402418 Valve Cotter | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve cotter from the Engine group, listed for 30 applications across the MD, TMD, D, TD, AQD and TAMD series engines. The build reference published against the row is incomplete.

🚤 Compatibility

• Engine Family: MD, TMD, D, TD, AQD, TAMD, THAMD, TAD
• Serial Range: MO-124039/XXXX

Full model list at the end of this description.

⚙️ Key Features

• Engine group
• Listed for 30 applications across MD, TMD, D, TD, AQD and TAMD series engines
• Published weight is a floor figure and is no guide to size
• Quantity varies by assembly, most commonly 24

🔌 Function

Locks the valve spring retainer onto the valve stem, holding the spring in compression against the valve.

⚠️ Common Signs of Failure

• Tapping or hammering from the valve gear
• Valve dropped or held open, with a dead cylinder
• Cotter faces worn, stepped or fretted
• Groove in the valve stem worn or damaged
• Retainer sitting low or cocked on the stem

🛠️ Service Notes

• Cotters are supplied and worn as pairs, so renew both halves on a valve and never mix an old half with a new one
• Check the valve stem groove and the retainer for matching wear, and confirm the cotters are fully seated before releasing the spring compressor

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D70CHC, D70CRC, D70B
• Volvo Penta MD100A, MD100B, MD100B-CC
• Volvo Penta TD120A, TD120AHC, TD120ARC
• Volvo Penta TD70CHC, TD70CRC, TD70B
• Volvo Penta AQD70B, AQD70BL
• Volvo Penta D100A, D100B
• Volvo Penta MD70B, MD70C
• Volvo Penta TMD70C, TMD70B
• Volvo Penta D120A
• Volvo Penta D42A
• Volvo Penta MD120A
• Volvo Penta TAD120AHC
• Volvo Penta TAMD120A
• Volvo Penta TAMD70B
• Volvo Penta TD100A
• Volvo Penta THAMD70B
• Volvo Penta TMD100A
• Volvo Penta TMD120A