{"product_id":"1543973-valve-seat-genuine-volvo-penta","title":"1543973 Valve Seat | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n This is a genuine Volvo Penta valve seat insert for the cylinder head of TAMD162, TID162 and TWD1620G series marine diesel engines. It is supplied in the 0.20 mm oversize (O.S) dimension for machining into a head where the original seat bore has been cut oversize, so it must be matched to the actual bore in your cylinder head. As an Engine group component, it forms the hardened sealing face against which the valve closes.\n\u003c\/p\u003e\n\u003ch2\u003e\n 🚤 Compatibility\n\u003c\/h2\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Volvo Penta TWD1620G\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TID162AG\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TID162AGP\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TID162AP\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TID162APB\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAMD162A\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAMD162B\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAMD162C\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAMD162C-B\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   Engine Family:\n  \u003c\/strong\u003e\n  TWD, TID, TAMD\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n ⚙️ Key Features\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Genuine Volvo Penta OEM part number 1543973\n \u003c\/li\u003e\n \u003cli\u003e\n  Oversize dimension: O.S = 0.20 mm — confirm cylinder head bore size before ordering\n \u003c\/li\u003e\n \u003cli\u003e\n  System group: Engine\n \u003c\/li\u003e\n \u003cli\u003e\n  Net weight: 0.029 kg\n \u003c\/li\u003e\n \u003cli\u003e\n  Fits TAMD162, TID162 and TWD1620G series marine diesel engines\n \u003c\/li\u003e\n \u003cli\u003e\n  Sold individually — one seat per valve position\n \u003c\/li\u003e\n \u003cli\u003e\n  Engine type: Volvo Penta TAD16 \/ TWD16 six-cylinder diesel\n \u003c\/li\u003e\n \u003cli\u003e\n  50.28mm (Volvo assembly listing)\n \u003c\/li\u003e\n \u003cli\u003e\n  12 used per assembly\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n The valve seat is a hardened insert fitted into the cylinder head that provides the sealing surface for the intake or exhaust valve face. It maintains combustion chamber compression sealing and conducts heat away from the valve head into the cylinder head.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Loss of compression or hard starting on one or more cylinders\n \u003c\/li\u003e\n \u003cli\u003e\n  Valve recession or excessive seat wear found during head overhaul\n \u003c\/li\u003e\n \u003cli\u003e\n  Burnt, pitted or channelled sealing face causing exhaust blow-by\n \u003c\/li\u003e\n \u003cli\u003e\n  Cracked or loosened insert that has moved in its bore in the cylinder head\n \u003c\/li\u003e\n \u003cli\u003e\n  Poor valve sealing that cannot be corrected by regrinding the existing seat\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🛠️ Service Notes\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  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\n \u003c\/li\u003e\n \u003cli\u003e\n  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\n \u003c\/li\u003e\n \u003cli\u003e\n  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\n \u003c\/li\u003e\n \u003cli\u003e\n  Use the interference fit, insert size and seat angles specified for your engine rather than any general figure, as they differ between heads\n \u003c\/li\u003e\n \u003cli\u003e\n  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\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/h2\u003e\n\u003ch3\u003e\n OEM \/ Related Numbers\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  1543861 - standard-size inlet valve seat\n \u003c\/li\u003e\n \u003cli\u003e\n  1543972 - 0.20 mm oversize exhaust valve seat\n \u003c\/li\u003e\n \u003cli\u003e\n  1543860 - standard-size exhaust valve seat\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 📦 Condition\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Genuine Volvo Penta part\n \u003c\/li\u003e\n \u003cli\u003e\n  Brand new\n \u003c\/li\u003e\n \u003cli\u003e\n  Supplied in original or equivalent packaging\n \u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Volvo Penta","offers":[{"title":"Default Title","offer_id":53380805722404,"sku":"8226429","price":101.61,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_7530211e-a23e-4946-b6c9-29af7974bb3b.jpg?v=1788055294","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/1543973-valve-seat-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}