Does anybody have pics of this? I cant find any. I've been trying to figure out what it is or where it is, and what is it's purpose. Thanks

It's the only pulley attached to the alternator. Inside the pulley is a decoupler mechanism.

_________________
SmokyCA
---------------
2006 CRD, GDE Ecotune

Really? You don't say.

The reason I asked is because I don't think mine has one. Mines just for a regular pulley like every alt. should have. I just wanted a pic to verify.

The is a decouple pulley with a built in clutch set the clutch is what goes bad in these just make sure you get the right part number and here is a pick my old one has the white build up. And if your old one looks like the one on the right i will sell you one for 50 plus shipping.

_________________
My CRD Build Thread
Soon to Come:more lights

Here's what mine has.... I just now walked out, popped the hood and took this pic.

Some one has replaced yours with a hard mounted pulley not the decoupler I remember people talking about this on the forums but can't remember the issues it caused. I know with that set up the alternator runs constantly instead of just when it needs to.

_________________
My CRD Build Thread
Soon to Come:more lights

It is not just that it runs all the time, it is constantly coupled to the serpentine belt, which means that the torque pulses from the 4 cylinder motor are transmitted to the belt, the tensioner, the idlers, and the alternator, etc. causing premature failure of all these components.

_________________
Grid power- the one true essential

2005 Liberty CRD- ARP studs, Fumoto, Hayden FC, inline Tstat, ETechno 7v GP, Platinum P1, in-tank lift pump.
1983 Volvo D24T
1981 Volvo D24
Dodge Cummins TD
Case 580B
Mitsubishi MT180 diesel
Kubota BX25 diesel

So I assume I would put one on and lose the pulley that's on it now.

_________________
05 Liberty CRD DD/ski slut
Lifted,hottune,Full exhaust
05 Mitsubish evolution SSL
450awhp/400awtq autocross slut

Isn't it there to allow the alternator to 'coast' to a stop instead of stop almost instantly when you shut off the engine? Diesels come to a near dead stop when you cut off the flow of fuel. Gasoline engines slow down and then stop. Hard, fast stops are hard on spinning things like alternators...at least that's the explanation I remember reading somewhere!

_________________
2005 Liberty Sport CRD
Cleaned MAP sensor, ORM, ELM327 Bluetooth OBDII reader with Torque Pro, USA Spec PA-11CHR iPod adapter (used Aux input for Pandora!)
Awaiting install: EVIC, air cleaner hose, and Saikou Michi Catch Can (like a Provent)

Did you hear about the guy who was hooked on brake fluid?
He swears he can stop any time.

http://www.youtube.com/watch?v=MTGD8MZf-oM
This gives a better understanding of how each pully works.

_________________
05 Liberty CRD DD/ski slut
Lifted,hottune,Full exhaust
05 Mitsubish evolution SSL
450awhp/400awtq autocross slut

Good videos. Thanks, looks like I need to put one on mine instead of the solid pulley it has on it now.

How long is the stud for the alt. With the decoupler pulleys? I'm wondering if mines to short? Looking at the pic of mine it doesnt appear to be long enough to get a nut on the stud with the pulley on it? Is the pulley recessed for the nut like on my solid pulley?

On the stock alternator there is no nut. The pulley threads right on and the belt is always turning it in the tightening direction.

_________________
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,
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.

Ah, ok, that makes sense. I was wondering. Thanks