20709467 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

A genuine intake-valve seat insert used in a serial-controlled Volvo Penta D16 cylinder head. The documented catalogue application is through engine serial number 2016074098; later cylinder-head versions must be checked separately.

🚤 Compatibility

• Engine Family: TAD, D, TWD
• Serial Range: SN-2016074098

Full model list at the end of this description.

⚙️ Key Features

• Intake-valve seat material and hardness matched to D16 combustion and heat transfer
• Interference-fit outside diameter matches the specified cylinder-head counterbore
• Seat angle and width must be machined concentrically to the matching inlet valve
• Documented for the applicable cylinder-head version through SN2016074098
• Valve recession and protrusion must be checked after installation
• Professional cylinder-head machining is required

🔌 Function

Provides the precision sealing and heat-transfer surface against which the inlet valve closes.

⚠️ Common Signs of Failure

• Compression leaks past the inlet valve
• The seat is cracked, recessed, pitted or loose
• Valve clearance changes as the seat recedes
• The seat cannot be machined to the specified contact width
• Cylinder-head overhaul requires replacement after valve damage

🛠️ Service Notes

• Seat inserts are an interference fit in the head, so the counterbore has to be clean, round, flat and square before a new seat goes in; normal practice is to chill the insert and warm the head so it drops into place rather than forcing it
• This is machine-shop work — the seat must be cut concentric with the valve guide after installation, so check or renew the guides at the same time and cut the seat angles once the insert is secure
• Inspect the head casting for cracks and for a pounded or spread counterbore before committing to a new seat; a seat that has come loose has usually damaged its pocket
• Use the interference fit, insert size and seat angles specified for your engine rather than any general figure, as they differ between heads
• Check each valve on its finished seat for an even contact band right the way round, and confirm valve position and any permitted recession against the workshop manual for your engine

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20709467 - Intake valve seat through SN2016074098
• 20709580 - Related D16 valve cover
• 20736230 - Related valve-cover sealing strip
• 21575727 - Related valve-cover gasket

Aftermarket / Verified Equivalents

• SYNC: 01-1601

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D16C-A MG, D16C-A MH, D16C-B MH, D16C-C MH, D16C-D MH
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
• Volvo Penta TAD1640GE, TAD1640VE-B
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE