Dayco 5080957 serpentine belt for the 2007-2010 Peterbilt 386 12.5L and other vehicles transfers engine power to the belt-driven accessories. This Dayco serpentine belt is for the main drive, which runs the fan, alternator and air conditioning.
With the engine off, look along the ribs. Cracks, fraying or a squeal at start-up can mean the belt is worn, though a tired tensioner or a misaligned pulley can be behind the noise.
It is listed for a wide range of Peterbilt, Ford and Kenworth models, including the 2008-2010 Ford F-250 Super Duty V8 6.4L and the 2008-2010 Ford F-350 Super Duty V8 6.4L. If your truck is not one of these, open the Buyer's Guide tab and look up your exact model and engine.
Fit and size
Build and materials
One serpentine belt. This listing is one belt, and each vehicle takes one.
Interchange: JK8-963 · JK8-963A · 25-080956 · 25-080956HD
8K956 · K080956HD · 8PK2430 · 8PK2440 · K080956 · 4080956 · JK8962 · JK8962A
This part cross-references / interchanges with the following part numbers:
Is Dayco 5080957 the Ford F-250 Super Duty serpentine belt for the 2008-2010 V8 6.4L?
Yes. Dayco 5080957 is listed for the 2008-2010 Ford F-250 Super Duty V8 6.4L, and the truck takes one belt.
Will this Ford F-350 Super Duty serpentine belt fit a 2008-2010 V8 6.4L truck?
Yes. This belt is listed for the 2008-2010 Ford F-350 Super Duty V8 6.4L, and the truck takes one.
What is this Dayco drive belt made of?
Dayco 5080957 is made of EPDM with aramid reinforcement. It has a straight rib profile, a K-section cross section and standard rib depth.
What temperatures can this Dayco fan belt run in?
This serpentine belt has an operating temperature range of -45 °F to 212 °F (-42.7 °C to 100 °C). It is made to SAE J1459 and SAE J2432 standards.
What should I look for when inspecting the ribs of this serpentine belt?
With the engine off and cool, look along the ribs for cracks, fraying or a shiny glazed surface. Any of these can mean the belt is worn.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
