Belt Tensioner
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Belt Tensioner
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Dayco No Slack Belt Tensioner

Part No. 89231 Warranty  

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Dayco No Slack Automatic Belt Tensioners are specifically built to outperform and outlast competitive OE parts. The heavy duty cast aluminum spring case resists cracking and fatigue. Each component is built to resist rust, endure the toughest of conditions while promoting quieter performance and longer life.

Product Features:
  • Manufactured with a specially coated patented flat wire spring to allow the internal tension to be concentric, thus providing a more even degree of constant tension
  • Contains a metallic locator pin built to withstand extreme drive demands and properly locate the tensioner for installation
  • The patented Deflected Arm Plate dampens arm movement, prolonging the life of the tensioner by limiting the amount of rotational movement
  • This tensioner includes the required hardware for proper installation
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Belt Type:Serpentine
Mounting Type:Automatic
Pulley Diameter:70 in
Pulley Material:Polymer
Pulley Type:Grooved
Pulley Width:28.3 in

REVIEW SNAPSHOT®

by PowerReviews
Dayco No SlackBelt Tensioner
 
4.2

(based on 42 reviews)

Ratings Distribution

  • 5 Stars

     

    (24)

  • 4 Stars

     

    (12)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (4)

90%

of respondents would recommend this to a friend.

Pros

  • Easy to install (34)
  • Durable (15)
  • Improves engine efficiency (13)
  • Lightweight (11)
  • Increases power (5)

Cons

  • Difficult to install (4)
  • No improvement in performance (3)

Best Uses

  • Everyday driving (26)
  • Replacement (22)
  • Restoration (10)
  • Performance driving (3)
    • Car & Truck:
    • Casual driver (10), Mechanic (7), Truck enthusiast (4), Auto enthusiast (3)
    • Reviewer Profile:
    • Casual driver (12), Truck enthusiast (8), Auto enthusiast (7), Mechanic (7)

Most Liked Positive Review

 

LOOKS LIKE OEM PARTS. JUST PERFECT.

VERY GOOD STRONG TENSION, IMPROVES PERFORMANCE, NON SLIPPING CLAUSES. TURNS ENGINE TIGHT WITHOUT WOBBLY! CHANGE SEPERTINE BELT WHEN INSTALL, THE BETTER AT ONCE SAMETIME INSTALL.

VERY GOOD STRONG TENSION, IMPROVES PERFORMANCE, NON SLIPPING CLAUSES. TURNS ENGINE TIGHT WITHOUT WOBBLY! CHANGE SEPERTINE BELT WHEN INSTALL, THE BETTER AT ONCE SAMETIME INSTALL.

VS

Most Liked Negative Review

 

expected longer life

If you need one of these go with "Gates" They specialize in them as well as serpentine belts. You pay a little more, but you get what you pay for

If you need one of these go with "Gates" They specialize in them as well as serpentine belts. You pay a little more, but you get what you pay for

Reviewed by 42 customers

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Displaying reviews 1-10

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5.0

SCREECCCCCCHHHHHH

By 1 HANDED BANDIT

from NC

About Me Casual Driver

Level 2

Pros

  • Durable
  • Easy To Install
  • Improves Engine Efficiency
  • Lightweight

Cons

  • none

Best Uses

  • Everyday Driving
  • Replacement
  • Restoration

Comments about Dayco No Slack Belt Tensioner:

Had to stop the loud screeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeccccccccccccccccccccccccccccccccccccccccccccccccccccccccchhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhiiiiiiiiiiiinnnnnnnnnnnnnnnnnnnnnnnnnnggggggggggggggg noise due to the bearing in this part wearing out i guess. It is so annoying and i could not take it anymore. I installed this part in about 15 minutes and also replaced the serpentine belt that had appeared to have not been changed in the past 10 years haha. All is well now.

Comment on this review(earn points)

 
4.0

Live and learn.

By DIY Tom

from Brandon, Fl.

About Me Casual Driver, Mechanic

Verified Buyer
Level 1

Pros

  • Durable
  • Improves Engine Efficiency
  • Lightweight

Cons

  • Difficult To Install
  • Had To Unbolt Alternator

Best Uses

  • Replacement

Comments about Dayco No Slack Belt Tensioner:

With belt tensioner pulled all the way, still couldn't get the belt installed. Unbolted the alternator which gave enough slack to install. No slack on tensioner with the belt installed. After driving a few miles, there was about 1/4" slack. I had lots of noise before installing and the old tensioner was wobbling a small amount. The new tensioner has no wobble and the noise is gone. I thought I had a bearing going bad in the alternator or idler pulley. Replaced idler pulleys first which was needed. Even the pulley on the belt tensioner. Live and learn.

