{"product_id":"dayco-89478-accessory-drive-belt-tensioner-assembly","title":"Dayco 89478 Accessory Drive Belt Tensioner Assembly","description":"\u003ch2\u003eOverview of Dayco Accessory Drive Belt Tensioner Assembly 89478\u003c\/h2\u003e\u003cp\u003eThe Dayco 89478 accessory drive belt tensioner assembly is designed for serpentine belt systems requiring a counter clockwise rotation. This automatic tensioner features a single pulley with precise dimensions to maintain optimal belt tension and alignment in various vehicle applications.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSerpentine belt type compatible\u003c\/li\u003e\n\u003cli\u003eCounter clockwise direction operation\u003c\/li\u003e\n\u003cli\u003eSingle pulley design with 74 mm diameter\u003c\/li\u003e\n\u003cli\u003ePulley width of 39.25 mm for proper belt engagement\u003c\/li\u003e\n\u003cli\u003eAutomatic tensioner type for consistent belt tension\u003c\/li\u003e\n\u003cli\u003ePulley surface is flat to reduce belt wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dayco 89478 tensioner assembly is engineered with a 74 mm diameter pulley that features a flat surface, ensuring smooth contact with the serpentine belt. The pulley width of 39.25 mm supports proper belt tracking and reduces slippage. Designed to rotate counter clockwise, this automatic tensioner maintains consistent tension on the accessory drive belt, which is critical for the reliable operation of engine components such as the alternator, power steering pump, and air conditioning compressor.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Resolution\u003c\/h2\u003e\u003cp\u003eThis tensioner assembly is suitable for vehicles equipped with serpentine belt systems that require a counter clockwise tensioner pulley. It addresses common issues such as:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcessive belt slack causing squealing noises\u003c\/li\u003e\n\u003cli\u003ePremature belt wear due to improper tension\u003c\/li\u003e\n\u003cli\u003eMisalignment of accessory drive components\u003c\/li\u003e\n\u003cli\u003eReduced efficiency of engine accessories\u003c\/li\u003e\n\u003cli\u003eVibration and noise from worn tensioner pulleys\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dayco 89478 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. Verify the direction of rotation matches the counter clockwise specification. Use appropriate tools to relieve tension safely and avoid damage to the belt or tensioner. Inspect the belt for wear and replace if necessary to maintain system integrity.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDayco manufactures the 89478 tensioner assembly to meet OEM standards for durability and performance. While specific warranty details are not provided, Dayco products typically undergo rigorous testing to ensure reliability in demanding automotive environments.\u003c\/p\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":51847586775221,"sku":"BCWL-89478","price":113.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DY_89478_Fro.jpg?v=1774728919","url":"https:\/\/www.partcatalog.com\/products\/dayco-89478-accessory-drive-belt-tensioner-assembly","provider":"PartCatalog","version":"1.0","type":"link"}