Running out of projects on the car, I finally decided to pull the timing chain guide.

It should've had priority over 95% of the mods I've done. If it ever broke, I had no one but myself to blame. The inside of the vavle cover was evidently worn.

It's cracked, as deep as 3mm at two points (I tried attaching the file but no luck):
http://www.imagestation.com/picture/...7/f8e04247.jpg