{"product_id":"national-5072-engine-crankshaft-seal-rear","title":"National 5072 Engine Crankshaft Seal - Rear","description":"\u003ch2\u003eNational 5072 Engine Crankshaft Seal Overview\u003c\/h2\u003e\u003cp\u003eThe National 5072 engine crankshaft seal is designed to provide reliable sealing performance for a range of General Motors vehicles. Engineered with a nitrile material and a split-lip design, this oil seal kit ensures effective protection against oil leaks in applications such as Chevrolet, GMC, Cadillac, and Pontiac models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 2.625 inches (66.680 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 3.480 inches (88.390 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.380 inches (9.650 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: durable nitrile rubber for oil resistance\u003c\/li\u003e\n\u003cli\u003eSplit-lip design for enhanced sealing and durability\u003c\/li\u003e\n\u003cli\u003eHousing bore size: 3.475 inches (88.265 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 5072 crankshaft seal is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. Its split-lip design improves sealing efficiency by maintaining consistent contact with the crankshaft, reducing the risk of oil leakage. With precise dimensions including a 2.625-inch inside diameter and a 3.480-inch outside diameter, this seal fits securely within the housing bore of 3.475 inches, ensuring a tight and reliable fit. The 0.380-inch thickness provides the necessary durability to withstand engine operating conditions.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with a variety of GM vehicles, including but not limited to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChevrolet models such as Bel Air, Camaro, Caprice, El Camino, Impala, Malibu, Monte Carlo, and Nova\u003c\/li\u003e\n\u003cli\u003eGMC trucks and SUVs including C10, C20, C30, K10, K20, K30, and Suburban variants\u003c\/li\u003e\n\u003cli\u003eCadillac models like DeVille and Eldorado\u003c\/li\u003e\n\u003cli\u003eOldsmobile and Pontiac vehicles including Delta 88 and Parisienne\u003c\/li\u003e\n\u003cli\u003eOther GM platforms such as Blazer, Jimmy, and Commercial Chassis\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by National 5072 Crankshaft Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the crankshaft area\u003c\/li\u003e\n\u003cli\u003eReduces engine oil contamination and loss\u003c\/li\u003e\n\u003cli\u003eHelps maintain proper engine lubrication pressure\u003c\/li\u003e\n\u003cli\u003eMinimizes risk of engine damage due to oil leakage\u003c\/li\u003e\n\u003cli\u003eImproves engine reliability and longevity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 5072 crankshaft seal, ensure the sealing surface and crankshaft are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore to avoid distortion. Verify the seal orientation matches the split-lip design for optimal sealing performance. It is recommended to inspect the crankshaft journal for wear or damage before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational engine seals are manufactured to meet industry standards for durability and performance. The nitrile material and design features provide reliable sealing under typical engine operating conditions. While specific warranty details are not provided, National products are generally backed by quality control processes to ensure fit and function for compatible GM vehicles.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":52178617237685,"sku":"BCZK-5072","price":29.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_5072_Ang.jpg?v=1775590324","url":"https:\/\/www.partcatalog.com\/products\/national-5072-engine-crankshaft-seal-rear","provider":"PartCatalog","version":"1.0","type":"link"}