Does your DD15 sound like this in the morning? You may want to look at your valve adjustment.
18:06
Mechanic told customer it was a bad injector. Know what to look for. Before you spend your money.
18:25
Freightliner Cascadia DD13 DD15 DD16 valve adjustment over the head tune up lash adjustment
10:40
DD15 valve adjustment interval, how often should you adjust your valves?
19:34
Who Approved This and Why Is It Still Being Made? Wet Belt aka Belt in Oil Engines
15:03
Valve adjustment on a DD15 Detroit
12:52
Worst Engines: GM's 8.2L / 500ci "Fuel Pincher" Detroit Diesel Pinched Its Owners' Pocketbooks
19:19
Can we bring this DD15 back from zero compression? This is why valve adjustments are important.
10:20