477667 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat from the Engine group in the oversize version, marked Over size, weighing 0.039 kg and listed for 16 applications across TWD, TD, TAMD and TAD series engines. It is the lighter of the two oversize seats here, with 477658 at 0.050 kg, and the standard seats are 477657 and 477659.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD730ME
• Volvo Penta TWD731VE
• Volvo Penta TWD740GE
• Volvo Penta TWD740VE
• Volvo Penta TD730ME
• Volvo Penta TD730VE
• Volvo Penta TAMD75P-A
• Volvo Penta TAMD74P-A
• Volvo Penta TAMD74P-B
• Volvo Penta TAD740GE
• Volvo Penta TAD741GE
• Volvo Penta TAMD74A
• Volvo Penta TAMD74C-A
• Volvo Penta TAMD74C-B
• Volvo Penta TAMD74L-A
• Volvo Penta TAMD74L-B

• Engine Family: TWD, TD, TAMD, TAD

⚙️ Key Features

• Oversize version, marked Over size
• 0.039 kg, the lighter of the two oversize seats against 477658 at 0.050 kg
• 16 applications across TWD, TD, TAMD and TAD engines
• Standard equivalents are 477657 and 477659

🔌 Function

Forms the hardened ring the valve seals against in the cylinder head, closing the combustion chamber and conducting heat away from the valve.

⚠️ Common Signs of Failure

• Compression loss with hard starting and a misfire
• Hissing from the inlet or exhaust at cranking
• Seat face burnt, pitted or recessed
• Seat loose in its machined recess
• Valve head or stem heat damaged

🛠️ Service Notes

• Only fit oversize once the head recess is machined to suit, and measure before ordering
• The published details do not identify inlet against exhaust for the two oversize seats, so order by number after measuring
• Cutting the seat and checking valve recession is machine shop work

📦 Condition

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