3406B coolant in oil (oil analysis), fuel in coolant

So I have a quandry with my 3406B. I'm doing yearly maintenance and sent in an oil sample just mostly to see how my oil is holding up to extended changes. I've been losing coolant but it'd been leaking out the upper radiator tank gasket for a few months till I could get some maintenance time. The oil analysis showed evidence of coolant in oil but there was none visible from the pan. Also elevated copper (950ppm) but normal tin , lead, etc.. I decided to put a new water pump on it and a new oil cooler as well as the ends of the tubes looked kind of gooy. I pulled the valve covers and found a little bit of coolant drops here and there and around one valve spring base. After the drained coolant sat for a week, I pulled the lid off the final drain bucket and found what looks and smells like fuel on the top. I pulled the injectors and injector adapters and I cannot form the life of me understand how fuel could be getting into the coolant with this set-up. No visibly cracked adapters.? What am I missing? ( I don't have a fuel fired heater on the sytem) Please weigh in if you have any good thoughts on this. Thanks

 

well, my wife thinks that I mistakenly put the coolant into a bucket with a bit of fuel in it as well. I thought I checked it first, but I'm certainly not above mistakes. I hope that's case. I just wanted to get an opinion from some experts on the matter to help give me some clarity. I couldn't see a reasonable path for the fuel to reach the coolant. I guess I'll finish up the reseal of the adapters and injectors run it like you say, see how it goes. One of the adapters came out real hard. It had a gauled thread at the end. Hope the threads in the head didn't get too tweaked for the new one to thread in properly. Does anyone know how much to tighten the new bleed screw on the injectors? The seal kits for injectors came with new springs. Should I open them up and put in the new springs or just outside seals and let them be? It has a water separator filter but no coolant lines to it. Thanks For the advice!