2021-2025 Jeep/Ram Engine Rattle Noise TSB S2509000001

Stellantis has issued Manufacturer Communication S2509000001, a STAR Online Publication, to address customer complaints regarding an engine rattle noise in various 2021-2025 Jeep, Dodge, and Ram vehicles. This technical service bulletin (TSB) provides technicians with a specific diagnostic procedure to identify phaser-related noise and outlines crucial modifications to existing repair procedures for camshaft phaser replacement.

The document, released in February 2025, serves as a guide for technicians to accurately diagnose and repair the Jeep Ram engine rattle noise, ensuring proper tool usage and lubrication during the repair process.

Symptoms of Engine Rattle Noise

Owners may notice a distinct rattling noise coming from the engine. This Jeep Ram engine rattle noise typically presents under specific conditions:

• The noise is usually present approximately 30 seconds after starting the engine, once it has reached its normal operating temperature (194°F-230°F).
• When the gas pedal is pressed, the noise temporarily disappears. Upon releasing the gas pedal, the rattle noise returns. This behavior, if repeatable three times, strongly suggests a phaser-related issue.

Diagnosing the Engine Rattle

Technicians are instructed to follow a precise diagnostic sequence to confirm the source of the engine rattle noise:

1. Ensure the engine reaches its normal operating temperature (194°F-230°F) before proceeding.
2. Turn the engine off, then restart it.
3. After 30 seconds, listen for the rattle noise. If present, perform the gas pedal test: press the pedal until the noise goes away, then release it to hear the noise return. Repeat this three times.
4. If the noise behaves as described, it is likely phaser-related. A stethoscope should then be used to pinpoint the exact bank from which the noise originates. The document notes a high probability that the noise will come from the right bank.

Crucial Repair Procedure Modifications

Manufacturer Communication S2509000001 emphasizes that the repair procedure for replacing a suspect phaser is a modification to currently issued service procedures. Technicians must adhere to these updated instructions to avoid improper repairs.

Incorrect Tool Usage Warning

It is critical that technicians DO NOT USE the camshaft phaser holding tool with part number Tool #2025102090 when torquing the Oil Control Valves (OCVs). Using this specific tool for this step is incorrect and could lead to issues.

Correct Tool Usage

Conversely, technicians DO USE the cam holding tool with part number Tool #2025200090 when torquing the OCVs. This tool is specifically designed for the task and ensures proper assembly.

Critical Lubrication Instructions

Proper lubrication is essential during the installation of the intake phaser. Technicians must:

• DO ADD OIL HERE: Lubricate the front face of the phaser that makes contact with the OCV using clean engine oil after the intake phaser has been placed on the camshaft.
• DO NOT ADD OIL HERE: Crucially, technicians must NOT lubricate the rear face of the phaser, which contacts the camshaft. Lubricating this surface is incorrect and should be avoided.

Required Tools for Service

This bulletin specifically references two tools for camshaft phaser service:

• Tool #2025102090: Camshaft phaser holding tool (explicitly DO NOT USE for torquing OCVs).
• Tool #2025200090: Cam holding tool (explicitly DO USE for torquing OCVs).

What Owners Should Know

This manufacturer communication is intended for service technicians and provides guidance on diagnosing and repairing the Jeep Ram engine rattle noise. It's important to note that this document does not authorize warranty repairs and serves as a record of past experiences rather than a definitive conclusion about vehicle issues. Technicians are considered the experts responsible for appropriate action.

If you are experiencing an engine rattle noise in your 2021-2025 Jeep, Dodge, or Ram vehicle, it is recommended to contact your authorized dealership. They have access to the latest technical information, including this TSB S2509000001, and the specialized tools required to properly diagnose and address phaser-related issues.

NHTSA ID: 11014408