{"product_id":"dayco-hd-belt-tensioner-74-mm-pulley-x-38-mm-wide-dayco-89458-day89458","title":"Dayco HD Belt Tensioner - 74 mm Pulley x 38 mm Wide - Dayco 89458 DAY89458","description":"\u003cp\u003ePut the tension back in the serpentine drive with this \u003cstrong\u003eDayco Heavy-Duty Automatic Belt Tensioner\u003c\/strong\u003e distributed by FleetPro Parts \u0026amp; Tires. Dayco builds this one to \u003cstrong\u003eOE grade\u003c\/strong\u003e, and its job is simple and unglamorous: hold steady, correct tension on the serpentine belt of a heavy-duty diesel engine, mile after mile, so the belt keeps its grip on everything it drives. Leave a tired tensioner on the engine and you start buying belts on a schedule instead of on a need. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.\u003c\/p\u003e\n\n\u003ch2\u003eOE-Grade Tension Control: The Dayco HD Tensioner Advantage\u003c\/h2\u003e\n\n\u003cp\u003eBelt tension is not a set-and-forget number. It has to stay inside a narrow band while the engine swings from cold idle to full load, and it is a spring and a bearing that hold that band. This assembly runs a \u003cstrong\u003e74 mm pulley\u003c\/strong\u003e that is \u003cstrong\u003e38 mm wide\u003c\/strong\u003e, the contact face that carries the belt and does the actual work, and it arrives as a complete unit so the spring, the arm and the pulley are all new together. Fitting a fresh belt to a used tensioner is the most common way a good belt job goes wrong.\u003c\/p\u003e\n\n\u003cp\u003eAt FleetPro Parts \u0026amp; Tires, we would rather send you the part that carries the OE grade than the cheapest thing on the shelf that fits. This is a genuine \u003cstrong\u003eDayco\u003c\/strong\u003e unit, new, and backed by the \u003cstrong\u003e1-Year FleetPro Warranty\u003c\/strong\u003e. It is ordered and cross-referenced in the industry as \u003cstrong\u003e89458\u003c\/strong\u003e. Because this tensioner covers a range of heavy-duty truck engines, check the Dayco application guide against your engine before you order, and plan to replace the belt at the same time. A tensioner and a belt are a matched pair.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eVehicle Fitment \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis OE-grade heavy-duty tensioner is intended for the following commercial applications:\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Heavy-duty truck diesel engines\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBelt Type:\u003c\/strong\u003e Serpentine\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Automatic tensioner on the serpentine belt drive\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVerification:\u003c\/strong\u003e Confirm against the Dayco application guide for your engine\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComponent Group:\u003c\/strong\u003e Engine Accessory Drive \/ Belts \u0026amp; Tensioners\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eDirect Replacement \u0026amp; Cross-Reference Numbers:\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eOrder this Dayco heavy-duty tensioner by the following part numbers:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDayco Interchange:\u003c\/strong\u003e 89458\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFleetPro Part #:\u003c\/strong\u003e DAY89458\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Heavy-Duty Automatic Belt Tensioner\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulley Diameter:\u003c\/strong\u003e 74 mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePulley Width:\u003c\/strong\u003e 38 mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBelt Type:\u003c\/strong\u003e Serpentine\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e OE\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-Year FleetPro Warranty\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct Level:\u003c\/strong\u003e OEM\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Dayco (Distributed by FleetPro Parts \u0026amp; Tires)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Dayco","offers":[{"title":"Default Title","offer_id":43024031776839,"sku":"DAY89458","price":168.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/8035\/2583\/files\/image_1920_e59bccd0-8c5e-4fdb-ad83-59560136e92f.jpg?v=1785427795","url":"https:\/\/fleetpropt.com\/products\/dayco-hd-belt-tensioner-74-mm-pulley-x-38-mm-wide-dayco-89458-day89458","provider":"FLEETPRO PARTS \u0026 TIRES","version":"1.0","type":"link"}