Dirt and water working down past the injectors means it is time for a new part. Replace it with the genuine Cummins 3909356 injector dust seal o-ring.

• Genuine Cummins: The factory part, so it matches the original fit and material.
• What it does: Seals the top of each injector bore against dirt and water.
• Fitment: 1994-1998 Dodge Ram trucks with the 5.9L 12V Cummins.
• Part number: Cummins 3909356.

Order today, and replace any related gaskets or hardware while you have it apart.