{"product_id":"national-710644-engine-crankshaft-seal","title":"National 710644 Engine Crankshaft Seal - Front","description":"\u003ch2\u003eOverview of National 710644 Engine Crankshaft Seal\u003c\/h2\u003e\u003cp\u003eThe National 710644 engine crankshaft seal is designed for reliable sealing performance in select Toyota 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: 1.890 inches (48.000 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 2.689 inches (68.300 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.276 inches (7.000 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: durable fluoro-elastomer\u003c\/li\u003e\n\u003cli\u003eHelix type: clockwise-spiral lip design for effective sealing\u003c\/li\u003e\n\u003cli\u003eCompatible housing bore: 2.677 inches (68.000 mm)\u003c\/li\u003e\n\u003cli\u003ePart number: 710644, series 710600\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThis National crankshaft seal (part number 710644) is constructed from fluoro-elastomer, a material known for its resistance to heat, oil, and chemicals, making it suitable for demanding engine environments. The seal features a clockwise-spiral lip design that enhances sealing efficiency by directing oil back into the engine, reducing leakage. With an inside diameter of 1.890 inches and an outside diameter of 2.689 inches, it fits precisely into the housing bore of 2.677 inches, ensuring a secure fit. The 0.276-inch thickness provides durability without compromising flexibility.\u003c\/p\u003e\u003ch2\u003eCompatible Toyota Models and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with various Toyota models, including the 4Runner, Previa, T100, and Tacoma. It is specifically designed to meet the sealing requirements of these vehicles’ crankshaft assemblies, helping to maintain engine oil containment and prevent contamination.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the National 710644 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the crankshaft area\u003c\/li\u003e\n\u003cli\u003eReduces risk of engine contamination from external debris\u003c\/li\u003e\n\u003cli\u003eMaintains proper oil pressure by sealing the crankshaft\u003c\/li\u003e\n\u003cli\u003eMinimizes wear on crankshaft bearings by retaining lubrication\u003c\/li\u003e\n\u003cli\u003eHelps avoid costly engine repairs due to oil loss\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 710644 crankshaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the lip. Verify the seal orientation matches the clockwise-spiral lip design to optimize sealing 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’s 710644 crankshaft seal is manufactured to meet industry standards for durability and performance. The fluoro-elastomer material and precision design contribute to long service life under normal operating conditions. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring confidence in the part’s quality.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448357519541,"sku":"BCZK-710644","price":16.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_710644_Fro.jpg?v=1774734777","url":"https:\/\/www.partcatalog.com\/products\/national-710644-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}