3804804 Cylinder Head Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a cylinder head, in the Engine group. It is the refundable charge raised against the old cylinder head when the exchange unit is bought, and it comes back once the worn cylinder head 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 3801804. We list that number simply as a cylinder head, with no exchange or remanufactured wording against it. It is one of 5 cylinder head cores running through this block, and nothing published against them separates one from another, so order the number that matches the cylinder head actually coming off rather than working from the description. It carries a published weight of 262.5 kg, which is the mass of the head itself and puts it among the largest in the range, so plan for mechanical handling when the old one comes off.

⚙️ Key Features

• Core deposit line, not a cylinder head you can fit
• Belongs with the exchange unit, part number 3801804
• Refunded when the old cylinder head is returned
• Not separable from the other cylinder head cores here, so order by part number
• Published weight 262.5 kg - among the heaviest heads in the range, needs mechanical handling
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the cylinder head itself closes the top of the bores and carries the valves and their seats, with the coolant and oil galleries running through it.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the cylinder head being exchanged
• Coolant vanishing with no leak to be found, or an emulsion under the oil filler cap
• Bubbles and pressure in the header tank, and an engine that runs hot
• Compression down on one cylinder, with hard starting and smoke
• On strip-down, a bowed or eaten head face, cracks between the valve seats, or corroded coolant passages

🛠️ Service Notes

• The charge is refunded when the worn cylinder head 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 3801804
• Have the old head checked for flatness and cracks before it is condemned, since a skimmable head and a failed gasket give the same symptoms, and treat the head bolts as single-use when the exchange head goes on

📦 Condition

• Refundable core deposit - not a physical part