I have a 08 F-250 with about 123,000 on it. I got a ticking noise is coming from the driver side of the truck, closer to the firewall and it's coming from underneath the truck. It doesn't do it when i first start the truck and it's cold. It comes after I drive the truck around and comes when I'm at a idle, then goes away after i start driving it. Even at a idle it comes and goes and it not consistant. Me and my buddies checked to see if it may be coming from the head and it's not. I sent my oil to catepillar and it came back clean, normal wear. We hooked up the scanner and all the parameters are good, and it runs great. Just wanna know what this is, so I don't have to stress about it. Is this the normal ticking that people talk about on the 6.4's?