20900319 Valve Seat | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta hardened valve-seat insert for the specified cylinder-head position. The insert is machined after installation to provide a concentric sealing surface and heat-transfer path between the valve face and the cylinder head.

🚤 Compatibility

• Engine Family: D, TAD
• Serial Range: SN2013429459-

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta Cylinder Head Valve Seat - part number 20900319
• Hardened seat material for repeated combustion loading
• Interference-fit outside diameter for the cylinder-head counterbore
• Machining allowance for final seat angle and width
• Transfers valve heat into the cylinder head
• Maintains compression and valve alignment
• Installation requires specialist cylinder-head equipment and dimensional checks
• Engine type: Application-specific Volvo Penta cylinder-head and valve-train system
• 12 used per assembly

🔌 Function

When the valve closes, its face contacts the machined seat to seal the combustion chamber. The contact band also conducts heat away from the valve into the cooled cylinder head.

⚠️ Common Signs of Failure

• Low compression or cylinder leakage
• Burnt, cracked or recessed seat
• Valve clearance changes as the seat moves
• Poor concentricity causes uneven valve contact
• Seat loosens in the cylinder head

🛠️ 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

Other-Brand OEM Numbers

• VOE20900319

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C4-B MH, D13C1-B MH, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-A MP, D13B-H MP, D13B-G MP, D13B-L MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-K MP, D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-M MP, D13B-C MP, D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C8-B MP
• Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
• Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
• Volvo Penta TAD1342VE, TAD1342GE
• Volvo Penta TAD1343VE, TAD1343GE
• Volvo Penta TAD1345GE, TAD1345VE
• Volvo Penta TAD1350GE, TAD1350VE
• Volvo Penta TAD1351GE, TAD1351-53VE
• Volvo Penta TAD1340VE
• Volvo Penta TAD1346GE
• Volvo Penta TAD1352GE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1354GE
• Volvo Penta TAD1355GE
• Volvo Penta TAD1360-62VE
• Volvo Penta TAD1363-65VE
• Volvo Penta TAD1371-75VE