30 Minute - Replacement of Alternator (and Battery) - JeepForum.com
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post #1 of 4 Old 07-31-2013, 11:39 AM Thread Starter
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2003 KJ Liberty 
Join Date: Jul 2013
Location: Plainfield
Posts: 1
30 Minute - Replacement of Alternator (and Battery)

I recently had to change the alternator and battery in our 2003 Liberty.

I have never changed an alternator. I am handy, but never liked doing much under the hood. However, on our 2003 Jeep Liberty, I found in incredibly easy. Including taking the time to watch the 4 minute YouTube video on the tension pulley, the entire replacement of alternator and battery took 32 minutes.

Here's the scoop.

Step 1: Watch YouTube video explaining loosening the serpentine belt tension pulley. This is only 4 minutes and does a nice quick explanation. This will speed up things if (like me) you have never removed a serpentine belt.

Step 2: Disconnect the battery. (Both cables) (Pic Below)

Step 3: Disconnect the cables going to the alternator.(Pic Below)

Step 4: Using the information in the video, loosen the tension pulley. (I found it easier to use a pipe like in the video.) You will need a 15mm socket for this.

Step 5: Slightly move the serpentine belt off of the alternator pulley. Be careful that you don’t let it fall out of place or you will have to refer to the diagram and put the belt back on all of the pulleys.

Step 6: Remove the three (3) bolts holding the alternator in place. The two front bolts will use the same 15mm socket and the third bolt (on top) will use a smaller one. (I believe a 13mm)

Step 7: Remove the alternator from the vehicle. I had to wrestle it a bit to free it, but then was able to remove it without any issues. (Pic Below)

(Reversing the steps above)

Step 8: Insert the new alternator and bolt it in place. (Pic Below)

Step 9: Replace the cables going to the alternator.(Pic Below)

Step 10: (Refer to video) Align the serpentine belt back in place (if fallen out) saving the alternator pulley for last, (easiest to attach). Move the tension pulley to loosen up the belt and slip the belt onto the last remaining pulley. (Pic Below)

You’re done with the alternator! Now for the battery.

Step 11: Loosen the retaining bolt and remove the old battery. Insert the new battery and tighten down the retaining bolt. (Pic Below)

Step 12: Attach the cables to the correct posts. (I know I should not have to go here, but... RED=(+)positive… and BLACK= (-)negative.) (Pic Below)

You’re Done.

Attached Thumbnails
Step 1.jpg   Step 2.jpg   Step 3.jpg   Step 7.jpg   Steps 8 9.jpg  

Step 10.jpg   Steps 11 12.jpg  

Last edited by S_Liberty_M; 07-31-2013 at 12:17 PM.
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post #2 of 4 Old 07-31-2013, 12:17 PM
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2002 KJ Liberty 
Join Date: Apr 2013
Location: Fargo
Posts: 437
Nice, quick, simple write up to explain to those who haven't done one. Nice explanation! I'm sure many will find it helpful. I think it also helps promote doing the job yourself to those who don't dare or don't think they can do it.
Jeepguy4276 is offline  
post #3 of 4 Old 07-31-2013, 06:21 PM
2005 TJ Wrangler 
Join Date: May 2006
Location: Grand Forks, ND
Posts: 3,006
Nice first post.

Thanks for posting your step by step.

05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015
95BadBoy is offline  
post #4 of 4 Old 08-01-2013, 02:47 PM
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1982 FSJ Cherokee 
Join Date: Sep 2012
Location: mesa
Posts: 1,255
Great write up. I have had occassion to go a little deeper and have had to remove the alternator twice now. yeah, it's pretty easy.

82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
olliehopnoodle is offline  

alternator , battery , liberty , serpentine belt , tensioner pulley

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