Duralast/Belt Tensioner

Vehicle Specific
Part Number: 305321
Warranty: 1 YR
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Ships within 1-2 business days.
Price: $67.99
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Features & Benefits

Duralast™ Automatic Belt Tensioners are made by Dayco; this Duralast™ Integral tensioner is specifically built to outperform and outlast competitive OE parts. Each component is built to resist rust, endure the toughest of conditions while promoting quieter performance and longer life.

  • This Duralast Automatic Belt Tensioner is 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
  • The patented Deflected Arm Plate dampens arm movement, prolonging the life of the tensioner by limiting the amount of rotational movement
  • The heavy duty cast aluminum spring case resists cracking and fatigue
  • Made in the USA
Product Details
Part Number: 305321
Weight: 3.35 lbs
Warranty: 1 YR
Package Contents: 1 EA
Product Condition: New
Pulley / Belt Type: Serpentine
Pulley Bearing Inside Diameter (1) (mm): 17
Pulley Diameter (1) (mm): 76
Pulley Material (1): Steel
Pulley Quantity: 1
Pulley Width (1) (mm): 37
Tensioner Rotation: Counter Clockwise
Tensioner Style: Automatic - Spring
Shipping Information: Overnight and Two Day shipping are not available for PO Box, APO/FPO/DPO or US Territory addresses.
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    Duralast/Belt Tensioner

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    This review is hidden because you have chosen to ignore Member 2827635. Show DetailsHide Details

    Get the OEM part if you have a 2004 CR-V and save yourself a lot of time

    1 of 1 people found this helpful

    Set out to change serpentine belt and tensioner on my 2004 Honda CR-V w/ 2.4L DOHC. Couldn't get the belt off with anything I had including a Craftsman serpentine belt tool set so I forked over the cash and special ordered the factory equivalent tool through another channel. The OEM tensioner pulley bolt was 14mm and I was easily able to take the belt off using the special tool. Swapped out the tensioners and as I went to put on the new belt the first issue I ran into was the Duralast tensioner pulley bolt head was 15mm instead of 14mm. So after one use my 14mm factory tool was already going to the back of the toolbox (no returns on special orders). I then took out my Craftsman serpentine belt tool and installed the belt, at which time we had the second issue... I could not get the serpentine belt tool off of the pulley once it was in the tensioned position. The pulley on this Duralast tensioner sticks out a lot further than the OEM unit, and right across from the pulley on the frame was a metal bracket that holds the lower power steering hose. The serpentine belt tool was hitting the bracket and there was not enough space to twist it off of the pulley bolt. I then had to take the serpentine belt back off again, remove the bolt holding the power steering hose/ bracket to push it aside, and then put the belt back on a second time. Afterwards, with the larger Duralast tensioner pulley in the way, it took many attempts working at the tips of my fingers in a very small space to finally get the power steering bracket bolt reinstalled. I was not happy with the extra time this aftermarket tensioner cost me. In the end, if I ever have to take the serpentine belt off again, it's almost certain that I'll install an OEM tensioner at that time...

    Pros: Low cost, got a rebate for buying a belt at same time, Made in USA

    Cons: Pulley bolt wrong size, pulley is too big compared to OEM

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    These parts DO NOT fit your selected vehicle.
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