{"product_id":"20489008-cylinder-head-genuine-volvo-penta","title":"20489008 Cylinder Head | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n D7A-TA cylinder head catalogued through engine serial 10705992. Later new and exchange\/remanufactured cylinder-head alternatives are listed for serial and service comparison. Application note: Catalogue application for 20489008 is shown through engine serial 10705992; confirm the engine product and serial number before ordering.\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 D7A-T\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta D7A-TA\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta D7C-TA\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  D\n \u003c\/li\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   HP Range:\n  \u003c\/strong\u003e\n  Approximately 250 HP\n \u003c\/li\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   Year Range:\n  \u003c\/strong\u003e\n  Approximately late 1990s-2000s\n \u003c\/li\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   Serial Range:\n  \u003c\/strong\u003e\n  SN-10705992\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  OEM cylinder-head casting and machined combustion interfaces\n \u003c\/li\u003e\n \u003cli\u003e\n  Supports the original valves, guides, injector and coolant\/oil passages\n \u003c\/li\u003e\n \u003cli\u003e\n  Serial-dependent alternatives are identified in the cross-reference section\n \u003c\/li\u003e\n \u003cli\u003e\n  Requires inspection of mating surfaces and renewal of specified gaskets and seals\n \u003c\/li\u003e\n \u003cli\u003e\n  Cylinder-head fasteners and tightening procedure must follow the workshop specification\n \u003c\/li\u003e\n \u003cli\u003e\n  Engine type: 7 L six-cylinder turbocharged diesel\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n Seals the top of the cylinders and carries the valve train, injector and internal oil\/coolant passages required for combustion and heat transfer.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Low compression, hard starting or persistent cylinder misfire\n \u003c\/li\u003e\n \u003cli\u003e\n  Coolant or engine-oil leakage at the cylinder-head joint\n \u003c\/li\u003e\n \u003cli\u003e\n  Combustion gas entering the cooling system or recurring coolant pressurisation\n \u003c\/li\u003e\n \u003cli\u003e\n  Cracked casting, damaged valve seats, worn guides or injector-bore damage\n \u003c\/li\u003e\n \u003cli\u003e\n  Overheating or repeated cylinder-head-gasket failure\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  Check the head for cracks and check the head and block faces for flatness with a straight edge before assembly, and have any doubt about the face or the valve seats resolved before the gasket goes on\n \u003c\/li\u003e\n \u003cli\u003e\n  Clean the gasket faces with care and without scoring them — do not attack an aluminium face with abrasive discs or scrapers, and keep debris out of the bores, coolant passages and bolt holes\n \u003c\/li\u003e\n \u003cli\u003e\n  Always use a new head gasket, and tighten in the stages, sequence and torque-plus-angle steps given in the workshop manual for your engine, with the threads and mating faces clean and lubricated exactly as that manual specifies\n \u003c\/li\u003e\n \u003cli\u003e\n  Head bolts on modern engines are angle-tightened and stretch permanently, so renew them wherever the manual calls for it rather than reusing them\n \u003c\/li\u003e\n \u003cli\u003e\n  Refill and bleed the cooling system properly, then run the engine and carry out any retightening or valve clearance recheck the manual requires after the first running period\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 Supersession Chain\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  20489008 → Supersedes 20412326\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n OEM \/ Related Numbers\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  20405999 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  21037874 later new cylinder head\n \u003c\/li\u003e\n \u003cli\u003e\n  20459962 inlet valve seat\n \u003c\/li\u003e\n \u003cli\u003e\n  20459963 exhaust valve seat\n \u003c\/li\u003e\n \u003cli\u003e\n  20405897 valve guide\n \u003c\/li\u003e\n \u003cli\u003e\n  11700347 compression spring\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n OEM Reman Alternatives\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  3803664 remanufactured cylinder head\n \u003c\/li\u003e\n \u003cli\u003e\n  3801397 exchange cylinder head\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":53385512485156,"sku":"135123X","price":8714.51,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_b9753baa-82cc-4904-84dd-5a9e0336229a.jpg?v=1788060476","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/20489008-cylinder-head-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}