{"product_id":"generac-0c2978-cylinder-head-gasket-genuine-oem-replacement-gtv990-engine-head-gasket","title":"Generac 0C2978 Cylinder Head Gasket – Genuine OEM Replacement GTV990 Engine Head Gasket","description":"\u003cp data-start=\"0\" data-end=\"199\"\u003e\u003cstrong data-start=\"0\" data-end=\"16\"\u003ePart Number:\u003c\/strong\u003e 0C2978\u003cbr data-start=\"23\" data-end=\"26\"\u003e\u003cstrong data-start=\"26\" data-end=\"39\"\u003eCategory:\u003c\/strong\u003e Generator Parts → Engine Components → Cylinder Head Gaskets\u003cbr data-start=\"99\" data-end=\"102\"\u003e\u003cstrong data-start=\"102\" data-end=\"111\"\u003eType:\u003c\/strong\u003e Generac 0C2978 Cylinder Head Gasket – Genuine OEM Replacement GTV990 Engine Head Gasket\u003c\/p\u003e\n\u003chr data-start=\"201\" data-end=\"204\"\u003e\n\u003cp data-start=\"206\" data-end=\"745\"\u003eThe Generac 0C2978 Cylinder Head Gasket is a genuine OEM replacement gasket designed for compatible Generac equipment powered by designated GTV990 engines. Installed between the cylinder head and engine block, this gasket helps seal the combustion chamber, maintain proper cylinder compression, and prevent combustion gases or engine oil from leaking across the mating surfaces. Manufactured to original equipment specifications, it provides the correct fit and sealing characteristics required for dependable engine repair and rebuilding.\u003c\/p\u003e\n\u003chr data-start=\"747\" data-end=\"750\"\u003e\n\u003ch2 data-section-id=\"1pi78xj\" data-start=\"752\" data-end=\"782\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"755\" data-end=\"782\"\u003eKey Features \u0026amp; Benefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"784\" data-end=\"1308\"\u003e\n\u003cli data-section-id=\"61lldd\" data-start=\"784\" data-end=\"805\"\u003ePart Number: 0C2978\u003c\/li\u003e\n\u003cli data-section-id=\"1n1ya84\" data-start=\"806\" data-end=\"844\"\u003eGenuine OEM Generac replacement part\u003c\/li\u003e\n\u003cli data-section-id=\"107znp0\" data-start=\"845\" data-end=\"897\"\u003eDesigned for designated GTV990 engine applications\u003c\/li\u003e\n\u003cli data-section-id=\"772l7h\" data-start=\"898\" data-end=\"939\"\u003eReplacement engine cylinder head gasket\u003c\/li\u003e\n\u003cli data-section-id=\"8ia2my\" data-start=\"940\" data-end=\"1000\"\u003eSeals the joint between the cylinder head and engine block\u003c\/li\u003e\n\u003cli data-section-id=\"1x4holx\" data-start=\"1001\" data-end=\"1045\"\u003eHelps maintain proper cylinder compression\u003c\/li\u003e\n\u003cli data-section-id=\"4yjc2o\" data-start=\"1046\" data-end=\"1106\"\u003eContains combustion pressure within the combustion chamber\u003c\/li\u003e\n\u003cli data-section-id=\"1o4yx3\" data-start=\"1107\" data-end=\"1160\"\u003eHelps prevent combustion gas and engine oil leakage\u003c\/li\u003e\n\u003cli data-section-id=\"1k2s13q\" data-start=\"1161\" data-end=\"1201\"\u003eSupports dependable engine performance\u003c\/li\u003e\n\u003cli data-section-id=\"fyhvnz\" data-start=\"1202\" data-end=\"1253\"\u003eManufactured to original equipment specifications\u003c\/li\u003e\n\u003cli data-section-id=\"blcqc2\" data-start=\"1254\" data-end=\"1308\"\u003eIdeal for engine repair, maintenance, and rebuilding\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1310\" data-end=\"1313\"\u003e\n\u003ch2 