3183922 Washer | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta washer from the Alternator, Charging, Electric Motor, Electric Drives group, weighing 0.011 kg and listed for two applications across TWD and TD series engines. It supersedes part number 418531.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1010G
• Volvo Penta TD1010G

• Engine Family: TWD, TD

⚙️ Key Features

• 0.011 kg
• Supersedes 418531
• Two applications across TWD and TD series engines
• 4 used per assembly

🔌 Function

Spreads the fastener's load and protects the joint face beneath it.

⚠️ Common Signs of Failure

• Washer dished or crushed by over-tightening
• Corrosion pitting on the seating face
• Fastener working loose
• Marking or scoring of the joint face

🛠️ 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

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3183922 → Supersedes 418531 → Supersedes 403878

OEM / Related Numbers

• 418531 earlier number superseded by this part
• 403878 earlier number superseded by this part

📦 Condition

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