DESCRIPTION
A belt tensioner is a component of a truck engine that ensures proper tension on the serpentine belt, which drives various systems such as the alternator, power steering pump, and air conditioning compressor. The part number 3978022 refers to a specific type of belt tensioner designed for use in certain truck models. The belt tensioner uses a spring-loaded pulley to maintain the correct level of tension on the serpentine belt, preventing it from slipping or becoming loose. Over time, wear and tear can cause the tensioner to fail, leading to decreased performance and potential damage to other engine components. Regular inspection and replacement of the belt tensioner can help ensure optimal performance and prevent costly repairs down the line.
RECOMMENDED PARTS
* This information is provided as is and may be out of date. Please contact us or the manufacturer to verify warranty
coverage.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.
; %7D .b %7B fill: none; stroke: %23fff; stroke-miterlimit: 10; stroke-width: 11px; %7D %3C/style%3E%3ClinearGradient id='a' x1='23.8' x2='129.71' y1='37.23' y2='139.74' gradientTransform='matrix(.29182 0 0 .29182 43.5 40.5)' gradientUnits='userSpaceOnUse'%3E%3Cstop stop-color='%23f36d2b' offset='0'/%3E%3Cstop stop-color='%23ee323a' offset='1'/%3E%3C/linearGradient%3E%3Cfilter id='b' x='0' y='0' width='257' height='257' filterUnits='userSpaceOnUse'%3E%3CfeOffset dy='3' input='SourceAlpha'/%3E%3CfeGaussianBlur result='c' stdDeviation='14.5'/%3E%3CfeFlood flood-opacity='.169'/%3E%3CfeComposite in='SourceGraphic' in2='result1'/%3E%3C/filter%3E%3C/defs%3E%3Cg transform='translate(-88,2)'%3E%3Cg class='c' transform='translate(46.5,-40.5)'%3E%3Ccircle class='a' cx='68.305' cy='65.305' r='24.805' style='fill:url(%23a);stroke-width:.29182'/%3E%3C/g%3E%3Cg transform='matrix(.29182 0 0 .29182 104.3 14.299)'%3E%3Ccircle class='b' cx='36' cy='36' r='36'/%3E%3Cpath class='b' transform='translate(-1993.9 -1555.3)' d='m2030 1572v22.852h18.516'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E%0A){kind=small}
; %7D .b %7B fill: none; stroke: %23fff; stroke-miterlimit: 10; stroke-width: 10px; %7D%0A%3C/style%3E%3ClinearGradient id='a' x1='23.8' x2='129.71' y1='37.23' y2='139.74' gradientTransform='matrix(.29182 0 0 .29182 43.5 40.5)' gradientUnits='userSpaceOnUse'%3E%3Cstop stop-color='%23f36d2b' offset='0'/%3E%3Cstop stop-color='%23ee323a' offset='1'/%3E%3C/linearGradient%3E%3Cfilter id='b' x='0' y='0' width='257' height='257' filterUnits='userSpaceOnUse'%3E%3CfeOffset dy='3' input='SourceAlpha'/%3E%3CfeGaussianBlur result='c' stdDeviation='14.5'/%3E%3CfeFlood flood-opacity='.169'/%3E%3CfeComposite in='SourceGraphic' in2='result1'/%3E%3C/filter%3E%3C/defs%3E%3Cg transform='translate(2,2)'%3E%3Cg class='c' transform='translate(-43.5,-40.5)'%3E%3Ccircle class='a' cx='68.305' cy='65.305' r='24.805' style='fill:url(%23a);stroke-width:.29182'/%3E%3C/g%3E%3Cg transform='matrix(.29182 0 0 .29182 15.648 15.86)'%3E%3Cpath class='b' transform='translate(-1735.3 -1357)' d='m1751 1384.5 10.419 10.419 20.453-20.452'/%3E%3Cpath class='b' transform='translate(-2778 -1743)' d='m2838.7 1743c0 41.7 7.358 46.734-30.046 69.422-37.405-22.688-30.047-27.726-30.047-69.422z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E){kind=small}
; %7D .b %7B fill: none; stroke: %23fff; stroke-miterlimit: 10; stroke-width: 11px; %7D %3C/style%3E%3ClinearGradient id='a' x1='23.8' x2='129.71' y1='37.23' y2='139.74' gradientTransform='matrix(.29182 0 0 .29182 43.5 40.5)' gradientUnits='userSpaceOnUse'%3E%3Cstop stop-color='%23f36d2b' offset='0'/%3E%3Cstop stop-color='%23ee323a' offset='1'/%3E%3C/linearGradient%3E%3Cfilter id='b' x='0' y='0' width='257' height='257' filterUnits='userSpaceOnUse'%3E%3CfeOffset dy='3' input='SourceAlpha'/%3E%3CfeGaussianBlur result='c' stdDeviation='14.5'/%3E%3CfeFlood flood-opacity='.169'/%3E%3CfeComposite in='SourceGraphic' in2='result1'/%3E%3C/filter%3E%3C/defs%3E%3Cg transform='translate(-1137 -1)'%3E%3C/g%3E%3Cg%3E%3Cellipse class='a' transform='translate(-41.5 -38.5)' cx='68.305' cy='65.305' rx='24.805' ry='24.805' style='fill:url(%23a);stroke-width:.29182'/%3E%3Cpath class='b' transform='matrix(.29182 0 0 .29182 16.683 28.431)' d='m26.284 0-26.284 17.551m42.284-17.551 26.284 17.551m-25.284-21.551a9 9 0 0 1-9 9 9 9 0 0 1-9-9 9 9 0 0 1 9-9 9 9 0 0 1 9 9zm31.5-0.391a40.5 40.5 0 0 1-40.5 40.5 40.5 40.5 0 0 1-40.5-40.5 40.5 40.5 0 0 1 40.5-40.5 40.5 40.5 0 0 1 40.5 40.5z' style='fill:none;stroke-miterlimit:10;stroke-width:11px;stroke:%23fff'/%3E%3C/g%3E%3C/svg%3E){kind=small}