I am having a chain slop sound coming from the head. Is the chain stretching problem common on the 4B12 as well? I only noticed it when I went to jump a car and I have no codes yet.
Lancer GTS 4B12 - 2011 with 36k miles

 

Bump. Took it to the dealership and they said it was normal. I am going to school for aerospace engineer. This definitely isn't a normal sound. The dealership said its a valve that regulates the pressure from the crank case to the head. Anyone know of a good dealership that's in Colorado that can help me and actually fix this problem?