3804666 Short Block Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a shortblock, in the Engine group. It is the refundable charge raised against the old shortblock when the exchange unit is bought, and it comes back once the worn shortblock 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 3801666, which is the number to quote for the exchange unit itself. The other shortblock core running through this block is 3804667, and nothing published against the two separates one from the other, so order the number that matches the shortblock actually coming off.

⚙️ Key Features

• Core deposit line, not a shortblock you can fit
• Pairs with part 3801666, the exchange unit it belongs to
• Refunded when the old shortblock is returned
• Not separable from shortblock core 3804667, so order by part number
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the shortblock itself is the cylinder block with crankshaft, pistons and connecting rods fitted, supplied without the head and valve gear so those transfer across from the old engine.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the shortblock being exchanged
• Knocking from the bottom end under load, or a rumble that rises with engine speed
• Oil pressure low and dropping further as the engine warms
• Blue smoke at the exhaust with heavy blow-by at the breather
• On strip-down, scored bores, worn bearing shells and a crankshaft past its regrind limits

🛠️ Service Notes

• The charge is refunded when the worn shortblock 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 3801666
• A shortblock covers the block, crankshaft, pistons and rods only, with the head and valve gear transferring across, so check which build is being exchanged - the longblock and complete engine cores in this block cover more of the engine.

📦 Condition

• Refundable core deposit - not a physical part