3806953 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 the exchange unit it belongs to takes part number 3803953, which is the number to quote for the component itself. We list that number as an injector, reman. It is one of eighteen injector cores running through this block, and five of those publish no weight at all, so no ranking by mass can be made across the set. Three injector cores in this block read exactly 0.454 kg - this one, 3806935 and 3806948. That figure is one pound to the gram, which makes it a rounded declared weight rather than a measured mass, and it separates the three not at all. The exchange injectors behind them are different parts: 3803935 is listed at 0.308 kg, 3803948 at 0.213 kg and 3803953 at 0.454 kg. Order by the exchange number.

⚙️ Key Features

• Core deposit line, not an injector you can fit
• Belongs with the exchange unit, part number 3803953
• Refunded when the old injector is returned
• Published weight 0.454 kg, exactly one pound
• Shares that weight with injector cores 3806935 and 3806948
• Exchange injector 3803953 also listed at 0.454 kg
• Fuel System group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the injector itself atomises fuel into the combustion chamber at the pressure and timing the engine's fuelling demands.

⚠️ 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
• A rough idle with one cylinder plainly doing less work than the rest
• Black smoke, a smell of unburnt diesel and fuel consumption climbing
• A hard knock or rattle from one cylinder that sharpens as the engine warms
• Back-leakage over specification, or a nozzle found dribbling rather than atomising on test

🛠️ Service Notes

• The charge is refunded when the worn 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 3803953
• Injectors are normally changed as a set, since one new one alongside worn neighbours will not settle the running, and the copper seat washer and clamp fixings should be treated as single-use

📦 Condition

• Refundable core deposit - not a physical part