Description 2003 – 2004 5.9L Dodge Cummins Turbocharger Oil Return Line Dorman # 904-346 Oil Return/Drain Lines can accumulate debris over time, if bad enough, it can cause restrictions in the lines and result in the turbo overheating. It is highly recommended to change the Oil Feed and Return lines when replacing the turbocharger to ensure you are getting the cleanest possible oil and the volume required to lubricate and cool the turbocharger
