a week ago my son was towing a 30 foot trailer on a 300 mile trip everything was fine untill he was about 40 miles from home the engine lost power began to make a lot of noise he shut it off it looks like the valves have backed off he has it at his shop now he also saw that there was oil leaking by the turbo and exaust manifold the engine was rebuilt only 2 years ago should we redo the valves first or pull the head to see what is going on thanks also thanks for the birthday message domy

 

i would do another valve adjustment first, then test drive it.
as for the oil leak, we would need a little more info as to where it's coming from.