Originally Posted by scastlet
Is it normal for the 5.0 to make a slight knocking sound at idle?
Ahhh, welcome to the knocking club! Ford will have you believe it is normal. How do you feel after purchasing a brand new truck with an engine knock? I can tell you that Fords competitors engines are quiet. So, is this knock normal? I dumped mine with only 3,600 miles on it. It will get louder! Mine was so loud. Especially when it was warm outside. This engine will self destruct in short time. It cost me a few grand and much shopping, but I'm happy I did it. I feel bad for all that have this issue. It seems worse in the Mustang community. I will never buy a Ford again.