3803976 Unit Injector Exch | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta remanufactured unit injector weighing 0.594 kg and listed for two applications in the TAD series. The reman catalogue lists it as the injector for both the TAD650VE and the TAD660VE, which take different cylinder heads but the same injector and turbocharger. Injector 3803977 weighs 0.606 kg and also lists against TAD engines, only 12 grams heavier, so the weights are effectively the same and the engine designation is what decides. This unit is supplied on an exchange basis: core deposit 3806976 is charged alongside it and refunded once the old unit is returned, so both numbers appear on the order.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD650VE
• Volvo Penta TAD660VE

• Engine Family: TAD

⚙️ Key Features

• Listed for both the TAD650VE and the TAD660VE
• 0.594 kg
• Two applications in the TAD series
• Within 12 grams of injector 3803977, so order by number

🔌 Function

Combines the high-pressure pumping element, the metering control and the nozzle in one body, delivering fuel directly into the cylinder at the pressure and timing the engine's control system commands.

⚠️ Common Signs of Failure

• Rough running or a misfire traced to one cylinder
• Hard starting with white smoke until the engine warms
• Knock or a sharp rattle from one cylinder under load
• Fuel in the engine oil, or the oil level rising
• Injector-specific faults logged by the engine management

🛠️ Service Notes

• Confirm whether the engine takes this unit injector or 3803977, because weight will not tell them apart
• Renew the copper sealing washer and the O-rings, and reset the clamp torque to the engine's figure
• Prove the low-pressure feed and the return line before condemning an injector

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• Bosch: 0 445 120 067

OEM Reman Alternatives

• Bosch: 0 986 435 549 (reman)

📦 Condition

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