Dayco 89490 belt tensioner for the 2012-2017 Peterbilt 337 6-cylinder 6.7L and other vehicles keeps tension on the serpentine drive belt. This Dayco belt tensioner sits in the accessory belt path and helps stop the belt from slipping on its pulleys.
- Dayco automatic belt tensioner built for a serpentine belt
- Counter-clockwise direction
- One flat pulley, 74 mm in diameter and 32.8 mm wide
- Listed for alternator, air conditioning, fan, water pump and main drive belt positions
Quick facts
- Part: Dayco 89490 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2012-2017 Peterbilt 337 6-cylinder 6.7L and other vehicles
- Position: Alternator and air conditioning, fan and alternator, fan, water pump, main drive, smooth pulley
- Condition: New
Belt squeal or chirp, a belt that slips, or uneven belt wear can mean the tensioner is weak. Those signs alone do not prove the tensioner is at fault, since a glazed or worn belt is another common cause. If a worn tensioner is the cause, this one replaces it.
Fits
The 2012-2017 Peterbilt 337 6-cylinder 6.7L, the 2014-2017 Peterbilt 325 and the 2004-2005 Freightliner MT45 4-cylinder 3.9L or 6-cylinder 5.9L take this tensioner, as do many other Ford, Freightliner, Sterling, Kenworth and Thomas vehicles. The fitment calls for one per vehicle. For any other vehicle, look up its year and engine in the "Vehicles it fits" section on this page.
Specifications
Fit and size
- Position: Alternator and air conditioning, fan and alternator, fan, water pump, main drive, smooth pulley
- Quantity per application: 1
- Number of pulleys: 1
- Pulley diameter: 74 mm
- Pulley width: 32.8 mm
Build and materials
- Type: Automatic
- Direction: Counter-clockwise
- Belt type: Serpentine
- Pulley face: Flat
- Condition: New
Interchange: 38517 · 49517 · 45825 · 910007A · VKM910007 · 910007
This part cross-references / interchanges with the following part numbers:
38517, 49517, 45825, 910007A, VKM910007, 910007, 3924026, 3929428, 3930269, 3930769, 3934814, 3934815, 3934816, 3936197, 3936198, 3957433, 3976833, 3978021, D1186-2419
Frequently Asked Questions
Is the Dayco tensioner right for the 2014-2017 Peterbilt 325?
Yes. Dayco 89490 fits the 2014-2017 Peterbilt 325, and the fitment calls for one tensioner per truck.
Does Dayco 89490 fit the 2004-2005 Freightliner MT45 4-cylinder 3.9L or 6-cylinder 5.9L?
Yes. Dayco 89490 is listed for the 2004-2005 Freightliner MT45 with either the 4-cylinder 3.9L or the 6-cylinder 5.9L engine.
What size is the pulley on the Dayco belt tensioner assembly?
This tensioner has one flat, smooth pulley that is 74 mm in diameter and 32.8 mm wide.
Is this serpentine belt tensioner automatic or manual?
This tensioner is automatic and made for a serpentine belt, and its direction is counter-clockwise.
Does Dayco 89490 replace the tensioner numbered 910007A?
Yes. 910007A is one of the numbers Dayco 89490 replaces; the rest are on the Interchange line.
