{"product_id":"national-711129-engine-crankshaft-seal-front","title":"National 711129 Engine Crankshaft Seal - Front","description":"\u003ch2\u003eEngine Crankshaft Seal Overview\u003c\/h2\u003e\u003cp\u003eNational 711129 is an engine crankshaft seal built for front applications on a wide range of GM vehicles. It uses a clockwise-spiral lip design and fluoro-elastomer construction to provide a precise sealing interface in demanding engine environments.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFluoro-elastomer seal material for resistance to heat and oil exposure\u003c\/li\u003e\n\u003cli\u003eClockwise-spiral lip design for controlled sealing action\u003c\/li\u003e\n\u003cli\u003eMetric dimensions for accurate housing and shaft fitment\u003c\/li\u003e\n\u003cli\u003ePart number 711129 for direct catalog identification\u003c\/li\u003e\n\u003cli\u003eFits 2014-2019 Cadillac CTS, front and other GM front-engine applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis National crankshaft seal is engineered as an oil seal for front engine service where consistent sealing around the crankshaft is critical. The 72.0 mm housing bore, 55.0 mm shaft size, and 8.0 mm width support precise installation in the specified applications. Fits 2014-2019 Chevrolet Camaro, front and other listed Cadillac, Chevrolet, and GMC models. Part number 711129 is also cross-referenced to 12634614 for the same application.\u003c\/p\u003e\u003cp\u003eNational has supplied sealing products for more than 75 years, and the 711100 series reflects that focus on modern sealing design. For buyers searching for a crankshaft seal for Chevrolet Silverado 1500, GMC Sierra 1500, or Chevrolet Corvette front applications, this part provides a cataloged replacement option with defined dimensions and material specification.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOil leakage at the crankshaft seal area\u003c\/li\u003e\n\u003cli\u003eContamination from a worn or hardened seal lip\u003c\/li\u003e\n\u003cli\u003eLoss of sealing performance from heat-aged rubber\u003c\/li\u003e\n\u003cli\u003eImproper fit from a seal with incorrect dimensions\u003c\/li\u003e\n\u003cli\u003eService replacement for front crankshaft sealing wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify housing bore, shaft diameter, and width before installation. Clean the sealing surface thoroughly and inspect the crankshaft for wear or scoring that could affect seal life. Confirm the vehicle application against the fitment list for the exact model and year before service.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNational is known for sealing solutions backed by more than 75 years of industry experience. The 711129 is part of the 711100 series and uses a fluoro-elastomer sealing material with a spiral lip design for modern engine sealing requirements.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":53669367316661,"sku":"BCZK-711129","price":20.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_711129_Ang.jpg?v=1793692279","url":"https:\/\/www.partcatalog.com\/products\/national-711129-engine-crankshaft-seal-front","provider":"PartCatalog","version":"1.0","type":"link"}