{"product_id":"national-4307v-engine-crankshaft-seal","title":"National 4307V Engine Crankshaft Seal - Rear","description":"\u003ch2\u003eNational 4307V Engine Crankshaft Seal Overview\u003c\/h2\u003e\u003cp\u003eThe National 4307V engine crankshaft seal is designed to provide reliable sealing performance for a range of GM and other domestic vehicles. Engineered with a fluoro-elastomer material and a counter-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: 2.992 inches (76.000 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 3.633 inches (92.280 mm)\u003c\/li\u003e\n\u003cli\u003eThickness\/width: 0.374 inches (9.500 mm)\u003c\/li\u003e\n\u003cli\u003eMaterial: Durable fluoro-elastomer for heat and chemical resistance\u003c\/li\u003e\n\u003cli\u003eHelix type: Counter-clockwise spiral lip design for effective sealing\u003c\/li\u003e\n\u003cli\u003eHousing bore compatibility: 3.622 inches (92.000 mm)\u003c\/li\u003e\n\u003cli\u003ePart number: 4307V, Series 4000 oil seal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Compatibility\u003c\/h2\u003e\u003cp\u003eThe National 4307V crankshaft seal is part of the Series 4000 line, known for its precision-engineered sealing systems. Its fluoro-elastomer construction offers enhanced resistance to high temperatures and automotive fluids, making it suitable for demanding engine environments. The counter-clockwise spiral lip design improves sealing efficiency by directing oil back into the engine, reducing leakage and contamination risks.\u003c\/p\u003e\u003cp\u003eThis seal is compatible with a wide range of vehicles including Buick, Cadillac, Chevrolet, GMC, Isuzu, Jeep, Oldsmobile, Pontiac, and Saturn models. Specific fitments include popular models such as the Chevrolet Camaro, Impala, Malibu, and Silverado, as well as Jeep Cherokee and GMC Sierra, among others. The precise inside diameter of 2.992 inches (76 mm) and outside diameter of 3.633 inches (92.28 mm) ensure a proper fit in the housing bore of 3.622 inches (92 mm).\u003c\/p\u003e\u003ch2\u003eApplications and Problem Solving\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the engine crankshaft\u003c\/li\u003e\n\u003cli\u003eReduces contamination of engine oil by external debris\u003c\/li\u003e\n\u003cli\u003eMaintains engine oil pressure and lubrication efficiency\u003c\/li\u003e\n\u003cli\u003eHelps avoid premature engine wear caused by oil loss\u003c\/li\u003e\n\u003cli\u003eSupports engine performance in Buick, Chevrolet, GMC, and Jeep vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the National 4307V 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 sealing lip. Verify the orientation of the counter-clockwise spiral lip to face the oil side for optimal sealing. 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 4307V crankshaft seal is manufactured to meet OEM specifications 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 typically offers coverage against manufacturing defects to ensure customer confidence in their sealing products.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448193384629,"sku":"BCZK-4307V","price":32.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_4307V_Fro_82a71ae6-6e11-4c6a-bf52-4c531ba01d98.jpg?v=1774734520","url":"https:\/\/www.partcatalog.com\/products\/national-4307v-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}