3804703 Longblock Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a longblock, in the Engine group. It is the refundable charge raised against the old longblock when the exchange unit is bought, and it comes back once the worn longblock 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 3801703, which is the number to quote for the component itself. It is one of 6 longblock cores running through this block, and nothing published against them separates one from another, so order the number that matches the longblock actually coming off rather than working from the description. It is not the same item as the shortblock cores 3804743 and 3804744, which stop below the cylinder head, nor as the complete engine cores in the same block.

⚙️ Key Features

• Core deposit line, not a longblock you can fit
• Belongs with the exchange unit, part number 3801703
• Refunded when the old longblock is returned
• Not separable from the other longblock cores here, so order by part number
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the longblock itself is the block, crankshaft, pistons and cylinder head built up as one assembly, supplied for the ancillaries, injection equipment and manifolds to be moved 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 longblock being exchanged
• Knocking or rumbling from the bottom end that gets worse as the oil warms through
• Oil pressure low when hot, or the warning lamp flickering at idle
• Heavy breathing from the crankcase, blue smoke and oil consumption climbing
• On strip-down, scored bores, picked-up or copper-showing bearing shells and metal in the oil filter

🛠️ Service Notes

• The charge is refunded when the worn longblock 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 3801703
• Strip the manifolds, injection equipment and ancillaries off the old unit before it goes back, and keep the block complete otherwise, since a stripped or broken core can be refused

📦 Condition

• Refundable core deposit - not a physical part