21344774 Flange Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta injector hold-down flange screw used on D12-family engines. It clamps the injector bridge or hold-down component at the specified preload; incorrect torque, reused stretched hardware or contaminated threads can cause combustion leakage and injector movement.

🚤 Compatibility

• Engine Family: D, TAD, TWD
• Serial Range: SN-2016012492

Full model list at the end of this description.

⚙️ Key Features

• For engines up to serial number 2016012492
• Injector hold-down flange screw for D12-family engines
• 0.041 kg
• Supersedes 20741747 and 8131597
• Listed for 87 applications across the D, TAD and TWD ranges
• Quantity varies by assembly, most commonly six

🔌 Function

Clamps the injector bridge or hold-down at the specified preload, holding the injector down against combustion pressure.

⚠️ Common Signs of Failure

• Rhythmic hiss or puff at the injector under load, with soot around its seat
• Rough running or a misfire on one cylinder
• Combustion smell in the coolant or oil where the injector seal has been breached
• Screw found stretched or the thread found contaminated and galled
• Injector seat and hold-down faces found sooted and marked on strip-down

🛠️ Service Notes

• It is listed for engines up to serial number 2016012492, and replaces 20741747 and 8131597 - check the engine serial before ordering
• Clean the threads and hold-down faces before fitting; contamination or a reused stretched screw lets the injector move and the combustion seal leak
• Flange screw 21344756 shares the same 0.041 kg listed weight, so order by the illustrated position rather than by weight

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21344774 → Supersedes 20741747

OEM / Related Numbers

• 8131597 earlier number superseded by this part
• 20741747 earlier number superseded by this part

📦 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, D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C4-B MP, 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 D11C2-A MP, D11B3-A MP, D11B4-A MP, D11B2-A MP, D11B1-A MP
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
• Volvo Penta D9A2L MH, D9A2M MP
• Volvo Penta TAD1250VE, TAD1250-52VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD1140-42VE
• Volvo Penta TAD1150-52VE
• Volvo Penta TAD1170-72VE
• Volvo Penta TAD1180-83VE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TAD1341-43GE-B
• Volvo Penta TAD1344-45GE-B
• Volvo Penta TAD1345VE
• Volvo Penta TAD1346GE
• Volvo Penta TAD1351-53VE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1380-82GE
• Volvo Penta TAD1381-85VE
• Volvo Penta TAD1384-85VE-IWP
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1683VE