I had a ticking in my old 2.8, probably in the middle or towards the left side a tad, but it was kinda hard to tell. But anyways it would start doing it when it warmed up then would do it until it cooled down...and it was really noticeable when you accel. then left off, you could hear it tick pretty loud. Well i found out that my bottom end went piston ring) on my 2.8 at 180,000 miles.(Got a brand new modified 2.8 bored out to a 3.1 since then!!) So thats something to keep in mind if your symptoms were anything like mine! Worst case thought, hope it doesn't apply to you! just thought i'd let you know!