{"product_id":"tensioner-belt-3978022-3922900-3937553-for-cummins-6ct-6bt-4bt-4bta-8-3l-engine","title":"Tensioner Belt 3978022 3922900 3937553 for Cummins 6CT 6BT 4BT 4BTA 8.3L Engine","description":"\u003cstrong\u003eDesigned for select Cummins diesel engines and compatible equipment, this aftermarket automatic belt tensioner helps restore proper accessory-belt tension and tracking.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe belt tensioner maintains the pressure needed to keep the accessory belt seated on the pulleys. Bearing noise, arm play, weak spring force, or belt flutter can indicate a worn tensioner.\u003c\/p\u003e\u003cp\u003eReplacement references include \u003cstrong\u003e3978022, 3922900, 3937553\u003c\/strong\u003e. Compare the part number, pulley diameter and width, mounting position, arm offset, and belt layout before ordering.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHelps reduce belt slip, flutter, and misalignment\u003c\/li\u003e\n\u003cli\u003eReplaces a worn pulley bearing or weak tensioner assembly\u003c\/li\u003e\n\u003cli\u003eDesigned for compatible Cummins engine applications\u003c\/li\u003e\n\u003cli\u003eSupports dependable accessory drive operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eCompatible with Cummins 4BT, 4BTA, 6BT, and 6CT engine applications, including select 8.3L configurations. Serial-number breaks, production changes, or equipment options may affect the required part.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Automatic Belt Tensioner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Brand:\u003c\/strong\u003e Cummins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 3978022, 3922900, 3937553\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should the belt be replaced with the tensioner? \u003cstrong\u003eA:\u003c\/strong\u003e Inspect the belt and all idler pulleys for glazing, cracking, wear, or noise. Replacing worn related components together can prevent repeat failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this an original OEM part? \u003cstrong\u003eA:\u003c\/strong\u003e This is a high-quality aftermarket replacement and is not supplied by the original equipment manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSerial-number breaks and production changes may affect fitment. Verify the original part before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"Northline Parts","offers":[{"title":"Default Title","offer_id":42903993811015,"sku":"ZZ2F03043","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/7123\/5399\/files\/177558897994-0.jpg?v=1782415007","url":"https:\/\/www.northlineparts.com\/products\/tensioner-belt-3978022-3922900-3937553-for-cummins-6ct-6bt-4bt-4bta-8-3l-engine","provider":"Northline Parts","version":"1.0","type":"link"}