2015 6.7 Powerstroke Belt Diagram and Routing Guide

Ensure proper belt routing to maintain the functionality of your 2015 6.7 Powerstroke engine. Follow the exact path outlined in the belt diagram to avoid potential issues such as belt wear or component failure. Incorrect routing can cause damage to engine parts, leading to costly repairs. Make sure to consult the official diagram whenever replacing or adjusting the belts.
The serpentine belt system in the 2015 Powerstroke is designed to drive multiple accessories including the alternator, water pump, and AC compressor. Each belt must follow a precise route, passing over pulleys and tensioners that apply the correct amount of force. Misalignment of any of these components can lead to slippage or premature wear, significantly affecting engine performance.
Regular maintenance is necessary to ensure the belts are in good condition. Replace worn or cracked belts immediately. Use the factory-recommended parts and follow the manufacturer’s specifications for installation. This will help extend the life of your engine’s components and maintain optimal performance. Refer to the 2015 6.7 Powerstroke belt diagram to make sure the installation is done correctly every time.
2015 6.7 Powerstroke Belt Diagram

The 2015 6.7 Powerstroke engine uses a specific belt routing system to drive various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. Understanding the correct belt routing and tensioning is crucial for maintaining engine performance and avoiding unnecessary wear on components.
Below is a detailed diagram showing the routing of the serpentine belt system in the 2015 6.7 Powerstroke engine:
| Component | Location | Function |
|---|---|---|
| Alternator | Front, upper-left | Charges the battery |
| Power Steering Pump | Front, lower-left | Provides hydraulic pressure for steering |
| Water Pump | Front, lower-right | Circulates coolant through the engine |
| Air Conditioning Compressor | Front, upper-right | Controls air conditioning system |
| Crankshaft Pulley | Center | Drives the entire belt system |
To replace or adjust the serpentine belt, follow these steps:
- Locate the tensioner pulley and release tension on the belt using a suitable tool.
- Remove the old belt, taking note of the routing pattern.
- Route the new belt according to the diagram, ensuring proper alignment with each pulley.
- Reapply tension to the belt and double-check the routing and fit.
Proper tensioning is important to avoid belt slippage or premature wear. Always replace the belt if it shows signs of damage or excessive wear, such as cracking, fraying, or glazing.
How to Identify Each Belt in the 2015 6.7 Powerstroke Engine

Start by locating the serpentine belt, which runs around the engine’s main components, including the alternator, power steering pump, and AC compressor. This belt is the longest and most visible in the engine bay. It’s typically located on the front of the engine and is driven by the crankshaft pulley.
The second key belt is the accessory drive belt. It powers the water pump, air compressor, and other essential engine components. To identify it, look for a smaller belt routed around the auxiliary pulleys, separate from the serpentine belt. It often runs in parallel with the serpentine belt but serves different components.
If the engine has a timing belt system, it will be hidden under a cover, usually in the rear of the engine. Timing belts are smaller and have teeth to ensure accurate synchronization of the camshaft and crankshaft. You can identify it by looking for the timing cover, which typically requires removing some engine components to fully access it.
To confirm the belt sizes and configurations, check the belt routing diagram located on the engine bay or refer to the owner’s manual for the exact part numbers and specifications. This diagram will also help identify each belt by its precise route and attachment points.
For proper identification, always compare the belt lengths and installation routes to ensure you are replacing the correct part. If you’re unsure, it’s best to consult with a certified mechanic or refer to manufacturer documentation for additional guidance.
Step-by-Step Guide for Correct Belt Routing in 2015 6.7 Powerstroke

Begin by locating the tensioner pulley and loosening it to release tension from the belt. Use a ratchet or appropriate tool to rotate the tensioner counterclockwise and free the belt from the pulleys.
Next, identify the serpentine belt routing diagram located on the engine. This diagram provides a clear map of the path the belt must take around each pulley and component. It’s crucial to follow this routing to avoid misalignment and damage.
Start placing the belt over the crankshaft pulley, which is at the bottom of the engine. Then, guide the belt over the water pump, ensuring it sits properly in the grooves.
Move the belt to the alternator and power steering pump pulleys. Make sure the belt rests securely in place, avoiding any slack or overlap on the pulleys. Pay attention to the orientation of the belt to ensure it’s aligned correctly with each component.
After the alternator, the belt should go over the air conditioning compressor and then to the idler pulley. Keep the belt taut as you move it across the remaining pulleys, ensuring each section follows the correct path from the diagram.
Finally, double-check the routing around the tensioner pulley. The belt should loop over the tensioner, and the tensioner should apply appropriate tension to keep the belt tight. Rotate the tensioner back into place, securing it firmly.
Once the belt is correctly routed, manually rotate the engine using a ratchet or tool to ensure the belt moves smoothly across all pulleys. This ensures proper alignment and confirms the belt is securely installed.
If the belt runs smoothly without any slipping or rubbing, it is correctly routed. Re-check for any loose sections or misaligned pulleys, and adjust if necessary. Once confirmed, replace the engine cover and tighten any bolts you may have removed during installation.
Common Belt System Issues in 2015 6.7 Powerstroke and How to Fix Them
One of the most common belt system issues in the 2015 6.7 Powerstroke is a worn or cracked serpentine belt. This can lead to belt slippage or complete failure, causing the engine accessories to stop functioning. Inspect the belt regularly for visible signs of wear such as fraying or cracks.
- Solution: Replace the serpentine belt if any damage is found. Ensure the belt is routed correctly according to the diagram to avoid future issues.
Another issue often encountered is a misaligned pulley. A misalignment can cause uneven wear on the belt, leading to premature failure. This can be caused by a worn-out tensioner or a damaged pulley.
- Solution: Check the alignment of the pulleys using a straight edge. If any pulley is misaligned, replace the tensioner or the faulty pulley.
Loose or faulty tensioners can also affect the performance of the belt system. A faulty tensioner will not maintain the correct amount of tension on the belt, which can lead to slippage, noise, and premature belt wear.
- Solution: Test the tensioner by pressing down on the belt while the engine is off. If the tensioner does not move or has excessive play, replace it.
Lastly, belt squealing or whining noises are common signs of a failing belt system. This can be caused by the belt being too loose, contaminated with oil, or simply worn out over time.
- Solution: Clean the belt and pulleys to remove any oil or debris. If the squealing persists, check the belt tension and replace the belt if necessary.