For the 2013 Nissan Altima 2.5L (QR25DE engine), accessing the correct serpentine belt routing diagram is essential. Follow these methods:
Primary Methods to Find the Belt Diagram
- Underhood Decal: Open the hood and inspect the underside. Locate a large sticker typically placed on the radiator support, strut tower, or fan shroud. This decal explicitly shows the belt path diagram.
- Owner's Manual: Consult the vehicle's owner's manual. The maintenance section often includes the belt routing diagram.
If the Decal is Missing/Faded
- Manual Routing Method: Carefully note the belt's existing path around all pulleys before removal. Sketch it precisely or take multiple clear photos from different angles.
Standard Routing for 2013 Altima 2.5L
| Component | Routing Order (Common Path) |
|---|---|
| Crankshaft Pulley | Start Here |
| Idler Pulley | Next (Above or below crank) |
| Air Conditioner Compressor | Grooved Side |
| Power Steering Pump | Grooved Side |
| Automatic Tensioner Pulley | Smooth Backside |
| Alternator | Grooved Side |
| Water Pump Pulley | Final Grooved Pulley |
Important Notes:
- Verify routing against the physical engine decal or manual as primary source.
- New belts often have directional arrows. Ensure arrows align with rotation direction during installation.
- Release tension slowly using the automatic tensioner (typically 3/8" or 1/2" square drive).