2023-2025 Jeep Wrangler Engine Rattle Noise TSB

Owners of 2023-2025 Jeep Wrangler, Gladiator, RAM 1500, Dodge Durango, and Grand Cherokee models may experience an Engine Rattle Noise coming from the engine. This issue, detailed in Stellantis TSB S2509000001 Rev. B, outlines a diagnostic process to identify if the noise is related to the intake phaser and provides instructions for its replacement.

Symptoms

The primary symptom is a persistent Engine Rattle Noise that originates from the engine compartment. This noise is often noticeable after starting the engine and may change under certain conditions.

Diagnosis / Trigger Conditions

To properly diagnose the Jeep Wrangler engine rattle noise and determine if it's phaser-related, technicians should follow a specific procedure:

1. Ensure the engine reaches its normal operating temperature, between 194°F and 230°F. Once at temperature, turn the engine off.
2. Restart the engine and wait 30 seconds. The rattling noise should be present during this time.
3. Step on the gas pedal. The noise should temporarily disappear. Release the gas pedal, and the noise should return. Repeat this action three times. If this behavior is observed, the noise is likely phaser related.
4. Using a stethoscope, pinpoint the exact bank of the engine where the noise is loudest. There is a high probability the noise will emanate from the right bank.
5. Remove the intake phaser actuator from the front of the valve cover on the side of the engine where the noise is heard. Refer to the vehicle's service information for the specific removal procedure.
6. With the engine running and the noise present, locate the exposed "button" on the end of the oil control valve (OCV) within the intake phaser. Depress this button using a suitable pencil-sized non-metallic dowel or rod.
7. If the Engine Rattle Noise comes and goes as the OCV button is pressed and released, the intake phaser is the likely suspect and should be replaced.

Repair Procedure Summary

If the diagnostic steps confirm a faulty intake phaser, the repair involves replacing the component. Technicians are advised to consult the latest published service procedure in the Service Library. However, if there are discrepancies, the procedure outlined in TSB S2509000001 Rev. B should be followed. It is crucial to read the entire procedure before beginning any work.

The repair process includes specific instructions for tool usage and lubrication:

• When torquing the OCV after intake phaser replacement, DO NOT use the camshaft phaser holding tool (Tool #2025102090). This tool is specifically prohibited for this step.
• Instead, DO use the cam holding tool (Tool #2025200090) while torquing the OCVs.
• After positioning the intake phaser on the camshaft, the front face of the phaser that contacts the OCV must be lubricated with clean engine oil. However, DO NOT lubricate the rear face of the phaser that contacts the camshaft.

Required Tools or Parts

For the correct diagnosis and repair of the Jeep Wrangler engine rattle noise, specific tools are required:

• Camshaft phaser holding tool (Tool #2025102090) (for reference, but DO NOT USE for torquing OCVs).
• Cam holding tool (Tool #2025200090) (required for torquing OCVs).
• A suitable pencil-sized non-metallic dowel or rod for testing the OCV button.
• Clean engine oil for lubrication during assembly.
• Replacement intake phaser (specific part number not listed in this TSB, refer to service information).

Important Warnings

This TSB highlights critical warnings for technicians to ensure proper repair and prevent damage:

• "DO NOT use the camshaft phaser holding tool (Tool #2025102090) while torquing the OCV after intake phaser replacement."
• "DO NOT lubricate the rear face of the phaser that contacts the camshaft."
• "ATTENTION: THE REPAIR PROCEDURE BELOW SHOULD REFLECT THE CURRENTLY PUBLISHED SERVICE PROCEDURE IN SERVICE LIBRARY. IF IT DOES NOT, PLEASE FOLLOW THE REPAIR PROCEDURE IN THIS DOCUMENT. PLEASE READ THE ENTIRE PROCEDURE BEFORE BEGINNING."
• "The service information in Service Library should be updated to reflect the changes mentioned above."

What Owners Should Do

If you hear an Engine Rattle Noise in your 2023-2025 Jeep Wrangler or other affected Stellantis vehicle, it is recommended to have your vehicle inspected by a qualified service technician. Reference TSB S2509000001 Rev. B to ensure the correct diagnostic and repair procedures are followed. This will help address the Jeep Wrangler engine rattle noise effectively and prevent potential long-term issues.