421316 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat in the 0.20 mm oversize, from the Engine group, weighing 0.036 kg and listed for 35 applications across the D, TD, AQD, TMD, TWD and TID series.

🚤 Compatibility

• Engine Family: D, TD, AQD, TMD, TWD, TID, TAMD, MD, THAMD

Full model list at the end of this description.

⚙️ Key Features

• 0.20 mm oversize
• 0.036 kg
• 35 applications across six engine series
• For heads with a recut counterbore

🔌 Function

Provides the hardened ring in the cylinder head that the valve face closes against, in an oversize for a head whose counterbore has been machined out.

⚠️ Common Signs of Failure

• Compression loss on one cylinder after a previous seat repair
• Burnt or pocketed seating face
• Seat loose in an already oversized counterbore
• Valve recession closing up the clearances
• Cracking from the counterbore into the head

🛠️ Service Notes

• Valve seat 421011 is the standard size for the same engines — order this one only once the counterbore has been machined to the oversize
• Confirm the actual counterbore diameter before ordering, as it is the machining and not the engine model that decides which seat fits
• The 0.20 mm oversize seat weighs slightly less than the standard seat, so weight is no guide to which is which

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta AQD70B, AQD70BL, AQD70CL, AQD70D, AQD70C
• Volvo Penta TD70CHC, TD70CRC, TD70G, TD70B, TD70G-83
• Volvo Penta TAMD70B, TAMD70E, TAMD70C, TAMD70D
• Volvo Penta TWD710G, TWD710P, TWD710PB, TWD710V
• Volvo Penta D70CHC, D70CRC, D70B
• Volvo Penta MD70B, MD70C
• Volvo Penta TAMD71B, TAMD71A
• Volvo Penta THAMD70C, THAMD70B
• Volvo Penta TMD70C, TMD70B
• Volvo Penta D45BPP
• Volvo Penta TD45B
• Volvo Penta TD71A
• Volvo Penta TD710G
• Volvo Penta TID70G
• Volvo Penta TID71A