21403117 Kit FWC | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 8.1L Freshwater Cooling Conversion Kit - Part Number: 21403117

A genuine Volvo Penta freshwater-cooling conversion package for selected 8.1-litre petrol engines. The kit converts the specified raw-water-cooled installation to a closed coolant circuit while retaining raw water for heat-exchanger and exhaust cooling. The conversion increases overall engine length by approximately 15mm and must be installed to the Volvo accessory instructions.

Kit Contents:

• 1 × complete Volvo Penta freshwater-cooling conversion package - 21403117

• 1 × heat-exchanger / coolant-circuit assembly - serviced within kit 21403117

• 1 × expansion and fill arrangement - serviced within kit 21403117

• Coolant hoses and formed connections - serviced within kit 21403117

• Mounting brackets, clamps, sealing rings and installation hardware - serviced within kit 21403117

• Individual internal component numbers are configuration-controlled and are not published as a universal kit breakdown

⚙️ Key Features

• Genuine Volvo Penta closed-cooling conversion

• Correct Volvo Penta part number 21403117

• Protects the engine block with a controlled freshwater / coolant circuit

• Retains raw-water cooling through the heat exchanger and exhaust system

• Designed specifically for listed 8.1-litre Gi / GiCE engine variants

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21403117 current freshwater-cooling accessory-kit reference

OEM / Related Numbers:

• 21403117

• VOE21403117

• 8.1 Gi / GiCE freshwater-cooling accessory

Aftermarket / Verified Equivalents:

• Monitor Products: application-matched 8.1L GM marine closed-cooling systems

• San Juan Engineering: application-matched 8.1L GM marine closed-cooling systems

🚤 Compatibility

Commonly used on:

• Volvo Penta 8.1-litre petrol sterndrive and inboard installations

• Factory accessory conversions requiring Volvo kit 21403117

Typically suits:

• Engine models:

• 8.1 GiC-400-J

• 8.1 GiC-400-JF

• 8.1 GiC-400-Q

• 8.1 GiCE-400-J

• 8.1 GiCE-400-JF

• 8.1 GiCE-400-M

• 8.1 GiCE-400-MF

• 8.1 GiCE-400-P

• HP Range: Approximately 400HP

• Engine Type: Volvo Penta 8.1L GM-based V8 petrol marine engine

• Year Range: Approximately late 2000s - mid-2010s

• Serial Range: Engine-variant and cooling-system controlled; confirm the complete model suffix and engine serial number

🔌 Function

The kit separates the engine's internal coolant from seawater. Coolant circulates through the block and heads, then transfers heat to raw water in the heat exchanger before the raw water is discharged through the exhaust.

Common signs of failure:

• Coolant or seawater leakage after conversion

• Engine overheating because of trapped air or restricted flow

• Incorrect thermostat or hose routing

• Heat-exchanger fouling or coolant contamination

• Expansion-tank level changes caused by an improperly sealed circuit

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging