6.0 and 6.7 Powerstroke Serpentine Belt Diagrams and Replacement
Ford 6.0 and 6.7 Powerstroke diesels drive accessories with a serpentine belt that must follow a specific path around the crankshaft, grooved pulleys, idlers, and automatic belt tensioner. A 6.7 Powerstroke serpentine belt diagram or a 6.0 Powerstroke serpentine belt diagram is useful only when it matches the engine, year, and installed equipment. Confirm routing and inspect the accessory drive belt with the engine off before planning replacement.
Identify the Engine and Accessory Drive Before Choosing a Diagram
The 6.0 Powerstroke and 6.7 Powerstroke do not share one accessory layout. Model year, engine identification on the vehicle, and the accessories present—air conditioning compressor, alternator, cooling fan drive, and extra idlers—determine which routing applies. A 6.0 Powerstroke serpentine belt diagram from a different year or option package can send the belt around pulleys that are not on the truck. Displacement alone is not enough to confirm fitment, because the same engine family can use more than one accessory drive arrangement.
Before comparing any diagram, shut the engine off, allow it to cool, remove the key, and keep hands clear of the belt drive. Look for an intact underhood belt routing label and compare it with vehicle-specific service information. Either source must match the pulleys actually installed, including grooved pulleys that take the ribbed face and any smooth idler pulley that rides the belt back. If the label is missing, damaged, or disagrees with the hardware, obtain configuration-specific routing before moving the belt.
Read the 6.7 Powerstroke Serpentine Belt Diagram
On a verified 6.7 Powerstroke serpentine belt diagram, start at the crankshaft pulley and identify every driven accessory, idler, and the automatic belt tensioner for that configuration. Trace the complete loop in the order shown so the path is continuous and no pulley is skipped. Do not invent a shortcut between neighboring pulleys; belt order is part of the drive design. Confirm that the diagram is for the same engine identification and accessory package as the truck, not merely a 6.7-liter diesel in general.
Diagram markings usually distinguish ribbed-side contact on grooved pulleys from belt-back contact on a smooth idler pulley or the tensioner face. Match those markings to vehicle-specific service information rather than assuming every wrap is ribbed. If a pulley on the diagram is missing on the engine, an unexpected accessory is present, or the drawing does not explain a belt crossing, stop. Those mismatches mean the diagram does not describe this accessory drive. Resolve the configuration before replacing the belt, because a misrouted accessory drive belt can walk off or wear rapidly.
Read the 6.0 Powerstroke Serpentine Belt Diagram
Match a verified 6.0 Powerstroke serpentine belt diagram to the installed accessory drive before following its path. Confirm pulley count, accessory locations, and automatic belt tensioner position against the engine, then follow the labeled pulleys through every direction change until the loop returns to the crankshaft. Those direction changes wrap grooved pulleys and a smooth idler pulley; skipping one wrap leaves an accessory undriven. Treat the 6.0 Powerstroke serpentine belt as a single continuous path, not nearby pulleys that can be connected in any order.
A photograph of the existing belt can supplement verified routing information by showing how the current belt sits on each pulley, but an installed belt may already be misrouted, stretched onto the wrong groove, or riding the wrong face. Use the photo only as a comparison, not as the authority. When the underhood belt routing label is missing or unreadable, obtain configuration-specific service information for that 6.0 Powerstroke before proceeding. Do not reconstruct routing from memory, photographs of a similar truck, or a diagram that does not match the accessories on this engine.
Check a 6.0 Powerstroke Belt for Wear and Fitment
With the engine off and cool, accessory drive inspection of a 6.0 Powerstroke serpentine belt should look for belt edge fraying, missing or cracked ribs, uneven wear along one edge, a glazed shiny face, and oil or coolant contamination. Fraying and edge wear often point to rib alignment or pulley tracking problems rather than simple age. Glazing and contamination reduce grip and can make the belt slip on grooved pulleys. Note which pulley the damage faces; that location helps a technician decide whether the belt, an idler, or alignment is involved.
Squealing or chirping can come from belt condition, lost tension, misalignment, a worn automatic belt tensioner, or a failing accessory bearing. Sound alone cannot identify the failed part, so do not replace the belt solely because it made noise. Confirm replacement specifications from the vehicle identification and accessory configuration, not from a generic 6.0 listing or how long the old belt looks. Apparent length can be misleading after stretch, wrong routing, or a missing idler. The correct accessory drive belt must match rib profile and the pulley arrangement actually on the engine.
Understand Replacement Requirements and Safety Limits
Plan replacement only after routing is verified, belt fitment is confirmed for this configuration, access to the automatic belt tensioner is adequate, and the applicable service procedure is available. The tensioner stores spring force. If access is restricted, tool placement is uncertain, or neighboring components block a controlled release, stop and arrange professional service rather than improvising leverage. A 6.7 Powerstroke serpentine belt diagram or a 6.0 routing drawing is a planning aid, not a substitute for the procedure that belongs to that vehicle.
When a damaged belt is removed, a technician should assess the automatic belt tensioner, idlers, pulley alignment, and any oil or coolant contamination that may have caused the failure. Installing a new belt over a seized smooth idler pulley, a weak tensioner, or a misaligned grooved pulley often repeats the same wear. Before the engine is operated, confirm the belt is seated, rib alignment is correct on every grooved pulley, and the path matches the verified diagram. Do not start the engine to check tracking until those static checks are complete.
Recognize Problems That Need Professional Testing
A belt that repeatedly walks off, shreds, or keeps making noise after a recent change needs accessory-drive diagnosis, not another unverified replacement. Visual accessory drive inspection can show obvious belt edge fraying, missing ribs, or a pulley that does not turn freely by hand with the engine off, but it cannot fully judge bearing condition inside an accessory, small pulley misalignment, or automatic belt tensioner damping and spring performance. Those faults often require measurement and comparison to vehicle-specific information. Repeating a 6.0 Powerstroke serpentine belt or 6.7 belt change without that diagnosis can destroy the new belt quickly.
If belt failure coincides with warning indicators, rising coolant temperature, or loss of charging, steering assist, or other normal function, stop safely and shut the engine off. A displaced, shredded, or missing accessory drive belt can leave cooling and charging without drive. Do not continue driving to diagnose the noise. Arrange professional assessment before further driving when the belt is off the pulleys, severely damaged, or gone. A technician can confirm routing against a 6.7 Powerstroke serpentine belt diagram or matching 6.0 information and test the drive components that visual checks cannot prove.