3806965 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 3803965, which is the number to quote for the component itself. That number is not one we list ourselves, so nothing is held against it here. It is one of ten cylinder head cores running through this block, all named alike and none of them carrying a fitment list, so the paired exchange number is the only thing that separates them - order the one that matches the head actually coming off. The deposit line carries a published weight of 72.574 kg, which is 160 pounds to the gram. That is a substantial casting - arrange lifting rather than trying to handle it off the engine by hand. 3803965 is not a number we list ourselves, so the exchange head would have to be ordered in against it.

⚙️ Key Features

• Core deposit line, not a cylinder head you can fit
• Belongs with the exchange unit, part number 3803965
• Refunded when the old cylinder head is returned
• Published weight 72.574 kg, exactly 160 lb
• Exchange head 3803965 not listed by us
• Heavy enough to need lifting gear
• 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 external leak to be found, or an emulsion like mayonnaise under the oil filler cap
• Bubbling and pressure in the header tank, and the engine running hotter than it used to
• Compression down on a cylinder, with hard starting, a misfire and smoke
• On strip-down, a bowed or eaten head face, cracks between the valve seats, or coolant passages corroded through

🛠️ 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 3803965
• Have the old head checked for flatness and cracks before it is condemned, since a skimmable head and a failed head 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