{"product_id":"national-5512-engine-crankshaft-seal","title":"National 5512 Engine Crankshaft Seal - Rear","description":"\u003ch2\u003eOverview of National 5512 Engine Crankshaft Seal\u003c\/h2\u003e\u003cp\u003eThe National 5512 engine crankshaft seal is designed to provide reliable sealing performance for various GM and Isuzu vehicles. Engineered with a counter-clockwise spiral lip design and durable PTFE material, this oil seal kit ensures effective protection against oil leaks in your Cadillac, Chevrolet, GMC, and Isuzu models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInside diameter options: 3.740 inches (95.000 mm)\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 4.540 inches (115.320 mm)\u003c\/li\u003e\n\u003cli\u003eThickness: 0.477 inches (12.120 mm)\u003c\/li\u003e\n\u003cli\u003eOverall width with side lip: 0.684 inches (17.370 mm)\u003c\/li\u003e\n\u003cli\u003eCounter-clockwise spiral lip design for enhanced sealing\u003c\/li\u003e\n\u003cli\u003eConstructed from PTFE material for durability and chemical resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe National 5512 crankshaft seal features precise dimensions to fit shafts measuring 3.740 inches (95.000 mm) in diameter, with an outside diameter of 4.540 inches (115.320 mm). The seal thickness of 0.477 inches (12.120 mm) and an overall width including the side lip of 0.684 inches (17.370 mm) provide a secure fit and effective sealing surface. The counter-clockwise spiral lip design helps maintain a tight seal under varying engine conditions, reducing the risk of oil leakage and contamination. Made from PTFE, the seal offers excellent resistance to heat, oil, and wear, contributing to longer service life in demanding engine environments.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis engine crankshaft seal is compatible with a range of vehicles including Cadillac, Chevrolet, GMC, Isuzu, and Oldsmobile models. Specifically, it fits popular models such as the Chevrolet Silverado 1500, Tahoe, Blazer, and GMC Sierra 1500, as well as Isuzu Hombre and Oldsmobile Bravada. The National 5512 is suitable for use in various trucks, SUVs, and vans like the Chevrolet Express 1500, 2500, and 3500 series, GMC Savana, and Cadillac Escalade, ensuring proper sealing in these applications.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by the National 5512 Seal\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents oil leaks around the engine crankshaft\u003c\/li\u003e\n\u003cli\u003eReduces contamination from dirt and debris entering the engine\u003c\/li\u003e\n\u003cli\u003eMinimizes wear on the crankshaft and surrounding components\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\u003eWhen installing the National 5512 crankshaft seal, ensure the shaft and housing surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the lip or seal body. Verify the orientation of the counter-clockwise spiral lip design to match engine rotation direction. Lubricate the seal lip lightly with clean engine oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational engine crankshaft seals are manufactured to meet industry standards for durability and performance. The PTFE material and precision design contribute to consistent sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in product reliability.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448223170741,"sku":"BCZK-5512","price":24.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_5512_Ang.jpg?v=1774734533","url":"https:\/\/www.partcatalog.com\/products\/national-5512-engine-crankshaft-seal","provider":"PartCatalog","version":"1.0","type":"link"}