Holey DPF!

[Chamberpains]

Just like the ISX, pull your turbo exhaust pipe off measure the outlet and shove a plug in there to seal it off pull the intake side off shove a plug in there. Then find an opening to pump air into up to. Usually the turbo outlet temp sensor or maybe you can pull the boost sensor out it's different on all engines and manufacturers. But there's usually a plug somewhere that you can access. then start filling a system with hair off a pressure regulator up to your desired PSI. Usually 20 to 30 works to expose all leaks on the intake piping and exhaust.

Its posted on here how to pressurize the whole engine. With links to what plugs or at least what type of plugs to use.