20450468 Overflow Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta overflow valve from the Fuel System group, weighing 0.107 kg and listed for 44 applications across the D, TWD and TAD series. It supersedes part number 20430692, which was catalogued as a plain hollow screw, so an engine built to the earlier number carried a drilled banjo bolt in this position rather than a pressure-holding valve. It controls return flow from the fuel gallery and holds the intended supply pressure.

🚤 Compatibility

• Engine Family: D, TWD, TAD

Full model list at the end of this description.

⚙️ Key Features

• 0.107 kg
• 44 applications across the D, TWD and TAD series
• Supersedes 20430692, previously catalogued as a hollow screw
• Fuel System group

🔌 Function

Controls return or overflow flow in the fuel circuit and helps maintain the intended supply pressure.

⚠️ Common Signs of Failure

• Hard starting or a long crank after the engine has stood
• Rough running or power loss under load from low fuel supply pressure
• Fuel pressure reading below specification with a clean filter fitted
• Valve found stuck open, or its seat pitted and worn on removal
• Excessive return flow to tank when the return line is checked

🛠️ Service Notes

• The superseded number was a plain hollow screw, so confirm whether the engine was built with a drilled banjo bolt or this pressure-holding valve
• Check for air leaks on the suction side and a restricted return line before condemning the valve for low fuel pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20450468 → Supersedes 20430692

OEM / Related Numbers

• 20430692 earlier number superseded by this part

Aftermarket / Verified Equivalents

• Auger: 81083
• DT Spare Parts: 2.12370
• Febi Bilstein: 106873
• Laso: 98091503
• Sampa: 092.342
• Air Fren: 14.5000.12
• Ayberg: 20 020302 73

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP, D11B3-A MP, D11B4-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP, D11A-C (IPS), D11B1-A MP
• Volvo Penta D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
• Volvo Penta TAD1641GE, TAD1641VE
• Volvo Penta TAD1642GE, TAD1642VE
• Volvo Penta TAD940GE, TAD940VE
• Volvo Penta TAD941VE, TAD941GE
• Volvo Penta TAD1640GE
• Volvo Penta TAD1643VE
• Volvo Penta TAD942VE
• Volvo Penta TAD943VE
• Volvo Penta TAD950VE
• Volvo Penta TAD951VE
• Volvo Penta TAD952VE
• Volvo Penta TWD1643GE