3804661 Injector Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for an injector, in the Fuel System group. It is the refundable charge raised against the old injector when the exchange unit is bought, and it comes back once the worn 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 it pairs with part 3801661, which is the number to quote for the component itself and which our own range lists as Injector Reman. The other injector cores running through this block are 3804624 and 3804627, and nothing published against them separates one from another, so order the number that matches the injector actually coming off. Both wordings appear in this block - injector cores 3804624, 3804627 and 3804661 alongside unit injector cores 3804617, 3804618 and 3804652 - and the core-side naming is not always precise, so work from the paired number rather than the wording.

⚙️ Key Features

• Core deposit line, not an injector you can fit
• Pairs with part 3801661, listed as Injector Reman
• Refunded when the old injector is returned
• Not separable from injector cores 3804624 and 3804627, so order by part number
• Fuel System group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the injector itself atomises the fuel delivered to it and sprays it into the combustion chamber, sealing against cylinder pressure between injections.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the injector being exchanged
• Rough running with a knock or a misfire traced to one cylinder
• Black smoke at the exhaust and a smell of unburnt diesel around the engine
• Hard starting, and an idle that hunts once the engine is hot
• On removal, a nozzle that dribbles rather than spraying cleanly, with coked spray holes and a sooty ring at the seat

🛠️ Service Notes

• The charge is refunded when the worn injector is returned, so keep the old unit and arrange the return collection when the order is placed rather than scrapping it
• Ordering this number on its own supplies no part - it goes on the order beside the exchange unit, part number 3801661
• Renew the seat washer and the O-rings on refitting, and prove the fuel is clean before the exchange unit goes in, since dirt or water will take the next one out as well.

📦 Condition

• Refundable core deposit - not a physical part