here is my problem my crd has developed a loud chirping. i haven't really zeroed in on it yet BUT here's what i've come up with

first off i burnt the doo doo out of myself on the ac line on top of the radiator is this a clue to my ac failing because at idle theirs no chirping till i turn my ac on but at throttle it stops. when i use my stethoscope i cant 't really hear the chirping i'm lost hope someone else has had this unfortunate problem.

i have burnt myself on that a/c line that goes accross the top of the radiator today but no sorry chirping noise

_________________
05 CRD Limited, SEGR Kit, EHM, Selectrack Alpine DVD, 6000k HID headlights, Aux Lift Pump, 2.5" straight pipe, Diablo Extreme Puck, Euro converter
02 SLT Cummins H.O. 6spd manual with southbend 3850dd, fass 150hd, ddp 150hp injectors, arp studs, adrenaline stacked w smarty, traction bars, 6 inch stacks, level kit, bhaf

Most likely the tesnioner is failing.With the engine running and AC off watch the tensioner,then have someone turn on the AC while your watching the tensioner.If the tensioner starts jerking it's bad.Good time to replace the belt at the same time.

Actually it's probably not the tensioner. It's probably the alternator decoupler pulley. It's like a $55 part at moparpartsamerica.com.

_________________
05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

if your talking about the pulley under the alternator i just replaced that because thats what i thought was making the noise at first

The decoupler pulley, is the alternator pulley itself. It has inside a one-way overrunning friction clutch so that when the engine stops abruptly the inertia of the alternator spinning doesn't turn the pulley inside the belt and squeak.

If you see reddish dust on the front of the alternator decoupler pulley, it is a good signal that it is failing.

_________________
Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531

is this a common problem? it seems like i have read in a few different places on here about that pulley failing, are the new pulleys any better? is there anything we can do to prolong the life of the pulley, just curious, mine has some red dust on the front of the pulley right now i just checked but no chirp yet.

_________________
05 CRD Limited, SEGR Kit, EHM, Selectrack Alpine DVD, 6000k HID headlights, Aux Lift Pump, 2.5" straight pipe, Diablo Extreme Puck, Euro converter
02 SLT Cummins H.O. 6spd manual with southbend 3850dd, fass 150hd, ddp 150hp injectors, arp studs, adrenaline stacked w smarty, traction bars, 6 inch stacks, level kit, bhaf

My bet it is the tensioner and this is what you can do.
1.) Start it and let it go to a normal idle speed.
2.) Turn on AC, listen for chirp, turn off AC, listen for chirp to dissipate
3.) Turn on lights and other electrical drags, listen for chirp (but it will be less), turn off lights and stuff and see if sound dissipates.
4.) Now turn on everything, including the AC, it should sound like it is falling apart with belt drag coming from both the alternator and the compressor.
5.) Resume normal operation with everything off, it should be much quieter.
6.) You have likely discovered it is time to do a routine maintenance on your tensioner, idler pulleys and serpentine belt.

My $.02
Good luck,
Boilermaker2

_________________
2005 CRD Sport - "Blackie"
Tow Package
Trac Loc
GDE EcoTune w/ unl torque
Goodyear Wrangler SilentArmor Tires
over 192,000+ miles
100k mile service performed
5V Glow Plugs Installed and ECM updated