Cummins 5.9L Diesel Teardown Shows Why These Engines Are Hard To Kill

• This 5.9-liter Cummins turbo diesel was pulled from a 2006 Dodge Ram 2500.
• It was running poorly at 368,000 miles.
• Significant damage was found to the pistons.

Few engines attain legendary status like the Cummins B-Series diesel. It’s powered Dodge (and later, Ram) pickup trucks for decades, and the 5.9-liter inline-six featured in this recent I Do Cars video lived a hard life. It came from a 2006 Dodge Ram 2500 used by a roofer, and at 368,000 miles it wasn’t running very well. But it…