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Thomas Belt Tensioner

2 items

Upgrade your vehicle's belt tensioner with A-Premium's high-quality options. Choose reliability and durability for a smoother ride.

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Belt Tensioner with Pulley for Ford F650 F750 Freightliner Sterling Truck ThomasBelt Tensioner with Pulley for Ford F650 F750 Freightliner Sterling Truck Thomas
A-Premium®Part # APBT0254
Belt Tensioner with Pulley for Ford F650 F750 Freightliner Sterling Truck Thomas
4.514 Reviews
CA$66.99
CA$70.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005 - 2008 Blue Bird Vision School Bus, 2009 - 2009 Blue Bird Vision School Bus, 2004 - 2007 Ford F650, 2004 - 2007 Ford F750, 2005 - 2008 Freightliner B2, 2002 - 2003 Freightliner M2 106, 2004 - 2004 Freightliner M2 106, 2005 - 2007 Freightliner M2 106, 2004 - 2005 Freightliner M2 106, 2006 - 2006 Freightliner M2 106, 2007 - 2007 Freightliner M2 106, 2004 - 2005 Freightliner M2 112, 2006 - 2006 Freightliner M2 112, 2007 - 2007 Freightliner M2 112, 2005 - 2007 Sterling Truck A9500, 2005 - 2005 Sterling Truck L7500, 2006 - 2006 Sterling Truck L7500, 2005 - 2005 Sterling Truck L8500, 2006 - 2006 Sterling Truck L8500, 2005 - 2005 Sterling Truck LT7500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Thomas
Item LocatedCanada
Quantity1
MaterialSteel
ConditionNew
item #1004WCXY
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Belt Tensioner with Pulley for Ford F-600 1992-1994 F-700 Freightliner L6 5.9L
A-Premium®Part # APBT0328
Belt Tensioner with Pulley for Ford F-600 1992-1994 F-700 Freightliner L6 5.9L
4.514 Reviews
CA$57.99
CA$60.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2007 - 2007 Blue Bird All American FE, 2007 - 2007 Blue Bird Vision School Bus, 1995 - 1998 Ford B800, 1992 - 1994 Ford F600, 1993 - 1994 Ford F600 LPO, 2005 - 2007 Ford F650, 1992 - 1996 Ford F700, 1997 - 1997 Ford F700, 1993 - 1994 Ford F700 LPO, 2005 - 2007 Ford F750, 1993 - 1996 Ford F800, 1997 - 1998 Ford F800, 1999 - 1999 Ford F800, 1995 - 1996 Ford F800 LPO, 1997 - 1998 Ford F800 LPO, 1993 - 1997 Ford LN7000, 1999 - 1999 Freightliner FC70, 2000 - 2000 Freightliner FC70, 2001 - 2003 Freightliner FC70, 2004 - 2004 Freightliner FC70
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Thomas
Item LocatedCanada
Quantity1
ConditionNew
item #1000G1YT
Note
This item comes with the Pulley.
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What does a belt tensioner do?

Seat belt tensioners represent an integral facet of contemporary automotive safety systems. These sophisticated devices are meticulously engineered to augment passenger protection by mitigating the potentially injurious effects of a vehicular collision or abrupt deceleration event. 

Belt tensioner noise

Belt tensioner noise is typically an indication of a problem within the engine's accessory drive system, and it should not be ignored.

Squealing or Whining Noise: A common sign of a failing or worn-out belt tensioner is a high-pitched squealing or whining noise. This noise is often most noticeable when you start the engine or when you engage accessories like the air conditioner or power steering.

Rattling or Grinding Noise: A failing tensioner may also produce a rattling or grinding noise, especially at higher engine speeds or when the drive belt is under load.

Intermittent Noise: The noise produced by a failing belt tensioner can be intermittent, depending on factors like engine temperature and load.

Belt tensioner replacement

Replacing a belt tensioner is a relatively straightforward mechanical procedure, but it does require some mechanical knowledge and the right tools. Steps to follow when you are planning to replace your seal belt tensioner.

  1. Safety first: Ensure the engine is off, and the vehicle is secure. Disconnect the battery if necessary.
  2. Locate tensioner: Find the belt tensioner, usually a pulley on a bracket with a spring-loaded arm.
  3. Release belt tension: Use the right tool to rotate the tensioner arm, relieving tension on the drive belt.
  4. Remove belt: Carefully slide the belt off the pulleys. Note routing for reference.
  5. Remove old tensioner: Unbolt the old tensioner, keeping track of the hardware.
  6. Install new tensioner: Place the new tensioner in the same spot and secure it with bolts. Align it correctly.
  7. Reinstall belt: Put the belt back on the pulleys, ensuring proper alignment.
  8. Adjust tension: Use the tool to apply tension and follow the manufacturer's specs.
  9. Double-check: Confirm belt alignment and tension on all pulleys.
  10. Test: Start the engine, listen for issues, and check belt movement.
  11. Reconnect battery: If disconnected earlier, reconnect the vehicle's battery.
  12. Dispose of old parts: Properly dispose of the old tensioner and parts.

Related Blogs

Should You Replace the Tensioner When Replacing a Cracked Serpentine Belt?

Don't automatically replace the tensioner with a cracked serpentine belt. Check for weak spring force, misalignment, or noise. Replace both if the tensioner is worn; otherwise, swapping just the belt is often sufficient.

Aug 28, 2026