I just found out my timing chain is super stretched and causing the timing to jump. This has been a problem since I first took delivery of it. Anyone have an idea what would cause this? Im still running the stock cam tensioner. My car has about 300 miles on it and has been consistently in the shop trying to figure out why. Now my dealer says they need to pull the motor to replace the chain. According to my dealer (who is excellent ) this is the first they have ever seen something like this. Any thoughts?