420875 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat marked Std D, from the Engine group, weighing 0.041 kg and listed for 10 applications across the TAMD, TWD and TD series engines. This is one of the standard-size seats in a four-seat group here.

🚤 Compatibility

Typically suits:

• Volvo Penta TAMD63L-A
• Volvo Penta TWD610V
• Volvo Penta TWD630ME
• Volvo Penta TAMD63P-A
• Volvo Penta TD630ME
• Volvo Penta TD630VE
• Volvo Penta TWD630VE
• Volvo Penta TD640VE
• Volvo Penta TD610M
• Volvo Penta TD610V

• Engine Family: TAMD, TWD, TD

⚙️ Key Features

• Marked Std D — standard size
• 0.041 kg
• 10 applications across the TAMD, TWD and TD series
• 6 used per assembly

🔌 Function

Provides the hardened face in the head that the valve closes onto and seals against.

⚠️ 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 recessed so the valve sinks into the head
• Seat cracked or loose in its recess

🛠️ Service Notes

• Seat 420874 is the other Std D seat at 0.043 kg, and oversize seat 420877 carries exactly this same 0.041 kg — weight separates none of them reliably, so order by part number against the engine's parts list
• Renew the valve with the seat and cut the seat to the manual's angle and width

📦 Condition

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