21088049 Overflow Valve | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta calibrated fuel overflow valve used in the low-pressure fuel circuit on selected TAD13 generator and industrial engines. Installed with the specified hollow screw and sealing rings, it maintains fuel-gallery backpressure and meters excess fuel into the return circuit.

🚤 Compatibility

• Engine Family: D, TAD

Full model list at the end of this description.

⚙️ Key Features

• Calibrated fuel-return pressure valve for the TAD13 fuel system
• Maintains stable low-pressure supply to the unit-injector circuit
• Banjo-style installation with hollow screw 978197
• Works with sealing rings and fuel hoses specified in the original schematic
• Valve only; hollow screw, seals and hoses are separate
• Engine type: Volvo Penta 12.8-litre inline six-cylinder industrial diesel
• Also supersedes Volvo part numbers 21550182, 21739768 and 22040313

🔌 Function

Regulates return flow so the low-pressure fuel gallery retains the pressure required for reliable filling, cooling and purging of the injector supply circuit.

⚠️ Common Signs of Failure

• Long cranking or difficult hot starting
• Low fuel-supply pressure and unstable idle
• Excessive fuel return flow
• Leakage at the valve, hollow screw or sealing rings

🛠️ Service Notes

• Treat it as a sealed, non-adjustable unit — renew it rather than attempting to clean, shim or adjust the internals
• Work clean: cap the openings, wipe the area down before opening the fuel system, and do not let dirt or fibres into the fuel side while the valve is off
• Renew the sealing washers, O-rings or gasket that come with the valve, and never reuse a crushed copper or aluminium washer
• Tighten to the figure in the workshop manual for your engine; these valves screw into fuel housings and heads that strip readily
• Bleed and prime the fuel system as the manual for your engine describes, then run the engine and check the joint for weeping under working pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21088049 → Supersedes 22037732

OEM / Related Numbers

• Hollow screw 978197
• Fuel hose 21354197
• Sealing ring 20852764

Other-Brand OEM Numbers

• VOE21088049

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C4-B MH, D13C1-B MH, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-A MP, D13B-H MP, D13B-G MP, D13B-L MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-K MP, D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-M MP, D13B-C MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C5-A MP, D13C2-A MG, D13C1-A MG
• Volvo Penta D16C-A MG, D16C-A MH, D16C-B MH, D16C-C MH, D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C-D MH, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
• Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
• Volvo Penta TAD1342VE, TAD1342GE
• Volvo Penta TAD1343VE, TAD1343GE
• Volvo Penta TAD1345GE, TAD1345VE
• Volvo Penta TAD1350GE, TAD1350VE
• Volvo Penta TAD1340VE
• Volvo Penta TAD1346GE
• Volvo Penta TAD1351GE
• Volvo Penta TAD1352GE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1354GE
• Volvo Penta TAD1355GE
• Volvo Penta TAD1360-62VE
• Volvo Penta TAD1363-65VE