Broken camshaft!

[A17Z]

So I finally figured out why I'm running on only 2 cylinders. The exhaust camshaft split in two near one of the middle journals. How the heck did this happen? I'm planning to just replace the cam but is the a symptom of a bigger problem? Or was this just a fluke?

[contranication]

If it split, you should check your journal tolerances before installing a new one