In the world of heavy-duty pickups, competition under the hood is fierce, with major brands like Duramax, Cummins, and Powerstroke, making the list of the most reliable diesel engines ever built.

For the record, this isn't the worst damage we've seen from an I Do Cars engine teardown video. It's not even the worst 3.0-liter Duramax we've ... But we've never seen a hole in the cylinder ...

Strength was never really an issue for previous Duramax engines, but as horsepower and torque figures continued to climb, GM fortified the LBZ to better handle extreme forces. The engine block was ...