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Unread 06-29-2008, 06:31 PM   #1
sandman
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1993 ZJ 
 
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idler pulley is shot. (edit) pics added

ok, im not sure if its even called an idler pulley but on the 4.0 its the pulley by the alternator. is that what i call it? well anyways, i went up to the mountains yesterday to camp and fish, it was kind of squeaking on the way up but today on the way home it was making all sorts of racket. so i just crossed my fingers and hoped i would get home. a block from my friends house it made a good pop and then the belt started squealing, i limped to his house and parked it. its gonna be an easy fix. but heres my question, have any of you guys ever had to replace it? and if so did it go out real quick like mine did? and what do you call it, an idler pulley?

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Last edited by sandman; 06-30-2008 at 03:49 PM..
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Unread 06-29-2008, 06:42 PM   #2
BLACKzj52
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yeah its called and idler pulley.
i thought mine was going out once cuz my belt was squeaking (then i thought it was the ps pump and pulley, just turned out to be the belt
so i replaced it but the squeaking didnt stop.. i basically wasted $35 lol
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Unread 06-29-2008, 08:48 PM   #3
elmer_fud
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mine didn't completly go out, but it was squeaking. I called it an ideler pulley, and the places knew what i was talking about, but it took 4 differn't palces to find it.
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Or just tie a 12 lb fish to a one foot pipe.
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Unread 06-29-2008, 09:15 PM   #4
JCZJ
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I've had to replace mine...the bearing basically self destructed and I had to drive ~10 miles to get home, it just made a horrible sound.

As for the replacement, the bolt is really hard to get to...and I'd suggest taking off the fan guard/shroud (says caution fan on it). It's even harder to get to from the back...just takes some elbow grease and some patience.
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Unread 06-30-2008, 04:53 AM   #5
Turbonut
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Originally Posted by sandman View Post
and if so did it go out real quick like mine did? and what do you call it, an idler pulley?
Chances are it's been making a slight sound at various times for quite a while, e.g. on cold start. When the sound is first heard, it's a warning, buy a new pulley(s) to avoid a major problem down the road.

Last edited by Turbonut; 06-30-2008 at 06:55 PM..
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Unread 06-30-2008, 04:03 PM   #6
sandman
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well it was easy, did it in my friends apartment parking lot.
messed up pulley.

tools used, and whats left of the bearing=nothing.

slight bit of damage to mounting post

bearing spacer old one on the bottom had the inner race stuck to it. new one is quite a bit smaller but it works.

and done
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Unread 06-30-2008, 05:56 PM   #7
jeepheller98
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i bought a new idler puller but it got all full of dirt and stuff from wheeling right away and was making noise, and i didnt want to replace it because it was new. so i took it apart cleaned it with some parts cleaner and pushed some bearing grease in it and it hasnt made noise in 6 months
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Unread 06-30-2008, 06:09 PM   #8
sandman
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thats funny i did that to this one when i did my water pump around 8 months ago. this is why i think it failed.
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Unread 07-12-2008, 03:18 PM   #9
lma1973
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I just followed this procedure and everything went great until i started her up and within 10 seconds, the belt has slipped off and the new idler pulley is bent and shot already. UGH!!!
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Unread 07-16-2009, 10:52 PM   #10
g2mike
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mine just went today. when i pulled over and popped the hood it was shooting sparks! haha
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Unread 07-17-2009, 12:18 AM   #11
StellaTheZJ
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You don't need to buy a pulley to fix these. The idlers use a very common bearing, which can be pressed out and in easily. Look on the bearing seal and you'll see the bearing is marked with a number . I think it's #6203? This bearing is used in many vehicles (like Mistubishi V6 idlers, GM V6 idler, etc) so it should be available at your parts store, and probably cheaper than a pulley and bearing assembly! I've just done this on 2 ZJs and an XJ.
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Unread 07-17-2009, 01:34 PM   #12
elmer_fud
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yeah but for $15 or whatever the pulley costs (somewhere near that) and not having a press it is easier to just get a new assembly
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Quote:
Originally Posted by Speedycat View Post
I am not one to be changing lanes at 70 mph on a lifted truck on 33's, but since I am in Miami, I have to be prepared for the continuous influx of new drivers whose previous ride was a bicycle with wooden wheels.
Quote:
Originally Posted by FPKites View Post
badger, badger, badger, badger, badger, badger, badger, badger, badger, badger, badger, Mushroom!!! :D
Quote:
Originally Posted by ZeeJay1997 View Post
Or just tie a 12 lb fish to a one foot pipe.
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Unread 07-17-2009, 02:35 PM   #13
BLACKzj52
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Quote:
Originally Posted by elmer_fud View Post
yeah but for $15 or whatever the pulley costs (somewhere near that) and not having a press it is easier to just get a new assembly
mine was 35...
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Unread 07-17-2009, 11:01 PM   #14
StellaTheZJ
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The bearing can be changed with a vice and two sockets (or pieces of pipe, or???), although a press makes it easier.
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Unread 07-18-2009, 10:15 AM   #15
dcvance87
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My idler pulley went out a couple weeks ago, yesterday my belt tensioner pulley went out, gotta put the new one on today.
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