Originally posted by stevebfl
After fixin hundreds of failures, it is my conclusion that proper maintenance would be to replace the upper rails every 4-5 years or 50-75k. Do what you want with the chain and tentioner.
Does this apply to the M119 engine?
I wasn't planning on touching the timing chain or anything having to do with it on my car. If I can do this repair and it is easy and cheap then I will do it.