It may or may not be...But I had a ticking/pinging though it was a lifter at first, then thought it was the knock sensor cuz it seemed to only happen uner Acceleration...So...Anyway I am thinking it is not a huge issue cuz the car behaved fine otherwise...
Well it it took a turn for the worse and ended up being a pretty loud knock one day...I pulled the eng. and it turned ou to be a mainbearing...This was a POS ford reman eng. though...