477659 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat from the Engine group in the standard size, marked Std, weighing 0.045 kg and listed for 24 applications across TWD, TID, TD, TAMD and TAD series engines. It is the heavier of the two standard seats here, with 477657 at 0.034 kg, and the oversize seats are 477658 and 477667.

🚤 Compatibility

• Engine Family: TWD, TID, TD, TAMD, TAD

Full model list at the end of this description.

⚙️ Key Features

• Standard size, marked Std
• 0.045 kg, against 0.034 kg for the other standard seat 477657
• 24 applications across TWD, TID, TD, TAMD and TAD engines
• Oversize equivalents are 477658 and 477667

🔌 Function

Forms the hardened ring the valve seals against in the cylinder head, closing the combustion chamber and drawing heat out of the valve.

⚠️ Common Signs of Failure

• Loss of compression with hard starting and reduced power
• Hiss back through the inlet or exhaust at cranking
• Seat face pitted, burnt or recessed into the head
• Seat loose or dropped in its recess
• Valve head burnt or seat width out of specification

🛠️ Service Notes

• Measure the head recess and decide between standard and the oversize seats 477658 and 477667 before ordering
• The published details do not identify inlet against exhaust for the two standard seats, so order by number after measuring
• Renew or reface the valves and check the seat width and valve recession after the seats are cut

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TD71A, TD71ACE, TD71AW
• Volvo Penta TAD730G, TAD730V
• Volvo Penta TD730ME, TD730VE
• Volvo Penta TWD740GE, TWD740VE
• Volvo Penta TAD740GE
• Volvo Penta TAD741GE
• Volvo Penta TAMD75P-A
• Volvo Penta TD710G
• Volvo Penta TID71A
• Volvo Penta TWD710G
• Volvo Penta TWD730ME
• Volvo Penta TWD731VE