Crankcase pressure

[Lonestar10]

i might also look into valve stem seals letting air by and into crankcase if its not making alot of blowby at idle to account for the pressure causing the oil leaks. theres Rings, Air Compressor, valve stem seals, head gasket blown only to an oil passage, turbo seals thats the only places i can think of that can allow pressure into the system without introducing incorrect fluids, i believe CATs use a similiar cam driven fuel injector to cummins 870/871 on some of their engines just have a big bulky center with i believe electrical connections if they are HUEY injectors like what was used in powerstroke 7.3l/6.0/i beleive its a 446 international engine and a few others then i could see compression getting into the oil through the injector but with cam driven style i dont beleive any oil passages are near the injector unless its blowing past all the seals on the injector into the head space.