3806570 Unit Injector Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a unit injector, from the Fuel System group. It is the refundable charge raised against the old unit injector when the exchange unit is bought, and it comes back once the worn unit injector is returned. The line itself is an accounting entry rather than a part, so nothing ships against it on its own. Under Volvo Penta's core numbering the exchange unit it belongs to takes part number 3803570, which is the number to quote for the component itself. The line is published with a weight of 2.014 kg, which is a guide to what the old unit injector weighs on its way back rather than to anything that ships out against the deposit. It is one of 6 unit injector cores running through this block, and the published weights sit too close together to identify one, so order the number that matches the unit injector actually coming off.

⚙️ Key Features

• Core deposit line, not a unit injector you can fit
• Belongs with the exchange unit, part number 3803570
• Refunded when the old unit injector is returned
• Listed at 2.014 kg, a guide to what goes back
• One of 6 unit injector cores in this block, not separated by anything published
• Injector and unit injector cores are named loosely in this series, so confirm by the exchange number rather than the name
• Fuel System group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the unit injector itself combines the high-pressure pumping element and the nozzle in one body, raising injection pressure at the cylinder and metering the charge under electronic control.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the unit injector being exchanged
• Hard starting, or uneven running until the engine warms through
• The oil level rising and the oil thinning, from fuel getting past the unit into the sump
• Wear or pitting found on the injector cam lobe, roller or rocker on strip-down
• A sharp rattle or knock from one cylinder, worst at idle and on a cold engine

🛠️ Service Notes

• The charge is refunded when the worn unit injector is returned, so keep the old unit and send it back rather than scrapping it
• Ordering this number on its own supplies no part - it goes on the order beside the exchange unit, part number 3803570
• Prove the wiring, connector and cam follower before condemning a unit injector, and expect the exchange unit to need its setting checked and adjusted on fitting

📦 Condition

• Refundable core deposit - not a physical part