data-section-id=\"id1bjs\" data-start=\"1315\" data-end=\"1346\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1318\" data-end=\"1346\"\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"1348\" data-end=\"1674\"\u003e\n\u003cli data-section-id=\"61lldd\" data-start=\"1348\" data-end=\"1369\"\u003ePart Number: 0C2978\u003c\/li\u003e\n\u003cli data-section-id=\"1419b18\" data-start=\"1370\" data-end=\"1393\"\u003eManufacturer: Generac\u003c\/li\u003e\n\u003cli data-section-id=\"l7fxt6\" data-start=\"1394\" data-end=\"1437\"\u003eProduct Type: Engine Cylinder Head Gasket\u003c\/li\u003e\n\u003cli data-section-id=\"6c5xx4\" data-start=\"1438\" data-end=\"1499\"\u003eEngine Application: Designated GTV990 engine configurations\u003c\/li\u003e\n\u003cli data-section-id=\"ok7feu\" data-start=\"1500\" data-end=\"1567\"\u003eInstallation Location: Between the cylinder head and engine block\u003c\/li\u003e\n\u003cli data-section-id=\"1bpg81b\" data-start=\"1568\" data-end=\"1628\"\u003eApplication: Combustion chamber and engine passage sealing\u003c\/li\u003e\n\u003cli data-section-id=\"t73psd\" data-start=\"1629\" data-end=\"1644\"\u003eOEM Part: Yes\u003c\/li\u003e\n\u003cli data-section-id=\"1ic2kyp\" data-start=\"1645\" data-end=\"1674\"\u003eQuantity: Sold Individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1676\" data-end=\"1679\"\u003e\n\u003ch2 data-section-id=\"4jtp2i\" data-start=\"1681\" data-end=\"1711\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1684\" data-end=\"1711\"\u003eCompatible Applications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1713\" data-end=\"1866\"\u003eThe Generac 0C2978 Cylinder Head Gasket is designed for select Generac generators and compatible equipment using designated GTV990 engine configurations.\u003c\/p\u003e\n\u003cp data-start=\"1868\" data-end=\"2049\"\u003eAlways verify the equipment model, engine model, serial number, original part number, required quantity, and applicable parts diagram before ordering to ensure proper compatibility.\u003c\/p\u003e\n\u003chr data-start=\"2051\" data-end=\"2054\"\u003e\n\u003ch2 data-section-id=\"i0lxki\" data-start=\"2056\" data-end=\"2099\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2059\" data-end=\"2099\"\u003eFunction of the Cylinder Head Gasket\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"2101\" data-end=\"2148\"\u003eThe 0C2978 Cylinder Head Gasket is designed to:\u003c\/p\u003e\n\u003cul data-start=\"2150\" data-end=\"2520\"\u003e\n\u003cli data-section-id=\"1pa1b29\" data-start=\"2150\" data-end=\"2219\"\u003eSeal the mating surfaces between the cylinder head and engine block\u003c\/li\u003e\n\u003cli data-section-id=\"1tx2ldj\" data-start=\"2220\" data-end=\"2258\"\u003eMaintain proper cylinder compression\u003c\/li\u003e\n\u003cli data-section-id=\"3yiv30\" data-start=\"2259\" data-end=\"2312\"\u003eContain combustion pressure during engine operation\u003c\/li\u003e\n\u003cli data-section-id=\"7pd81r\" data-start=\"2313\" data-end=\"2358\"\u003eHelp prevent combustion gases from escaping\u003c\/li\u003e\n\u003cli data-section-id=\"eb7s1e\" data-start=\"2359\" data-end=\"2414\"\u003eKeep engine oil separated from the combustion chamber\u003c\/li\u003e\n\u003cli data-section-id=\"16lxjve\" data-start=\"2415\" data-end=\"2466\"\u003eSupport efficient and dependable engine operation\u003c\/li\u003e\n\u003cli data-section-id=\"15a80k4\" data-start=\"2467\" data-end=\"2520\"\u003eRestore the engine’s original sealing functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2522\" data-end=\"2662\"\u003eA properly installed OEM cylinder head gasket is essential for maintaining compression, combustion efficiency, and overall engine integrity.