3801790 Piston Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta REMANUFACTURED piston kit, supplied on an exchange basis and weighing 2.07 kg. It is not a new kit: the unit is rebuilt to Volvo Penta specification, and a core deposit is charged alongside it and refunded when the old parts are returned. The core deposit for this kit is listed separately as 3804790. It supersedes part number 3801756. Piston kit 3801757 is the near-twin at 2.04 kg, and with 29 grams between them the part number is the only reliable guide.

⚙️ Key Features

• Supersedes 3801756
• 2.07 kg
• Piston with rings and pin as a kit
• Only 29 grams heavier than 3801757
• Remanufactured unit, supplied on an exchange basis
• Core deposit 3804790 charged and refunded on return of the old unit

🔌 Function

Supplies the piston with its rings and pin, sealing the combustion chamber and passing gas pressure down to the connecting rod.

⚠️ Common Signs of Failure

• Blue smoke and rising oil consumption
• Compression down and hard starting
• Piston slap or knock when cold
• Scored skirts and worn ring grooves on strip-down
• Crankcase pressure forcing oil out of the breather

🛠️ Service Notes

• This is a remanufactured exchange unit, not a new part
• A core deposit is charged with the order and refunded when the old unit is returned - the deposit is listed under its own part number 3804790
• Return the old unit complete and drained; a stripped or incomplete core can forfeit the deposit
• Confirm the exact engine specification and market designation before ordering
• 3801757 supersedes 23083960 instead, so check which old number your engine's history carries before choosing between the two kits
• Measure and hone the bore before fitting, and renew the connecting rod hardware where it is specified as single-use

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3801790 → Supersedes 3801756

OEM / Related Numbers

• 3801756 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta remanufactured unit
• Supplied on an exchange basis
• A core deposit is charged and refunded when the old unit is returned