Cummins N14 Oil in air system

Are you sure you don’t have a bad turbo sending oil to the compressor intake?

 

Well you said you’ve got the right dryer. Only other thing I can think is if, like @Heavyd said, you’ve got a restriction in the air intake or if it’s not getting enough water to keep it cool and it’s just overheating.

 

What kind of cartridge filter are you using? I’ve haven’t had good luck with any off brand. We only put on genuine Wabco. And there are 2 types but I don’t have the numbers with me, but I’ll try to get close. The one we put on has an oil layer, and I think it’s a ??350065?? (Could end in 68) There is a ??350035?? That doesn’t have the oil absorption layer.