3406b running rough

3406b 4mg.
I have done some searching and keep coming up with a bunch of different things. Posting here to explain most of my situation best I can.

Issues started by getting some coolant into top end, never was in oil pan. Also truck had a slight miss when going down highway could hear it in exhaust. The truck would hydrolock in a cylinder when you shut it off and restart and with that would blow out a lot of white smoke or coolant related not fuel, until 5-10 minutes it would clear up back to normal. With all that and few other small things being the issue I tore into truck and had a crack in head between I take and exhaust valves in cylinder #5 as of today got truck put back together with reman cat head,reman cat nozzles, dual oil cooler piston jets, new gaskets and seals. Had a mechanic help me put everything back together, torqued and adjusted properly. Fired it up and it has now a very rough idle and engine running rough through all rpms, low power, and a steady haze of white smoke constant while idleing and running down road, did not do that before. Cracked injector lines and all 6 seem to be squirting out the same but when cracking #1 and #6 there is no change in engine and the way it runs the rest all make it miss more and die down a bit. Checked return line back to tank and is flowing not sure how much should be flowing back but that as far as I have takin it so far. I don't understand how it can run worse after the work then it did before it was tore apart. Any help is appreciated, hopefully it makes some sense of what I have done, a lot to try and explain
Thanks

 

Also to add mechanic looked at 1 rod bearing said it looked good along with the liners and pistons so did not touch any of that. He helped Install everything torque and set valve and jake clearances

 

Are cat reman injectors common to have bad ones?

 

I was going to get my originals bench tested but they wanted $40 a piece to test when I could buy remans for about $100. Looked into new but none were anywhere close so went with remans, maybe I should take them back out and get them tested.

 

Havnt messed with it today but going to try that this afternoon or Tommorow and see if problem switches to other holes or not if not then I guess pump issues

 

well I took valve covers off and looked at everything before pulling injectors and swapping them around. I found the on #6 the rocker arm was vertical push rod was just laying against valve cover spacer and the valve bridge I think it's called was off the 2 valves sideway. The nut on rocker arm adjustment is missing