422011 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat in the standard size, from the Engine group, weighing 0.039 kg and listed for 6 applications across the MD, TMD, TD and D series.

🚤 Compatibility

Typically suits:

• Volvo Penta MD100A
• Volvo Penta MD100B
• Volvo Penta TMD100A
• Volvo Penta TD100A
• Volvo Penta D100A
• Volvo Penta MD100B-CC

• Engine Family: MD, TMD, TD, D

⚙️ Key Features

• Standard size, not an oversize
• 0.039 kg
• 6 published applications on MD, TMD, TD and D engines
• Narrow fitment compared with the widely used seat 421011

🔌 Function

Provides the hardened ring in the cylinder head that the valve face closes against to seal the combustion chamber.

⚠️ Common Signs of Failure

• Compression loss on one cylinder, with hard starting
• Burnt or pocketed seating face
• Valve recession, so clearances close up between services
• Seat loose or sunk in its counterbore
• Cracks running from the seat into the head

🛠️ Service Notes

• Valve seat 422012 is the heavier standard seat for the same four engine series, so the pair are separated by size and not by name — order by part number
• Valve seat 421011 shares this weight and the standard designation but covers 66 applications, so do not substitute on weight
• Cut the seat and lap the valve as a pair after fitting

📦 Condition

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