991057 Nipple | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta nipple for the reverse gear, weighing 0.091 kg and listed for 46 applications across the D series. The reverse-gear note is what separates it from the other nipples in this run — 991970 carries the same 0.091 kg published weight but is listed for a single TWD application, so weight is no guide here.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• For the reverse gear
• 0.091 kg
• 46 applications across the D series
• Shares its published weight with the TWD nipple 991970 — order by number
• Quantity varies by assembly, most commonly one

🔌 Function

Forms a threaded union between a line and its port so fluid can pass from one to the other without leaking.

⚠️ Common Signs of Failure

• Weeping, misting or dripping at the union
• Thread damaged, cross-started or corroded
• Sealing taper or cone face nicked or scored
• Nipple cracked or split at the hex

🛠️ Service Notes

• Check the mating flare or cone in the housing while the nipple is out — a scored seat leaks again straight away with a new fitting

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C3-B MH, D13C1-B MH, D13C3-A MP, D13C4-A MP, D13B-L MP, D13B-E MG, D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-N MH, D13B-N MH (FE), D13B-D MP, D13B-M MP, D13B-C MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C5-A MP, 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 D12D-A MP, D12D-B MH, D12D-C MH, D12D-C MP, D12D-G MP, D12D-H MP
• Volvo Penta D8A5-A MH, D8A6-A MH, D8A4-A MP, D8A3-A MP
• Volvo Penta D11C3-A MP, D11B3-A MP