Comment on this review(earn points)

 
4.0

Recommend... Perfect Replacement

By DrA

from Ohio

About Me Auto Enthusiast, Mechanic, Truck Enthusiast

Ask me a question

Verified Buyer
Level 3

Pros

  • Easy To Install
  • Lightweight

Cons

    Best Uses

    • Replacement
    • Restoration

    Comments about Dayco No Slack Belt Tensioner:

    Glad I replaced mine (did when I redid the radiator and water pump)... didn't have any symptoms but the original piece had stress cracks and the spring was weakened (~115k miles). Don't skimp... do it.

    Comment on this review(earn points)

     
    5.0

    Worked Great for my 1998 5.7 Chevy 1500

    By Spiff45

    from Troy IL

    About Me Mechanic

    Verified Buyer
    Level 3

    Pros

    • Easy To Install

    Cons

      Best Uses

      • Replacement

      Comments about Dayco No Slack Belt Tensioner:

      Like every other comment on here. Super simple install, one bolt. I didn't use the bolt it came with the new tensioner, I just used the stock one. This fit perfect for my 1998 Chevrolet 1500 5.7.

      Comment on this review(earn points)

       
      5.0

      great fit

      By uncle ray

      from atlanta ga

      About Me Truck Enthusiast

      Pros

      • Easy To Install

      Cons

        Best Uses

        • Everyday Driving

        Comments about Dayco No Slack Belt Tensioner:

        was very easy to install after I made sure I had the few tools I need took about 5 min on my 2005 chevy pick up

        Comment on this review(earn points)

         
        4.0

        Replacement a breeze

        By Old Gemsee owner

        from Eau Claire, WI

        About Me Truck Enthusiast

        Verified Buyer

        Pros

        • Durable
        • Easy To Install

        Cons

          Best Uses

          • Replacement

          Comments about Dayco No Slack Belt Tensioner:

          Thought my alternator was bad looked under hood and old tensioner was bad. Wow! that was alot easier and cheaper fix. They refunded the alternator too easy.

          Comment on this review(earn points)

           
          4.0

          good tensioner

          By Swede

          from Fort Myers, Fl

          About Me Casual Driver

          Verified Buyer
          Level 1

          Pros

          • Durable
          • Easy To Install

          Cons

            Best Uses

            • Everyday Driving

            Comments about Dayco No Slack Belt Tensioner:

            Easy to install!

            Comment on this review(earn points)

            (2 of 6 customers found this review helpful)

             
            5.0

            Easy to Install

            By irishmjk

            from Brandon. Fl

            About Me Truck Enthusiast

            Ask me a question

            Level 3

            Pros

            • Durable
            • Easy To Install

            Cons

              Best Uses

              • Everyday Driving

              Comments about Dayco No Slack Belt Tensioner:

              Removed and installed in less than 15 minutes. comes with new bolt and washer. Be sure to clean the mating surfaces before instlling new tensioner.

              Comment on this review(earn points)

              (3 of 6 customers found this review helpful)

               
              4.0

              Easy as pie

              By truck lover

              from Bethlehem, PA

              About Me Casual Driver

              Ask me a question

              Verified Buyer
              Level 3

              Pros

              • Durable
              • Easy To Install
              • Improves Engine Efficiency
              • Increases Power
              • Lightweight

              Cons

                Best Uses

                • Everyday Driving
                • Replacement
                • Restoration

                Comments about Dayco No Slack Belt Tensioner:

                I had no idea what I was doing but this turned out to be surprisingly simple to install. I replace the belt tensioner, idler pulley and belt and since then it has been smooth and quiet. Look for coupon codes! I was able to but about $300 worth of parts for about $100!

                Comment on this review(earn points)

                (3 of 6 customers found this review helpful)

                 
                5.0

                as expected

                By Bill

                from deltona, fl

                About Me Auto Enthusiast

                Verified Buyer
                Level 2

                Pros

                • Easy To Install

                Cons

                  Best Uses

                  • Replacement

                  Comments about Dayco No Slack Belt Tensioner:

                  Part replacement

                  Comment on this review(earn points)

                  Displaying reviews 1-10

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                  Do you have questions about this product?(earn points for answers!)

