When I start the truck it`s quiet,it idles good. After it warms up it makes a rattling noise. It sounds like the vacuum pump,I was told it was the pump. I replaced the pump and after it warmed up it is making the noise again. It isn`t as loud as it was before I replaced it but the sound is back.What else could it be? It`s the 6.5 turbo diesel
Oct 24, 2009 at 3:54 PM