3805458 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 head when the exchange unit is bought, and it comes back once the worn 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 3802458, which is the number to quote for the head itself. The other cylinder head core listed here is 3805459, and nothing published against the two separates them, so order the number that matches the head actually coming off.

⚙️ Key Features

• Core deposit line, not a cylinder head you can fit
• Belongs with the exchange unit, part number 3802458
• Refunded when the old head is returned
• Not separable from cylinder head core 3805459, so order by part number
• Engine group

🔌 Function

As a line item it carries the refundable core charge on the exchange; the head itself closes the top of the cylinders and carries the valves, their seats and guides, and the passages that feed air in and take exhaust out.

⚠️ 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 disappearing with white steam at the exhaust, or oil and coolant mixing
• The header tank pressurising or bubbling at idle
• Compression down on one cylinder, with the gasket letting go again soon after it is renewed
• Cracks found around the valve seats or injector bores once the head is off and cleaned

🛠️ 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 3802458
• Have the old head checked for flatness and cracks before condemning it, renew the head gasket as a matter of course, and use new head bolts where the workshop manual calls for them

📦 Condition

• Refundable core deposit - not a physical part