420877 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta oversize valve seat from the Engine group, weighing 0.041 kg and listed for 7 applications across the TAMD, TWD and TD series engines. The oversize version is for a head whose seat recess has been machined out beyond standard.

🚤 Compatibility

Typically suits:

• Volvo Penta TAMD63L-A
• Volvo Penta TWD630ME
• Volvo Penta TAMD63P-A
• Volvo Penta TD630ME
• Volvo Penta TD630VE
• Volvo Penta TWD630VE
• Volvo Penta TD640VE

• Engine Family: TAMD, TWD, TD

⚙️ Key Features

• Oversize
• 0.041 kg
• 7 applications across the TAMD, TWD and TD series

🔌 Function

Provides the hardened face in the head that the valve closes onto and seals against, in an oversize outside diameter for a recut recess.

⚠️ Common Signs of Failure

• Compression down on one cylinder with hard starting
• Popping or spitting back through the inlet or exhaust
• Seat face burnt, pitted or with a channel cut in it
• Seat loose in its recess or turning
• Seat cracked across the face

🛠️ Service Notes

• This seat and the standard-size seat 420875 carry exactly the same published weight, so weight cannot even tell standard from oversize in this group — order by part number
• Seat 420876 is the other oversize seat at 0.029 kg
• Measure the machined recess before ordering an oversize seat

📦 Condition

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