21379943 Unit Injector | Genuine Volvo Penta Part

🔧 Product Description

Genuine Delphi E3.18 electronic unit injector calibrated for selected high-output Volvo Penta D13B-A MP and MD13 marine propulsion engines. It uses the Delphi BEBE4D26001 calibration and is intended for the correct matched D13 marine-engine specification. Because injection rate and nozzle calibration differ between D13 applications, part number 21379943 must be confirmed against the engine product designation, serial number and original injector number.

🚤 Compatibility

Typically suits:

• Volvo Penta D13C2-A MP
• Volvo Penta D13C4-A MP
• Volvo Penta D13B-A MP
• Volvo Penta D13B-H MP
• Volvo Penta D13B-G MP
• Volvo Penta D13B-L MP
• Volvo Penta D13B-K MP
• Volvo Penta D13B-C MP
• Volvo Penta D13C5-A MP

• Engine Family: D

⚙️ Key Features

• Genuine Volvo Penta high-output marine unit injector
• Delphi BEBE4D26001 E3.18 injector design
• Designed for selected D13B-A MP and MD13 propulsion applications
• Genuine remanufactured reference 3801370
• Precision electronic control of injection timing and quantity
• Requires correct injector seals, yoke torque and valve/injector adjustment
• Engine type: Inline 6-cylinder, twin-turbo or high-output turbocharged marine diesel, depending on configuration
• Quantity varies by assembly, most commonly six

🔌 Function

The unit injector creates high fuel pressure and injects a precisely metered, finely atomised fuel charge directly into the combustion chamber. Its calibration is matched to the engine's piston, turbocharging, ECU software and rated-power specification.

⚠️ Common Signs of Failure

• Hard starting or failure to start
• Rough idle or one weak cylinder
• Loss of rated power
• Black or white exhaust smoke
• Abnormally high exhaust temperature
• Increased fuel consumption
• Diesel contamination of the engine oil
• Injector electrical or cylinder-balance fault codes
• Combustion knock or irregular engine sound
• Excessive leakage or poor injector return-flow result

🛠️ Service Notes

• Work scrupulously clean: cap or plug the fuel connections as soon as they are opened and keep grit out of the injector bore and off the injector body — contamination is the commonest cause of a new unit injector failing early
• Fit new O-rings and sealing washers throughout, lightly lubricated on assembly so they slide into the bore without rolling or being nipped
• Inspect the copper sleeve in the head while the injector is out; a sleeve that is disturbed, corroded or leaking must be renewed with the proper sleeve tooling before the injector goes back
• Clean the injector seat and the sealing area at the top of the bore, and check the hold-down clamp and yoke for wear or distortion — a bent clamp will let combustion gases past
• Tighten the clamp and set the unit injector adjustment to the procedure, sequence and figures in the workshop manual for your engine, bleed the fuel system before cranking, and where the engine management holds injector calibration or trim data, program the new injector in

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3801370 - Genuine Volvo Penta remanufactured equivalent

OEM / Related Numbers

• 3801370 related reference
• 276948 - Injector O-ring kit
• 21261987 - Injector washer
• 21168206 - Injector yoke
• 8131597 - Flange screw
• 8131393 - Retainer

Other-Brand OEM Numbers

• Delphi: BEBE4D26001
• Delphi: HRE350

OEM Reman Alternatives

• Delphi-format remanufactured replacements: BEBE4D26001

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging