Why You Should ALWAYS Key Your Duramax Camshaft!!

There are a lot of things that can go wrong inside an engine. Don't let a small dowl pin be the reason your engine has catastrophic failure

[LumenChaser]

Is it possible you never torqued down the main bolt on the cam shaft as 2500 miles is kinda scary lol. I just watched all the videos in order of the motor build then saw this, while I was watching the build (vid 2) you said you had to use the flywheel lock to then properly torque the front end bolts. You skipped right to installing the fan pulley and water pump ect. Amazing series I learned a lot about my truck and I appreciate the uploads!!