Dayco 89455 belt tensioner for the 2010-2015 Freightliner M2 106 6-cylinder 6.4L and other vehicles holds the serpentine drive belt at working tension. Depending on the application, it tensions the belt that drives the air conditioning, fan, alternator, water pump or main drive.
- Automatic type tensioner
- Made for a serpentine belt
- Single flat pulley, 74 mm in diameter
- Clockwise direction
Quick facts
- Part: Dayco 89455 belt tensioner
- Also called: serpentine belt tensioner
- Fits: the 2010-2015 Freightliner M2 106 6-cylinder 6.4L and other vehicles
- Position: Air conditioning; fan and alternator; fan; fan, alternator and air conditioning; water pump; main drive
- Condition: New
A serpentine belt tensioner that is wearing out can show up as belt squeal, a fluttering belt or a rattle at the pulley. These signs alone do not prove the tensioner is the problem, since a glazed or worn belt can make the same noise.
Fits
The 2005-2008 Freightliner B2 6-cylinder 6.4L, the 2006-2007 B2 4-cylinder 4.3L, the 2007-2008 B2 6-cylinder 7.2L, the 2006 Freightliner FS65 4-cylinder 4.8L, the 2006-2008 FS65 6-cylinder 6.4L and the 2007 FS65 4-cylinder 4.3L all fit this tensioner, and so do many other vehicles, at one tensioner per vehicle. If your truck is not named here, open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Air conditioning; fan and alternator; fan; fan, alternator and air conditioning; water pump; main drive
- Quantity per vehicle: 1
- Number of pulleys: 1
- Pulley diameter: 74 mm
- Pulley width: 34 mm
Build and materials
- Type: Automatic
- Belt type: Serpentine
- Direction: Clockwise
- Pulley: flat
- Condition: New
Interchange: 680087 · 38567 · 49561 · 910552A
This part cross-references / interchanges with the following part numbers:
680087, 38567, 49561, 910552A, A9062002470, A9062003170
Frequently Asked Questions
Does the Dayco belt tensioner assembly 89455 fit the 2010-2015 Freightliner M2 106 6-cylinder 6.4L?
Yes. Dayco 89455 fits the 2010-2015 Freightliner M2 106 6-cylinder 6.4L, at one tensioner per truck.
What size is the pulley on this Dayco automatic belt tensioner?
Dayco 89455 has one flat pulley that is 74 mm in diameter and 34 mm wide.
Which belt type and direction is this Dayco tensioner made for?
This tensioner is an automatic type for a serpentine belt, and its direction is clockwise.
How can I tell if this tensioner pulley is worn?
With the engine off and cool, look for cracks or rust on the tensioner and a pulley that wobbles or feels rough. Belt squeal or a fluttering belt in normal driving can also be a sign.
Is 680087 an interchange number for the Dayco 89455 tensioner?
Yes. 680087 is one of the interchange numbers listed for Dayco 89455; the rest are on the Interchange line.
