This sound is there no matter the engine temp. I live in southern California so ambient temps are mostly high.
It is mostly 3 ticks in a row as heard in the video but it varies.
I have checked the valve lash multiple times and everything has been very close to perfect. I haven't used diesel kleen in probably 4-5 months (i don't think i remember this sound being there when I was using it) so I will try some additives and see if it goes away. I am also going to re-torque the injector lines and the injectors themselves as I have not tried that either.
Doing some research on here and believe that it could be a valve seat, cp3 gear or injectors. There is no smoke on startup nor any excessive blow by. The sound does fade with throttle (i can't hear it around 1500 rpms). It can be heard in the cab with windows up or down. I can narrow it down to the drivers side of the motor but thats about it.
I hope this to cost me much, I have a 2600 mile trip at the end of April and need to get all these little issues worked out. The truck has just under 230k on it also.