991994 Washer | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta washer weighing 0.091 kg and listed for 18 applications across the D series. It sits apart from the washer group 991658, 991659 and 991660 in this run, which share a six-series fitment across the IPS, D, V, DPH, DPI and DPR engines. No inside or outside diameter is published for any of them, so match on the application list and the number.

🚤 Compatibility

Typically suits:

• Volvo Penta D12C-A MP
• Volvo Penta D12D-A MH
• Volvo Penta D12D-A MP
• Volvo Penta D12D-B MH
• Volvo Penta D12D-B MP
• Volvo Penta D12D-C MH
• Volvo Penta D12D-C MP
• Volvo Penta D12D-D MP
• Volvo Penta D12D-E MH
• Volvo Penta D12D-E MP
• Volvo Penta D12D-F MP
• Volvo Penta D12D-G MH
• Volvo Penta D12D-G MP
• Volvo Penta D12D-H MP
• Volvo Penta D8A5-A MH
• Volvo Penta D8A6-A MH
• Volvo Penta D8A1-A MP
• Volvo Penta D8A3-A MP

• Engine Family: D

⚙️ Key Features

• 0.091 kg
• 18 applications across the D series
• No published inside or outside diameter
• Separate from the 991658 / 991659 / 991660 washer group

🔌 Function

Spreads the fastener's clamping load over the mating face and protects it from being scored as the fastener turns.

⚠️ Common Signs of Failure

• Joint working loose or the fastener bedding into the mating face
• Washer dished, cupped or distorted
• Bearing face bruised, bright or fretted
• Corrosion or pitting through the washer

🛠️ Service Notes

• Check you are fitting the same type of washer that came out — plain, hardened, sealing and locking washers are not interchangeable, and the wrong one either fails to seal or fails to hold
• Treat sealing washers on fuel, oil and coolant unions as single-use; they seal by deforming onto the faces, so a used one will not seal reliably a second time
• Clean the seating faces and make sure the washer sits flat and square, fully under the head or nut, before tightening — a washer trapped on a chamfer or edge will crush unevenly
• Tighten the fastener to the figure given in the workshop manual for your engine, and account for every washer on reassembly so none is left loose inside a housing or the engine bay

📦 Condition

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