{"product_id":"national-710601-engine-crankshaft-seal","title":"National 710601 Engine Crankshaft Seal - Front","description":"\u003ch2\u003eOverview of National 710601 Engine Crankshaft Seal\u003c\/h2\u003e\u003cp\u003eThe National 710601 engine crankshaft seal is designed to provide reliable sealing performance for select Chevrolet, GMC, and Hummer vehicles. Engineered with precision, this oil seal helps maintain engine integrity by preventing oil leaks around the crankshaft.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter: 76.0 mm (2.992 inches)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 111.2 mm (4.378 inches)\u003c\/li\u003e\n\u003cli\u003eThickness: 13.0 mm (0.512 inches)\u003c\/li\u003e\n\u003cli\u003eMaterial: PTFE for enhanced durability and chemical resistance\u003c\/li\u003e\n\u003cli\u003eCounter-clockwise spiral lip design for effective sealing\u003c\/li\u003e\n\u003cli\u003eCompatible housing bore: 111.0 mm (4.370 inches)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Design Features\u003c\/h2\u003e\u003cp\u003eThis National 710601 crankshaft seal features a counter-clockwise spiral lip design that ensures a tight seal against oil leakage while accommodating rotational movement. Constructed from PTFE material, the seal offers excellent resistance to heat, wear, and engine fluids, making it suitable for heavy-duty applications. The precise dimensions, including a 76 mm shaft diameter and 111.2 mm outside diameter, align with OEM specifications for a secure fit in the housing bore of 111 mm.\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 Chevrolet Express 2500 and 3500, GMC Savana 2500 and 3500, Hummer H1, and various Sierra and Silverado 2500 and 3500 HD models. The part number 710601 ensures correct fitment for these vehicles, supporting engine reliability and performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the crankshaft\u003c\/li\u003e\n\u003cli\u003eReduces engine contamination from external debris\u003c\/li\u003e\n\u003cli\u003eMaintains proper oil pressure within the engine\u003c\/li\u003e\n\u003cli\u003eMinimizes wear on crankshaft and bearing surfaces\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\u003eWhen installing the National 710601 crankshaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the seal orientation matches the counter-clockwise spiral lip design for optimal performance. Lubricate the seal lip lightly with clean engine oil before installation to reduce initial wear.\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 710601 crankshaft seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448353816757,"sku":"BCZK-710601","price":39.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_710601_Fro.jpg?v=1774734770","url":"https:\/\/www.partcatalog.com\/products\/national-710601-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}