Chrysler 5.7 Hemi Serpentine Belt Diagram Locate the Tensioner Fast

Here's the precise method to locate and operate the serpentine belt tensioner on Chrysler/Dodge/Jeep vehicles with the 5.7L Hemi engine:

Locating the Serpentine Belt Tensioner Fast

The automatic tensioner assembly is mounted to the engine block. Identify it quickly using these markers:

• Location: On the front of the engine, centered near the bottom of the accessory drive system. It's positioned between the alternator (typically driver-side) and the power steering pump (typically passenger-side).
• Key Identifier: Look for the prominent hexagonal casting (approx. 3/4" or 19mm) stamped into the tensioner arm itself. This is the tensioner pulley's mounting point.
• Pulley Type: The tensioner runs on the smooth backside of the serpentine belt (non-ribbed side).

Operating the Tensioner

1. Direction: To release tension and remove the belt, rotate the tensioner arm clockwise (viewed from the front). Apply force towards the passenger side of the vehicle.
2. Tool Required: Insert a long-handled 1/2" drive ratchet or breaker bar directly onto the hexagonal socket cast into the tensioner arm. A specialized serpentine belt tool is highly recommended for optimal leverage and safety.
3. Action: Apply significant clockwise force to the ratchet/breaker bar. This compresses the tensioner spring, loosening belt tension.
4. Slack Management: While holding the tensioner fully compressed, quickly lift the belt off the lowest pulley (usually the crankshaft pulley). Twist the belt sideways slightly during removal to prevent it from catching.

Critical Safety Notes

• Confirm Direction: Always double-check the rotation direction (clockwise) before applying force. Incorrect rotation can damage the tensioner mechanism.
• Leverage: Use the longest breaker bar or ratchet handle possible. The tensioner spring requires substantial force.
• Clearance: Ensure the ratchet has a clear swing path away from surrounding components like the radiator hose or fan.
• Hand Placement: Keep hands clear of pinching points. Avoid placing fingers between the belt and pulleys when applying tension.

Rib Identification: Before reassembly, verify the belt routing diagram matches your vehicle configuration. Trace the belt path starting from the crankshaft pulley using the "R" (ribbed side) markers on the diagram as a guide.