{"product_id":"national-710258-engine-crankshaft-seal","title":"National 710258 Engine Crankshaft Seal - Rear","description":"\u003ch2\u003eOverview of National 710258 Engine Crankshaft Seal\u003c\/h2\u003e\u003cp\u003eThe National 710258 engine crankshaft seal is designed to provide reliable sealing performance for various Chevrolet, GMC, and Hummer vehicles. Engineered with a fluoro-elastomer material and a counter-clockwise-spiral lip design, this oil seal ensures effective protection against oil leaks and contamination.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 115 mm (4.528 inches)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 135.2 mm (5.323 inches)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 10 mm (0.394 inches)\u003c\/li\u003e\n\u003cli\u003eMaterial: Durable fluoro-elastomer for high resistance to heat and chemicals\u003c\/li\u003e\n\u003cli\u003eHelix type: Counter-clockwise spiral lip design for enhanced sealing\u003c\/li\u003e\n\u003cli\u003eCompatible housing bore: 135 mm (5.315 inches)\u003c\/li\u003e\n\u003cli\u003ePart of the National 710200 series oil seals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe National 710258 crankshaft seal is manufactured to meet the demanding requirements of engine sealing systems. Its fluoro-elastomer construction offers excellent resistance to engine oils, heat, and wear, making it suitable for heavy-duty applications. The counter-clockwise spiral lip design improves sealing efficiency by maintaining consistent contact with the crankshaft, reducing the risk of oil leakage. This seal is engineered to fit precisely within a 135 mm housing bore and accommodate a 115 mm shaft diameter, ensuring a secure and reliable fit.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with a range of Chevrolet, GMC, and Hummer models, including:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChevrolet Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, Express 2500, Express 3500, Tahoe, Yukon\u003c\/li\u003e\n\u003cli\u003eGMC C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, Savana 2500, Savana 3500\u003c\/li\u003e\n\u003cli\u003eHummer H1\u003c\/li\u003e\n\u003cli\u003eAdditional models such as G20, G30, K1500, K1500 Suburban, K2500, K2500 Suburban, K3500, P30, P3500\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by the National 710258 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the engine crankshaft\u003c\/li\u003e\n\u003cli\u003eReduces contamination ingress into the engine\u003c\/li\u003e\n\u003cli\u003eMinimizes wear on the crankshaft and housing bore\u003c\/li\u003e\n\u003cli\u003eMaintains engine oil pressure and efficiency\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\u003cp\u003eProper installation of the National 710258 crankshaft seal is critical for optimal performance. Ensure the housing bore and crankshaft surfaces are clean and free of debris before installation. Use appropriate tools to press the seal evenly into the bore without damaging the sealing lip. Verify the seal orientation matches the counter-clockwise spiral lip design to maintain correct sealing direction. It is recommended to inspect the crankshaft for wear or damage prior to installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational manufactures the 710258 crankshaft seal to meet industry standards for durability and performance. The fluoro-elastomer material and precision design contribute to a long service life under normal operating conditions. This product is part of the National 710200 series, known for consistent quality in engine sealing solutions. Warranty coverage details should be confirmed with the product documentation or manufacturer.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448339857589,"sku":"BCZK-710258","price":45.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_710258_Fro.jpg?v=1774734734","url":"https:\/\/www.partcatalog.com\/products\/national-710258-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}