3804428 Cylinder Head Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for a Volvo Penta cylinder head, from the Engine group. It is an accounting line rather than a fittable part: the refundable charge raised against the old cylinder head when a replacement is supplied on exchange, credited back once that worn unit is returned. Ordering it supplies nothing in itself. It is raised against unit 3801428. Core numbers in this series run three thousand above the unit they belong to, so the deposit and the unit are read as a pair.

⚙️ Key Features

• Refundable core deposit on a cylinder head, not a fittable part
• Credited back on return of the old cylinder head
• Pairs with unit 3801428, three thousand below this core number

🔌 Function

Holds the refundable deposit raised against the old cylinder head when a replacement is bought on exchange, and releases it as a credit when that unit is returned. It does no mechanical work. The cylinder head itself closes the top of the cylinders and carries the valves, seats and ports the engine breathes through.

⚠️ 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 external leak, or white steam at the exhaust
• The header tank bubbling as combustion gas pressurises the cooling system
• Hard starting with compression down on one or two cylinders
• Cracking between the valve seats, or a face that will not clean up within limits

🛠️ Service Notes

• The deposit is refunded when the old cylinder head is sent back, so return it complete and as it came off - the credit depends on the core being fit to rebuild, and a stripped or broken-up unit can lose it
• Ordering this line on its own supplies no part. It has to go on the order alongside unit 3801428, which is the item that actually ships

📦 Condition

• Refundable core deposit - not a physical part