Ill give you a brief account of what happened and you tell me what you think. 6 months ago, my truck went into Ford and had the #5 & #7 injectors replaced. 5 weeks ago, my truck began leaking coolant. Bring the truck into Ford, they find diesel in the coolant and tell me i have a cracked head/heads. Heads go to machine shop, and they pressure test and magnaflux them twice and cant find a crack. Then im told ford contacted an engineer who said it would have to be the fuel injector cups. I find out today from the diesel tech that when he pulled the heads, he found coolant on top of the #5 injector cup which leads him to believe the #5 cup is what the problem is. Just prior to replacing the 2 injectors 6 month ago, I did a coolant flush with restore and restore + and about 180 gallons of distilled water. I flushed it "by the book" and it took every bit of 12hrs, and replaced it with CAT 1 ELC concentrate. The diesel tech then says, "the engineer at ford said what most likely cause the #5 cup to leak was the red coolant you put in it!" IM CALLING B.S. Somebody please chime in and tell me what you think. Should I be responsible for this bill????