                   

                  Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                  5 Questions | 7 Answers
                  Displaying questions 1-5
                  • Q:

                    I have used two of these (thought first was defective) with two of the dayco poly rib belts, and the belts are stretching out to full tensioner extension within a few days. Then squeaks upon startup. What is the problem? The belts are the right size, having almost all of the tension left on the tensioner when installed. Both times the belt and tensioner were new. Vehicle has new alt, a/c compressor, water pump, and idler pulley as well. 98 chevy blazer.
                    Asked on 10/14/2012 by matt from Inthewoods, NC

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Sorry, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                      Answered on 10/15/2012 by Steve from AAP
                  • Q:

                    how do i remove it
                    Asked on 8/25/2012 by na from co

                    1 answer

                    • CUSTOMER CARE

                      A:

                      We would need more information like year, make, model and engine specification of your vehicle before we can make a suggestion. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                      Answered on 8/25/2012 by Rick from AAP
                  • Q:

                    first, can a bad tensioner pulley make the engine preform like it has an ignition problem? such as needing a tune up. Secondly, is the tensioner pulley supposed to move up and down when the engine is running
                    Asked on 8/5/2012 by pappy from pasadena Md.

                    1 answer

                    • CUSTOMER CARE

                      A:

                      The belt tensioner is a crucial part of any engine. Its functions include tightening the engine belt and transferring power through pulleys from the serpentine belt to the alternator. It is responsible for generating the correct amounts of tension to allow the engine to run and drive its components. Belt tensioners lose their strength and efficiency over time, which can lead to an engine failure if the belts aren't replaced. It's helpful to know the signs that the tensioner is worn or needs replacement. The car battery light will light up when the belt tensioner is failing. The battery will begin to run down due to the fact that the belt is slowing down and slipping out of its compartment. In addition, the alternator will no longer turn fast enough to power the battery. One of the main signs that a belt tensioner needs replacement is the looseness of the belt. Listen for a fluttering" noise while driving or while the car is idling. This indicates the tensioner is too loose. Other noises such as squealing or whirling from the front of the engine mean the spring inside the tensioner is weakening. In this case, the belt tensioner needs to be replaced. Rust or corrosion can build up around the tensioner, as well as dirt and mud. Rust prevents the tensioner from spinning freely, which can cause further damage to the engine. Corrosion can occur in areas with a colder climate, and where roads are heavily salted during winter. Rust also tends to distribute into other parts of the engine, including the alternator. Any damage to the automatic tensioner pulley can cause damage to the belt tensioner due to the vibrations caused by the pulley. Physical damage to the pulley is an indication of extreme tension or physical interference. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

                      Answered on 8/6/2012 by Vincent from AAP
                  • Q:

                    Can a bad belt tensioner drain your battery? When I drive it makes a noise and my battery goes dead. I have a new alternator and a new battery. My amp guage shows only 10 amps instead of 14. Its not holding a charge. My truck has 190,000 miles on it. Could it be the problem?
                    Asked on 1/22/2012 by joe from alexandria, ohio

                    1 answer

                    • CUSTOMER CARE

                      A:

                      This could possibly be the problem. However, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis.

                      Answered on 1/22/2012 by DIY Daniel from AAP
                  • Q:

                    can you tell me if this tensioner cmes with the pully wheel or not ? also is there a heavy duty version of this tensioner? i have a 2000 chevy express with 5.7 liter eng w/ac front and back in a conversion van! thank you jim..
                    Asked on 7/2/2010 by buddaman1260 from orlando ,fl

                    3 answers

                    • CUSTOMER CARE

                      A:

                      Yes the tensioner comes with the pulley.

                      Answered on 7/9/2010 by Kevin from AAP
                    • A:

                      Yes it does come with the pulley wheel & bearing. Buddaman there description of Light duty pertains to Heavy Equipment applications where the engine is spinning at a constant Hi-RPM. This product will perform just fine in our highway vehicles.

                      Answered on 12/24/2010 by I R Mechanic from Chicago, IL
                    • VERIFIED BUYER

                      A:

                      Yes, the tensioner comes with a pulley wheel. However there is another idler pulley on the 5.7 that is sold separately.I do not know if a heavy duty model is available, but this is the stock replacement part.

                      Answered on 9/17/2010 by Bigone from Georgia
                  Displaying questions 1-5

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