Hi guys, There's a noticeable tick-tick-tick sound coming from the 3600 engine, but the sound is only apparent at higher speeds, not at idle. I'm not sure if this is a case of noisy lifters or the fact that the exhaust pipe is missing and the muffler has a hole in it. Here's a video of the truck running. Notice at around 1:33 when the truck is going down that hill, you can hear a tick tick tick ticking.
IF this is valve noise, is it safe to drive the truck in this condition/it's just more of an obnoxious sound or can damage be done the more the truck runs?
