2021-2025 Jeep/RAM/Dodge Engine Rattle Noise TSB

Symptoms

Owners of 2021-2025 Jeep, RAM, and Dodge vehicles, including those experiencing a Jeep Wrangler engine rattle noise, may report a distinct rattling sound emanating from the engine compartment. This noise is often described as a general "rattling noise coming from the engine."

Diagnosis and Trigger Conditions

If you're experiencing a Jeep Wrangler engine rattle noise, technicians are advised to follow a specific diagnostic sequence to determine if the issue is phaser-related. First, ensure the engine reaches its normal operating temperature, between 194°F and 230°F. Once the engine is warm, turn it off.

Restart the engine and wait approximately 30 seconds; the rattling noise should be present. Next, step on the gas pedal until the noise disappears, then release it, allowing the noise to return. Repeating this process three times can confirm if the noise is indeed phaser-related. A stethoscope can then be used to pinpoint the exact bank from which the noise originates, with the right bank being a common source.

Important Warnings for Technicians

Stellantis TSB S2509000001 Rev. A highlights critical instructions for technicians during repair to prevent further issues:

• "DO NOT use the camshaft phaser holding tool (Tool #2025102090) while torquing the OCVs." This specific tool is explicitly prohibited for this step.
• "DO NOT lubricate the rear face of the phaser that contacts the camshaft." Lubrication should only be applied to the front face of the phaser that contacts the Oil Control Valve (OCV).

Repair Procedure Summary

Once the engine rattle is confirmed to be phaser-related and the affected bank is identified, the suspect phaser should be replaced. This TSB provides a modification to the existing service procedure found in the Service Library. Key modifications include specific instructions for tool usage and lubrication during the repair.

During the process of torquing the OCVs, technicians must use the cam holding tool (Tool #2025200090). It is crucial to avoid using the camshaft phaser holding tool (Tool #2025102090) for this step. Additionally, after installing the intake phaser onto the camshaft, the front face of the phaser that interfaces with the OCV must be lubricated with clean engine oil. However, the rear face of the phaser, which contacts the camshaft, must not be lubricated.

Required Tools or Parts

Technicians will need the following specialized tools for this repair:

• Camshaft Phaser Holding Tool: Tool #2025102090 (Note: This tool is specifically not to be used for torquing OCVs).
• Cam Holding Tool: Tool #2025200090 (This tool is to be used for torquing OCVs).

Owner Action

If your 2021-2025 Jeep, RAM, or Dodge vehicle is exhibiting an engine rattle noise, especially one that matches the diagnostic description, it is recommended to schedule an appointment with an authorized dealership. Inform them about the persistent rattling noise. The dealership technicians can perform the diagnostic steps outlined in Stellantis TSB S2509000001 Rev. A to confirm if a camshaft phaser replacement is necessary and apply the updated repair procedure.

NHTSA ID: 11016107