I am a previous CRD owner (back in 2010), and have found an '06 with 75k on it, so I'm thinking of taking the plunge again. It is at the Jeep dealership, but doesn't haven't any service records. Any pointers on specific questions I should ask or things I should look for? Thanks guys.

I would ask them about the timing belt first and foremost. Hopefully its been changed, if not it should be asap. Id also look for pressure under the radiator cap when cold, or discoloration in the coolant. Mine had evidence of Kseal or some other head gasket "fix" in it, shiny copper flakes floating around in the coolant. Check your upper and lower BJ for ripped boots, same with the boomerang in the back. Inspect the fuel filter to see if its the updated version. Glow plugs and updated relay for 5V.

Thats all I can think of for now

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05 CRD Sport - GDE EcoTune - Samcos - EGR Delete & Elbow kit - ARP Studs - Airtex E7181M

Leak on rear main seal at transmission-engine junction, leaking turbo oil return pipe, take the turbo intake hose off and wiggle turbo fan by hand to check movement.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

Where are you located?

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05 CRD Sport - GDE EcoTune - Samcos - EGR Delete & Elbow kit - ARP Studs - Airtex E7181M

are you sure to take another risk buying another KJ ?

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ECU Tuner -EGR OFF -DPF OFF Swirl/Flap OFF, Lambda OFF , DTC OFF in many cars , not ONLY

https://www.facebook.com/YetiChiptuning

I would read all the recent posts about blown engines and other constant problems: as well as the difficulty of getting parts. Make sure you want to go back down this road again. The more miles these vehicles have, the more problems they have.

After selling mine almost three years ago I am not even considering one of the new Dodge trucks with the eco-diesel. VM / Chrysler / FIAT have left a bad taste in my mouth and I will not own another VM engine, ever.

I happen to acquire a motor in very good condition at 91K miles since the car spent it's whole life in Texas. The rockers had no play when I replaced the rockers and ARP studs at 94K mile. No air-in-fuel issues for me either. I hope that my motor will survive as long as the diesel engine are supposed to! Keeping my finger crossed. I spent about $4000 to upgrade/fix everything that was bean counter engineering on this car so far.

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'06 Liberty CRD Limited. Bought at 91K miles.
ARP studs, New rockers, Stant inline tstat, Weeks 1&2, Provent, IDParts Silicone hoses,
2-1/2" Full OME lift, Timing belt, Water pump, TransGo kit, Plastic fan, Fumoto
2nd gen fuel head with 2nd stage 2 micron filter, in-tank lift pump, G2 Rear Diff Cover

look for previous mods and whether or not f37 sticker in engine compartment . Also note rpm on startup it could possibly already have a GDE tune and this is the way to check for it.

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05 Blu LIM, OME GDE Tbo, wk II 245/75/17, KC Lights, bull bar, 195K H TC
05 Blu Lim, Dayton, GDE HT, 255/75/18 , 210K , H TC
06 Bla Lim, GDE Eco, Destination AT 245/75/17, 151K, H TC
06 D Khaki Lim 126K wkII Eur TC
05 D khaki Lim 145k refurbishing
All CRDS: Fumoto, Lift , Fan Shroud mod, fuel head Gen II, SAMCOS,self TB, 2 Mic filt, Hayden

Turbo, rockers, engine tune and ARP's are essential if you want it to last.

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05 CRD: H.D.S2 stat,WW Ironrock trilink&LCA's, OX rear,ARB front, 4.10's, ARB bumper, Suncoast,OME 3.5, JBA UCA,rock rails, Moabs&265/75 Duratracs, GDE tunes ,FFD fan,ARP's, 2 micron fuel, new valves,sasquatch battery tray & grid heater, tensioner relocated
Mech fan, VH & AC delete