{"product_id":"elring-187-666-engine-valve-stem-oil-seal","title":"Elring 187.666 Engine Valve Stem Oil Seal","description":"\u003ch2\u003eElring 187.666 Valve Stem Oil Seal\u003c\/h2\u003e\u003cp\u003eElring 187.666 is an engine valve stem oil seal made from FPM (fluoride rubber) for controlled sealing at the valve stem. With an inside diameter of 14.0 mm, outside diameter of 18.0 mm, thickness of 13.6 mm, and valve stem diameter of 8 mm, it is specified for select BMW inline-six applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFPM (fluoride rubber) construction for high-temperature sealing performance\u003c\/li\u003e\n\u003cli\u003eInside diameter: 14.0 mm\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 18.0 mm\u003c\/li\u003e\n\u003cli\u003eThickness: 13.6 mm\u003c\/li\u003e\n\u003cli\u003eValve stem diameter: 8 mm\u003c\/li\u003e\n\u003cli\u003eElring part number 187.666 for direct catalog lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Elring valve stem oil seal is used in the cylinder head to help maintain proper oil control around the valve stem area. It is listed for 1975-1978 BMW 530i, 1977-1979 BMW 320i, 1979 BMW 528i, and 1980-1981 BMW 528i, with fitment notes calling out the 13.6 mm height, 14 mm inner diameter, and 18 mm outer diameter. For BMW 528i and BMW 320i service work, Elring 187.666 provides the dimensional match needed for the specified engine sealing application.\u003c\/p\u003e\u003cp\u003eThis part cross-references BMW 11 34 1 252 363 and 11 34 1 256 556 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOil entering the combustion chamber through worn valve stem seals\u003c\/li\u003e\n\u003cli\u003eBlue exhaust smoke during startup or deceleration\u003c\/li\u003e\n\u003cli\u003eOil consumption caused by hardened or aged stem seals\u003c\/li\u003e\n\u003cli\u003eValve guide area leakage during cylinder head service\u003c\/li\u003e\n\u003cli\u003eRestoration work on BMW 530i, 320i, and 528i engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify valve stem diameter, seal height, and outer diameter before installation. Clean the valve guide and stem area thoroughly, and inspect the valve stem and guide for wear that could affect sealing. During cylinder head service, confirm the seal seats fully and evenly to maintain proper oil control. Use the exact fitment notes for the listed BMW 530i, 320i, and 528i applications when matching this seal to the engine.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eElring is an established engine sealing brand, and this seal is built to the listed dimensional specifications for the confirmed BMW applications. Elring 187.666 is cataloged for precise engine sealing service where the original dimensions are required.\u003c\/p\u003e","brand":"Elring","offers":[{"title":"Default Title","offer_id":43410973196469,"sku":"DTWD-187.666","price":13.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/EL_187666_Fro_d50dce04-a3d2-40bb-9138-1231e846c02f.jpg?v=1774730370","url":"https:\/\/www.partcatalog.com\/products\/elring-187-666-engine-valve-stem-oil-seal","provider":"PartCatalog","version":"1.0","type":"link"}