20451181 Cylinder Block | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta cylinder block from the Engine group, weighing 323.865 kg and listed for 27 fitments across the D, TWD and TAD series. It supersedes 20412465 and 8170120. This is the bare casting that carries the bores, the crankshaft supports and the internal oil and coolant galleries.

🚤 Compatibility

• Engine Family: D, TWD, TAD

Full model list at the end of this description.

⚙️ Key Features

• Cylinder block casting
• 323.865 kg
• Engine group
• Supersedes 20412465 and 8170120
• Listed for 27 fitments across the D, TWD and TAD series

🔌 Function

Forms the engine's primary structure, carrying the cylinder bores, the crankshaft main bearing supports and the internal oil and coolant passages.

⚠️ Common Signs of Failure

• Cracks, frost damage or impact damage visible in the casting
• Coolant in the oil or oil in the coolant with no head gasket fault found
• Main bearing bores worn, picked up or out of line after a seizure
• Liner seats or deck face eroded, pitted or corroded beyond machining
• Stripped main threads or damaged dowel locations found during overhaul

🛠️ Service Notes

• Supplied as the bare block - liners, bearings, plugs, dowels and studs are separate numbers and need ordering alongside it
• At 323.865 kg this is a lifting-gear and freight item rather than a counter collection, so arrange handling before it arrives

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20451181 → Supersedes 20412465 → Supersedes 8130120

OEM / Related Numbers

• 8170120 earlier number superseded by this part
• 20412465 earlier number superseded by this part
• 8130120 earlier number superseded by this part
• 8170121 - Related D12 cylinder-block reference
• 422426 - Locating pin
• 1547040 - Flange screw

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D12C-A MP, D12D-A MG, D12D-A MH, D12D-A MP, D12D-B MH, D12D-B MP, D12D-C MH, D12D-C MP, D12D-D MP, D12D-E MG, D12D-E MH, D12D-E MP, D12D-F MP, D12D-G MH, D12D-G MP, D12D-H MP
• Volvo Penta TAD1241GE, TAD1241VE, TAD1241-42VE
• Volvo Penta TAD1242GE, TAD1242VE
• Volvo Penta TAD1250VE, TAD1250-52VE
• Volvo Penta TAD1240GE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TWD1240VE