We have a 2010 4 cylinder terrain purchased new July of last year, it has 15k miles on it and has sounded like this since i can remember. Some people mistaken it as a diesel. Other than the sound it seams perfectly fine. I brought it to the dealer to have it checked out and they agreed it sounded loud, and we listened to their service terrain and i could hear the sound, just not as loud. Wondering if this is anything to be concerned about? I use Mobil 1 synthetic 5w-30, i was a quart low and they accused me of bad maintenance as they were setting up for a trial. I told them i change according to what the manual says by going by the meter, and they said thats not the proper way to do it and its my fault if anything happens. They are the worst dealer i have ever dealt with (sorry to go off on a little rant).
anyway, here is the video, the video definitely amplifies the sound, doesnt sound this loud in person, but you should get the idea.

anyway, here is the video, the video definitely amplifies the sound, doesnt sound this loud in person, but you should get the idea.
