{"product_id":"national-5274-engine-crankshaft-seal","title":"National 5274 Engine Crankshaft Seal - Rear","description":"\u003ch2\u003eOverview of National 5274 Engine Crankshaft Seal\u003c\/h2\u003e\u003cp\u003eThe National 5274 engine crankshaft seal is designed for reliable sealing performance in various GM vehicles, including Buick, Chevrolet, and GMC models. This oil seal kit features precise dimensions and durable PTFE material to ensure effective crankshaft sealing and engine protection.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 3.740 inches (95.000 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 4.540 inches (115.320 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.492 inches (12.500 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: PTFE for enhanced wear resistance and sealing\u003c\/li\u003e\n\u003cli\u003eIncludes gasket 733215 for complete sealing solution\u003c\/li\u003e\n\u003cli\u003eType: Fw-h oil seal kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 5274 crankshaft seal is engineered to maintain a tight seal around the engine crankshaft, preventing oil leaks and contamination. Constructed from PTFE, this seal offers excellent chemical resistance and durability under high temperature and pressure conditions. The kit includes gasket 733215, providing a comprehensive sealing system for the crankshaft area. With an inside diameter of 3.740 inches and an outside diameter of 4.540 inches, this seal fits a range of GM vehicles such as the Chevrolet Blazer, GMC Sierra, and Buick Regal. The 0.492-inch thickness ensures a secure fit and long-lasting performance.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with multiple GM makes and models, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBuick Regal, Roadmaster, and Century\u003c\/li\u003e\n\u003cli\u003eChevrolet Camaro, Impala, and Suburban series (C10, C1500, C2500, etc.)\u003c\/li\u003e\n\u003cli\u003eGMC Sierra, Yukon, and Jimmy\u003c\/li\u003e\n\u003cli\u003eCadillac Brougham and Fleetwood\u003c\/li\u003e\n\u003cli\u003eOldsmobile Cutlass and Pontiac Firebird\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is suitable for use in both passenger cars and light trucks, providing a reliable sealing solution for engines requiring a 3.740-inch shaft diameter seal.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by National 5274 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks from the crankshaft area\u003c\/li\u003e\n\u003cli\u003eReduces engine contamination from dirt and debris\u003c\/li\u003e\n\u003cli\u003eMaintains engine oil pressure and efficiency\u003c\/li\u003e\n\u003cli\u003eMinimizes wear on crankshaft bearings\u003c\/li\u003e\n\u003cli\u003eHelps avoid costly engine repairs due to seal failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the crankshaft surface is clean and free of debris before installation\u003c\/li\u003e\n\u003cli\u003eUse proper tools to avoid damaging the PTFE seal during installation\u003c\/li\u003e\n\u003cli\u003eVerify the seal orientation matches the engine specifications\u003c\/li\u003e\n\u003cli\u003eReplace the included gasket 733215 to ensure a complete seal\u003c\/li\u003e\n\u003cli\u003eCheck for proper fitment on the specific Buick, Chevrolet, or GMC model before installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational engine crankshaft seals are manufactured to meet OEM standards for durability and performance. The PTFE material provides resistance to heat, oil, and wear, ensuring long service life. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, providing confidence in the product's reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448219533493,"sku":"BCZK-5274","price":38.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_5274_Ang.jpg?v=1774734532","url":"https:\/\/www.partcatalog.com\/products\/national-5274-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}