{"product_id":"21986932-cylinder-head-genuine-volvo-penta","title":"21986932 Cylinder Head | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n Replacement cylinder-head assembly\/casting for the Volvo Penta engine build that specifies 21986932. Combustion-chamber profile, injector bore, valve layout and coolant passages are product-controlled; supplied contents must be confirmed before ordering.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚙️ Key Features\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Precision-machined combustion chambers and deck face\n \u003c\/li\u003e\n \u003cli\u003e\n  Correct valve, injector and coolant-passage geometry\n \u003c\/li\u003e\n \u003cli\u003e\n  Designed for the matching block, gasket and fasteners\n \u003c\/li\u003e\n \u003cli\u003e\n  Pressure and flatness must be checked during installation\n \u003c\/li\u003e\n \u003cli\u003e\n  Assembly contents must be confirmed before ordering\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 cylinder block and houses the combustion chambers, valves, injector locations and coolant passages required for engine breathing and combustion.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Coolant loss or combustion gas in the cooling system\n \u003c\/li\u003e\n \u003cli\u003e\n  Low compression or misfire\n \u003c\/li\u003e\n \u003cli\u003e\n  Cracks between valve seats or injector bores\n \u003c\/li\u003e\n \u003cli\u003e\n  Warped deck surface and head-gasket failure\n \u003c\/li\u003e\n \u003cli\u003e\n  Valve-seat, guide or cam-bearing damage\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  21986932 → Supersedes 21077450\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  21077450 earlier number superseded by this part\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":53379683713316,"sku":"5912641","price":9969.4,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_d256abcb-b986-4f65-960d-6d51575a472a.jpg?v=1777118751","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/21986932-cylinder-head-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}