Dayco 89446 | Accessory Drive Belt Tensioner Assembly

Part Number
Accessory Drive Belt Tensioner Assembly

Fits: 98-02 International Genesis RE, 03-07 IC Corporation RE Commercial, 03-04 IC Corporation RE School Bus, 06-07 IC Corporation RE School Bus, 04-07 International 7500, 04-05 International 8600 SBA, 05-06 IC Corporation CE Commercial, 05-08 IC Corporation CE Integrated, 05 IC Corporation FE Integrated, 05 IC Corporation RE Integrated, 05 International 3000RE, 05-07 International 3200, 05-07 International 4300, 05-08 International 4300LP, 05-10 International 4400, 05-10 International 4400LP, 05-06 International 7300, 05-07 International 7400, 05-07 International 8500, 05-06 International CXT, 08 IC Corporation CE Commercial, 06 International RXT

Special Price $75.64 Regular Price $88.99
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Estimated Ship Date: 1 Business Day or Less
As the major supplier to heavy duty original equipment manufacturers, this Dayco® No Slack® Heavy Duty Tensioner is guaranteed to be engineered and manufactured to the strictest design specifications. The heavy-duty cast aluminum body and pulley arms translate into extra strength and durability. This Dayco® Heavy Duty® Tensioner features a patented “flat spring” design that's engineered to handle the higher torque and power pulses exerted by today's diesel engines. Rugged pulleys with double lifetime lubricated bearings deliver long lasting, dependable service. In addition, this Dayco® Heavy Duty Tensioner features an “extremely damped” design using a wave spring and a metal ring with a bonded rubber surface to act as a “radial shock absorber” for the tensioner arm.

BRAND: Dayco




Belt TypeSerpentine
DirectionClock Wise
Number of Pulleys1
Pulley 1 Diameter74
Pulley 1 FlatY
Pulley 1 Width39.25

73 In. Belt O.C.



  • Duralast: 89446
  • NAPA: 38591
  • Gates: 38591
  • John Deere: RE506352
  • NAPA: 38620
  • Gates: 38620
  • CARQUEST: 38591
  • Goodyear: 49565
  • CARQUEST: 38620
  • Goodyear: 49575
  • John Deere: RE550581
  • Navistar: 1841760-C1


  • 1998-2002 International Genesis RE - Position: Fan and Alternator
  • 2005-2007 International 7500 - Position: Fan, Alternator and Air Conditioning
  • 2005-2005 IC Corporation FE Integrated
  • 2005-2007 International 4400
  • 2008-2008 IC Corporation CE Integrated - Position: Main Drive
  • 2005-2006 IC Corporation CE Commercial
  • 2005-2007 International 8500 - Position: Fan, Alternator and Air Conditioning
  • 2005-2007 IC Corporation CE Integrated
  • 2005-2007 International 4300LP
  • 2005-2006 International 4400LP - Position: Fan, Alternator and Air Conditioning
  • 2008-2008 IC Corporation CE Commercial - Position: Main Drive
  • 2005-2007 International 4300
  • 2006-2006 International 7300 - Position: Fan, Alternator and Air Conditioning
  • 2005-2007 International 7400
  • 2005-2005 IC Corporation RE Integrated - Position: Fan and Alternator
  • 2005-2007 International 4400LP
  • 2005-2005 International 7300
  • 2003-2007 IC Corporation RE Commercial - Position: Fan and Alternator
  • 2006-2007 IC Corporation RE School Bus - Position: Fan and Alternator
  • 2003-2004 IC Corporation RE School Bus - Position: Fan and Alternator
  • 2007-2007 International 3200
  • 2005-2007 International 4400 - Position: Fan, Alternator and Air Conditioning
Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
Please, mind that only logged in users can submit questions

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