Need some help guys I’m lost. 2004 f250 6.0. Bout a year ago had the engine gont through gaskets studs etc....so a few days ago I had an injector go out on me. The copper washer failed. So I buy a new oem injector and install it’s get the truck fired up and after about 5 minutes of running I notice a leak out of my degas bottle from one the hoses. Hook up a pressure gauge and it’s building 16psi and venting out of the cap like I have headgasket failure. Mind you this wasn’t happening before the new injector. Well I shut the truck off and today I go outside and try to start it up and it’s hydrolocked. So I pull the injector back out and free it up and I’m waiting until tomorrow to put it back together. So my question would be has anyone else had this experience? My coolant isn’t contaminated with fuel and neither is my oil at least not that I can see or smell. Would something as simple as my injector not sealing correctly put that much pressure into my coolant system without any type of contamination? Any help would be greatly appreciated because I’m lost at this point!