3806031 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 3803031, which is not a number we carry ourselves, so ask us to look the exchange unit up before you order against it. It shares its published weight of 34.0 kg with 3806023, so the figure will not tell them apart and the deposit has to be ordered by the number of the head coming off. The twenty-one cylinder head cores in this block run from 9.2 kg to 36.8 kg, so the published figure is a quick check that the number matches the head in front of you, and the old head going back is a two-person lift and a freight item rather than a parcel.

⚙️ Key Features

• Core deposit line, not a cylinder head you can fit
• Belongs with the exchange unit, part number 3803031
• Refunded when the old cylinder head is returned
• Published at 34.0 kg
• Weight shared with 3806023, so order by part number

🔌 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 the injector bores, sealing combustion while coolant and gas pass through its galleries.

⚠️ 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
• Overheating that comes straight back as soon as the engine is put under load
• A sweet smell and white smoke at the exhaust, with the coolant level dropping between runs
• A misfire or low compression on a single cylinder that a gasket change does not cure
• On strip-down, corrosion around the injector bores, pitted seats, and a face that will not clean up inside its skim limit

🛠️ 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 is the deposit that rides beside the exchange unit, part number 3803031, which we do not list ourselves, so ask us to look it up before ordering
• 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