422012 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat in the standard size, from the Engine group, weighing 0.054 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
• 0.054 kg
• 6 published applications on MD, TMD, TD and D engines
• The heavier of the two standard seats listed for these engines

🔌 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 422011 is the 0.039 kg standard seat for the same engines, and weight is the only published difference between the two — measure your counterbore and order by part number
• Chill the seat and warm the head to fit rather than driving it in cold
• Recut the seat to the specified angle and width once fitted

📦 Condition

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