The guy I work with has a 2011 Hyundai Elantra....He said every once in a while when he starts the cars he gets a quick "grinding" noise from the timing chain area. A mechanic confirmed this and told him to take it to Hyundai. He bought the car used and has 80,000 miles on it---Hyundai said it needs a new engine and it's not covered. However, there's no check engine light, does not burn oil and drives completely normal other than this quick noise at random start ups. I told him this doesn't sound right and should call Hyundai corporate. I think he's getting scammed----Also, the mechanic said everything sounded and looked good visually.