\u003c\/p\u003e\n\u003chr data-start=\"2664\" data-end=\"2667\"\u003e\n\u003ch2 data-section-id=\"1h7g79j\" data-start=\"2669\" data-end=\"2710\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2672\" data-end=\"2710\"\u003eCommon Signs Replacement Is Needed\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"2712\" data-end=\"2759\"\u003eReplace the cylinder head gasket if you notice:\u003c\/p\u003e\n\u003cul data-start=\"2761\" data-end=\"3144\"\u003e\n\u003cli data-section-id=\"ik4nxe\" data-start=\"2761\" data-end=\"2789\"\u003eLoss of engine compression\u003c\/li\u003e\n\u003cli data-section-id=\"1fb3mxw\" data-start=\"2790\" data-end=\"2830\"\u003eDifficult starting or failure to start\u003c\/li\u003e\n\u003cli data-section-id=\"134nm9p\" data-start=\"2831\" data-end=\"2853\"\u003eReduced engine power\u003c\/li\u003e\n\u003cli data-section-id=\"1vhdbkm\" data-start=\"2854\" data-end=\"2898\"\u003eRough, unstable, or inconsistent operation\u003c\/li\u003e\n\u003cli data-section-id=\"zsxugs\" data-start=\"2899\" data-end=\"2941\"\u003eOil leaking near the cylinder head joint\u003c\/li\u003e\n\u003cli data-section-id=\"xetew6\" data-start=\"2942\" data-end=\"2994\"\u003eCombustion gases escaping around the cylinder head\u003c\/li\u003e\n\u003cli data-section-id=\"kquevq\" data-start=\"2995\" data-end=\"3035\"\u003eExcessive engine operating temperature\u003c\/li\u003e\n\u003cli data-section-id=\"1mbi8ng\" data-start=\"3036\" data-end=\"3088\"\u003eVisible gasket burning, cracking, or deterioration\u003c\/li\u003e\n\u003cli data-section-id=\"1dllzi1\" data-start=\"3089\" data-end=\"3144\"\u003eGasket damage discovered during cylinder head removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3146\" data-end=\"3295\"\u003eA damaged head gasket can lead to compression loss, oil leakage, overheating, inefficient combustion, and potentially serious internal engine damage.\u003c\/p\u003e\n\u003chr data-start=\"3297\" data-end=\"3300\"\u003e\n\u003ch2 data-section-id=\"bnihmp\" data-start=\"3302\" data-end=\"3337\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3305\" data-end=\"3337\"\u003eInstallation \u0026amp; Service Notes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"3339\" data-end=\"4252\"\u003e\n\u003cli data-section-id=\"1bsg1qp\" data-start=\"3339\" data-end=\"3422\"\u003eShut down the equipment and allow the engine to cool completely before servicing.\u003c\/li\u003e\n\u003cli data-section-id=\"1k497az\" data-start=\"3423\" data-end=\"3514\"\u003eDisconnect the spark plug wires and battery, if equipped, to prevent accidental starting.\u003c\/li\u003e\n\u003cli data-section-id=\"5jazsw\" data-start=\"3515\" data-end=\"3584\"\u003eRemove the necessary engine components to access the cylinder head.\u003c\/li\u003e\n\u003cli data-section-id=\"1tyet27\" data-start=\"3585\" data-end=\"3662\"\u003eFollow the appropriate Generac service procedure for cylinder head removal.\u003c\/li\u003e\n\u003cli data-section-id=\"14z1wnm\" data-start=\"3663\" data-end=\"3746\"\u003eRemove all old gasket material without scratching or gouging the mating surfaces.\u003c\/li\u003e\n\u003cli data-section-id=\"5k8e49\" data-start=\"3747\" data-end=\"3829\"\u003eInspect the cylinder head and engine block for warping, cracks, or other damage.