11110208 Expansion Tank | Genuine Volvo Penta Part

🔧 Product Description

This is the Volvo Penta expansion tank from the engine cooling system group, serving as the coolant reservoir and fill point for the fresh-water circuit. It accommodates coolant expansion as the engine heats up and returns it to the system as temperatures drop, maintaining correct coolant level and system pressure. It is the current replacement for the earlier 3830974 and 4804536 tanks and fits TAMD63, TAMD74, TAMD75 and TD/TID/TWD 600 and 700 series engines.

🚤 Compatibility

Typically suits:

• Volvo Penta TAMD63L-A
• Volvo Penta TWD731VE
• Volvo Penta TWD740VE
• Volvo Penta TID71A
• Volvo Penta TAMD63P-A
• Volvo Penta TD730VE
• Volvo Penta TD71A
• Volvo Penta TD630VE
• Volvo Penta TWD630VE
• Volvo Penta TD640VE
• Volvo Penta TD610V
• Volvo Penta TAMD75P-A
• Volvo Penta TAMD74P-A
• Volvo Penta TAMD74P-B
• Volvo Penta TAMD74A
• Volvo Penta TAMD74C-A
• Volvo Penta TAMD74C-B
• Volvo Penta TAMD74L-A
• Volvo Penta TAMD74L-B

• Engine Family: TAMD, TWD, TID, TD
• Year Range: Approximately 1980s-2000s, cooling-package controlled

⚙️ Key Features

• OEM Volvo Penta part number 11110208
• System group: Cooling System
• Net weight approximately 0.74 kg
• Supersedes and replaces earlier part numbers 3830974 and 4804536
• Fits TAMD63, TAMD74, TAMD75 and TD, TID and TWD 600/700 series marine and industrial diesel engines
• Engine type: Volvo Penta marine and industrial diesel

🔌 Function

The expansion tank holds reserve coolant and absorbs the volume change of the fresh-water circuit as engine temperature rises and falls. It provides the system fill and level-check point and helps keep the cooling circuit free of trapped air.

⚠️ Common Signs of Failure

• Coolant seepage, staining or drips around the tank body, seams or hose connections
• Cracking, crazing or distortion of the tank from age, heat cycling or over-pressurisation
• Persistent coolant loss with repeated top-ups and no other visible leak source
• Coolant level that will not hold steady, or air continually returning to the cooling circuit
• Engine running hotter than normal or high-temperature alarms caused by low coolant volume

🛠️ Service Notes

• Check the level cold with the engine stopped, and fill to between the level marks where the tank has them, or to the level given in the workshop manual for your engine — an overfilled system simply pushes coolant out past the cap as it warms
• Use the coolant type and mix specified for your engine and top up with the same; mixing coolant types can destroy the corrosion protection the whole cooling system depends on
• Inspect the tank for hairline cracks, crazing and staining around the seams and the hose spigots, and check the hoses and clips while you are there
• Check the cap seal and that the cap both relieves and draws back properly — a cap that will not vent empties the tank, and one that will not let coolant return collapses a hose
• Never release the cap on a hot pressurised system; let it cool first, and bleed and refill the system as the manual for your engine describes after any work

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 11110208 → Supersedes 3830974

OEM / Related Numbers

• 4804536 earlier number superseded by this part
• 3830974 earlier number superseded by this part
• 9445462 related pressure cap
• 3830969 related T-nipple
• 4804563 related tensioning band

Aftermarket / Verified Equivalents

• SLP / TAMD Parts: EPL-778
• Orbitrade: replacement expansion tank for 11110208 / 4804536
• Olsson Parts: 41128
• Marinexpress: EPT-208
• SLP: EPT-208

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging