2009 maxxforce dt466 no start

well i got the truck to run and now the engine is locked up i did this all in one day .i shot a couple shots of ether to get it to start back up but now its locked up i can turn it over at the flywheel it will turn and then it will lock back up in one spot i can turn the flywheel back the other way and it get to that certain spot and it will lock up my guess is i done bent a valve or worse gona pull the valve cover and remove the injectors and pray it will be just hydro locked up from to much fuel in the locked cylinder

 

well it didnt take me long to find what had happen to the engine pulled the valve cover and the number one cylinder valve rocker arms have slipped out of there grooves one of the rockers had slipped all the way out and one of them was locked between the valves and were stuck together locking the engine.. . when i first got it started yesterday it had a loud ticking noise i could hear i just thought it was one of the rocker arm was loose .. so i dont think the ether had anything to do with it locking up the engine it was the loose rocker arms and valve rockers well any way i still dont know what caused the rocker arms to fail this truck only has 80k miles on it

 

the bridges were still there the but one of them was laying out by the rocker arm and was not touching the valve at all . the front rocker arm pushrod is bent and one of the valves the valve spring locks came out and were laying to the side of the valve and one valve is bent it is stuck half way down and hitting the piston its the number one piston very front one the others look good but i do have one big mess

 

the head does have to come off and i wont know until i get it off and check the lifters and cam because i dont know why the rocker arms came loose to start with. i am gona have to find someone else to pull the head i done as much as i could do by my self for now thanks