\u003c\/li\u003e\n\u003cli data-section-id=\"roluy0\" data-start=\"3830\" data-end=\"3912\"\u003eInstall the 0C2978 Cylinder Head Gasket in the correct position and orientation.\u003c\/li\u003e\n\u003cli data-section-id=\"m40cb8\" data-start=\"3913\" data-end=\"4011\"\u003eTighten the cylinder head fasteners using the manufacturer-specified sequence and torque values.\u003c\/li\u003e\n\u003cli data-section-id=\"1ab5t2r\" data-start=\"4012\" data-end=\"4081\"\u003eCheck valve clearance and related engine adjustments when required.\u003c\/li\u003e\n\u003cli data-section-id=\"mvoh8w\" data-start=\"4082\" data-end=\"4164\"\u003eRotate the engine manually before startup to confirm proper mechanical movement.\u003c\/li\u003e\n\u003cli data-section-id=\"dinr4t\" data-start=\"4165\" data-end=\"4252\"\u003eTest the engine and inspect the cylinder head area for leakage or abnormal operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4254\" data-end=\"4566\"\u003e\u003cstrong data-start=\"4254\" data-end=\"4268\"\u003eImportant:\u003c\/strong\u003e Do not reuse a compressed cylinder head gasket. Do not apply gasket sealant unless specifically directed by the Generac service manual. Professional installation is recommended because incorrect surface preparation, gasket orientation, or fastener torque can cause gasket failure or engine damage.\u003c\/p\u003e\n\u003chr data-start=\"4568\" data-end=\"4571\"\u003e\n\u003ch2 data-section-id=\"d80cxu\" data-start=\"4573\" data-end=\"4607\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"4576\" data-end=\"4607\"\u003eMaintenance Recommendations\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"4609\" data-end=\"5146\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1bdgawl\" data-start=\"4609\" data-end=\"4674\"\u003eKeep the engine’s cooling passages and ventilation areas clean.\u003c\/li\u003e\n\u003cli data-section-id=\"hf6kcw\" data-start=\"4675\" data-end=\"4751\"\u003eMaintain the correct engine oil level and recommended oil-change schedule.\u003c\/li\u003e\n\u003cli data-section-id=\"t2qr74\" data-start=\"4752\" data-end=\"4821\"\u003eAvoid operating the equipment under continuous overload conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"18bujr4\" data-start=\"4822\" data-end=\"4892\"\u003eInvestigate overheating, compression loss, and oil leakage promptly.\u003c\/li\u003e\n\u003cli data-section-id=\"n9f4oc\" data-start=\"4893\" data-end=\"4966\"\u003eCheck cylinder head fasteners only when directed by the service manual.\u003c\/li\u003e\n\u003cli data-section-id=\"xs7ui7\" data-start=\"4967\" data-end=\"5031\"\u003eReplace the head gasket whenever the cylinder head is removed.\u003c\/li\u003e\n\u003cli data-section-id=\"zuvkop\" data-start=\"5032\" data-end=\"5146\" data-is-last-node=\"\"\u003eUse genuine OEM replacement parts to maintain proper fit, compression sealing, and long-term engine reliability.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Generac","offers":[{"title":"Default Title","offer_id":53588875510123,"sku":"0C2978","price":8.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/9201\/5723\/files\/0C2978.webp?v=1784690925","url":"https:\/\/generalsprayers.com\/products\/generac-0c2978-cylinder-head-gasket-genuine-oem-replacement-gtv990-engine-head-gasket","provider":"GeneralSprayers","version":"1.0","type":"link"}