{"product_id":"national-710891-engine-crankshaft-seal","title":"National 710891 Engine Crankshaft Seal - Front","description":"\u003ch2\u003eOverview of National Engine Crankshaft Seal 710891\u003c\/h2\u003e\u003cp\u003eThe National 710891 engine crankshaft seal is designed to provide reliable sealing performance for various GM and Isuzu vehicles. Engineered with a fluoro-elastomer material and a clockwise-spiral lip design, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 1.763 inches (44.780 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 2.421 inches (61.493 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.375 inches (9.525 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: Durable fluoro-elastomer for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eHelix type: Clockwise-spiral lip design for effective sealing\u003c\/li\u003e\n\u003cli\u003eRedicoat finish for enhanced wear protection\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple GM and Isuzu models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe National 710891 crankshaft seal features a 1.763-inch inside diameter and a 2.421-inch outside diameter, making it suitable for shafts and housings with corresponding dimensions. Its 0.375-inch thickness ensures a secure fit within the housing bore of 2.416 inches (61.366 mm). Constructed from fluoro-elastomer, this seal offers resistance to high temperatures and engine fluids, extending service life. The clockwise-spiral lip design improves sealing efficiency by directing contaminants away from the sealing surface, reducing wear and leakage risks. Additionally, the Redicoat treatment enhances durability under demanding operating conditions.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with a range of vehicles from Cadillac, Chevrolet, GMC, Isuzu, and Oldsmobile. It fits models including the Chevrolet Silverado 1500, Tahoe, Blazer, and Suburban series, as well as GMC Sierra 1500 and Yukon, Cadillac Escalade, and Isuzu Hombre and Bravada. The part number 710891 is specifically designed to meet the sealing requirements of these vehicles’ crankshaft assemblies.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the National 710891 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the crankshaft area\u003c\/li\u003e\n\u003cli\u003eReduces contamination ingress into the engine\u003c\/li\u003e\n\u003cli\u003eMinimizes premature wear of crankshaft bearings\u003c\/li\u003e\n\u003cli\u003eMaintains engine oil pressure and efficiency\u003c\/li\u003e\n\u003cli\u003eProtects against heat and chemical degradation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eEnsure the crankshaft and housing bore are clean and free of debris before installation. Verify the seal dimensions match the shaft and bore measurements precisely. Use appropriate tools to press the seal evenly into the housing without damaging the lip or material. Avoid excessive force or misalignment during installation to maintain the integrity of the fluoro-elastomer seal. Lubricate the seal lip lightly with clean engine oil to facilitate smooth installation and initial operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational’s 710891 crankshaft seal is manufactured to meet OEM specifications for durability and performance. The fluoro-elastomer material and Redicoat finish contribute to long service life under typical engine operating conditions. While specific warranty details may vary, National products generally come with a limited warranty against manufacturing defects, ensuring confidence in product reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448371413173,"sku":"BCZK-710891","price":18.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_710891_Fro.jpg?v=1774734803","url":"https:\/\/www.partcatalog.com\/products\/national-710891-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}