help did my truck get fixed wrong
 

So I had a 2006 f250 king ranch 6.0 diesel with a bad head gasket. I took it in to the local diesel shop that specializes in these trucks...... So I ended up dropping 9k on a low miles block that they built up with arp studs, gaskets, new oil cooler, turbo, updated valves, ect. All under 90 day warrenty.i left with the truck and noticed the heater not working and a bit of white smoke on cold start.i called they checked it out told me that heater core was plugged probably from rust in my block from wrecking yard motor. I was concerned but they told me not to worry just drive it and they will get it donenin aweek. They also informed me that injectors 1 and 6 were under par at 1115 rpm only. So the first trip I make downthe freeway the truck dies, no noise just died and no start. Towed it back to the shop they tell me injectors 1 and 4 blew causing hydrolock. But they said the new oil cooler failed to and they would replace that under warranty.also there is coolant in my oil and oil in my coolant. My understanding is oilmcooler failure will cause injector failure so shouldnt my injector damage be covered also.So my question is two things.
1. Did my injectors fail due to the oil cooler failing and should they be covered under warranty
2. What other damage may have been done due to oil cooler failure .

they want me to pay for new injectors and a flush and keep my fingers crossed theres not more damage.they said they would replace they cooler and heater core on them. Am I getting screwed here.

Wondering if shop helped you out, most reputable shops will. Nobody can tell you what's in your agreement but if it was my shop I would bend over backwards to keep a good reputation! Just me . .

Wow no lube when they installed that motor. Nice of them.