858461 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta valve seat weighing 0.018 kg and listed for 23 applications in the D series. The source publishes no size marking for it, and it shares its 0.018 kg weight with the 0.20 mm oversize seat 858332 - so the published figures do not separate them. Identify the seat by the fitment list and the part number, and measure the counterbore in the head before ordering.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• 0.018 kg
• 23 applications in the D series
• No size marking is published
• Shares its published weight with oversize seat 858332

🔌 Function

Provides the hardened annular face in the cylinder head that the valve closes against to seal the combustion chamber.

⚠️ Common Signs of Failure

• Compression loss and hard starting on one cylinder
• Blowing or hissing at the valve on a compression test
• Valve clearances closing up between services
• Seat recessed, pitted or cracked on inspection
• Seat found loose in its counterbore

🛠️ Service Notes

• Measure the counterbore and check the D series fitment - weight will not tell this seat from 858332
• Check the valve guide for wear at the same time, as a worn guide is what pounds a seat out

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 2003, 2003R, 2003R SOLAS, 2003TB, 2003TB SOLAS, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
• Volvo Penta D2003AG