I noticed a screeching sound after timing belt, ARP stud, week kit, CAC hoses, etc. install was completed. The screeching was noticeable during acceleration and/or going uphill with cruise control on. I thought it must be belt or turbo going out. I even ordered new serpentine belt tensioner and idlers. The turbo shaft had no play.

It turned out to be a vibration noise. The intake CAC hose was rubbing against air box electrical connector. The vibration even made a little slit on the CAC hose. I caught that in time before it punctured my CAC hose. Lesson learned: Make sure nothing is rubbing against anything connected to motor.

Having said that, looks like my motor mount might be going out. I get noticeable side to side vibration on motor at idle. I will try to post the video.

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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