Read and study this forum, it will guide you as to how to make your CRD motor survive.
First and foremost, replace the camshaft belt and water pump every 100k.
Get that oil out of the turbo intake, EHM mod, Provent mod, or other; just get it out!
Disable the EGR puking filth into the intake; block, cap, remove, reprogram OBC; by whatever means possible.
Get a Weeks elbow kit and get rid of the FCV, all EGR plumbing, extra water lines, etc...
Most important:
Re-flash the OBC to change how the engine management software controls everything with all the EM crap removed; get a GDE, Yeti, or SEGR modification to make it perform efficiently without all the choking and engine killing junk in service.
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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve