volvo Penta D4-150A-G
• Volvo Penta D4-175I-G
• Volvo Penta D4-180I-B through D4-180I-F applications
• Volvo Penta D4-210A and D4-210I applications
• Volvo Penta D4-225A and D4-225I applications
• Volvo Penta D4-230A-G and D4-230I-G
• Volvo Penta D4-260A
• Volvo Penta D4-260D
• Volvo Penta D4-260I
• Volvo Penta D4-270A-G and D4-270I-G
• Volvo Penta D4-300A
• Volvo Penta D4-300D
• Volvo Penta D4-300I
• Selected D4-320 G-series engines using manifold 3808941 or replacement 23943433
• IPS installations using the corresponding D4 power unit
• Engine Type: Volvo Penta 3.7L inline four-cylinder common-rail turbo-diesel marine engine
• Installation Type: Aquamatic, inboard and IPS
• Year Range: Model and engine-serial dependent

🔌 Function

The manifold receives cooled, pressurised air from the turbocharger and charge-air cooler and divides it evenly between the four cylinders.

Correct airflow distribution is essential for combustion efficiency, engine power, exhaust temperature and emissions control.

⚠️ Common Signs of Failure

• Boost pressure leaks from a cracked manifold
• Engine loses power under load
• Black exhaust smoke increases
• Intake gasket leaks produce a whistling sound
• Oil mist accumulates around a leaking manifold joint
• Mounting flange is warped or damaged
• Sensor or plug threads are stripped
• Internal contamination or carbon restricts airflow
• Engine-management system records low-boost or air-pressure faults

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23943433 later Volvo Penta inlet-manifold reference
• 3808941 earlier OEM inlet-manifold reference

OEM / Related Numbers

• 23943433
• 3808941
• 3808941-1
• 11994 inlet-manifold gasket
• 966142 manifold plug
• 984738 flange screw
• 984742 flange screw
• 984744 flange screw
• 3582725 related induction-system gasket
• 3583336 related turbo and exhaust-manifold gasket
• 947627 related turbocharger gasket
• 3583622 related hose connection
• 22916981 related O-ring

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated