How to replace your idler pulley bearings. - JeepForum.com
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Unread 12-12-2004, 05:54 PM   #1
Ishodu
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How to replace your idler pulley bearings.

I did this on my 87 Comanche. Not sure if all jeeps would use the same bearings or not. I should have took pics when I did the job. But I hope this helps.

Procedure as requested.

What your going to need:
2 6203-2RS/C3 bearings
Access to a press
Piece of round rod 3/4" or so will work fine
A piece of pipe about 3-4" long and with an opening large enough that the bearings will fit inside.

Remove the pulleys first then on the press place the pipe on the bed. Place the pulley on the pipe so that its lined up so the bearing will fall in the pipe when pushed. Then put the rod in the middle of the bearing and push it will the press it will fall through.
To install take the new bearing and place it slightly in the hole. Take the old bearing and place it on top (centered). Now use the rod to push against the old bearing to push the new one in. Stop pressing it in when the bearing is in position. And your done.


Now I know another method that will work well an alternative to using a press.

You need:
2 6203-2RS/C3 bearings
Piece of pipe slightly larger than the bearings.
Hammer
Oven and a freezer.
Thick gloves

Remove the pulleys. Place the pipe on a sturdy surface and the pulley on top so that the bearings will fall inside the pipe. Pound them out with a hammer. Now take the bearings and place them in the freezer for about 1 hour. And at this time put the pulleys in the oven. (metal ones only) Heat the pulleys to about 250F. Now all you have to do is slip the new cold bearings in the hot pulleys use the gloves of course. You will have to be fast they will lock together quite fast. And your done.

Never hammer new bearings this will ruin them.

Also common sense is to check to make sure you have the right bearings by comparing them or looking at the #s.
You can also use bearing # 6203-2Z/C3 the difference is the seals. The 2RS are rubber seals. The 2Z is steel Shields. Both will work but the rubber seals are better.

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Unread 12-12-2004, 08:51 PM   #2
halfmt1
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thanks for the info. might come in handy later.

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Unread 12-13-2004, 09:01 AM   #3
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you could have just replaced the hole thing. Not sure how much mine cost put it was not very much.
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Unread 12-13-2004, 09:53 AM   #4
ctavel
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A new idler pulley costs les than 20 bucks, so unless the bearing replacement was super cheap I suggest you just buy a new one....

Just my opinion
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Unread 12-13-2004, 09:59 AM   #5
LJ_Cool
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you may be right about the cost.

But I think the point is that you can fix it your self, and here's how,

Likewise, one can fix the rusty dakota gas cap problem by disassembling and cleaning and painting the internal spring, rather than just buying a new gas cap.

have fun with your jeep
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Unread 12-13-2004, 11:19 AM   #6
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idler pulleys can be hard to find sometimes, AutoZone, Advance and Pep Boyz do not carry them and it may take your Napa store a day or two to get it. I wish I could have just rebuilt mine when it went rather then searching for 2 days to find someone local that had one in stock.
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Unread 12-13-2004, 01:14 PM   #7
Ishodu
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Quote:
Originally Posted by ctavel
A new idler pulley costs les than 20 bucks, so unless the bearing replacement was super cheap I suggest you just buy a new one....

Just my opinion
Both bearings cost me about 6 dollars. For 2 pulleys!
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Last edited by Ishodu; 12-13-2004 at 04:39 PM..
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Unread 12-13-2004, 01:53 PM   #8
balloo93
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Thanks for the write up, I appreciate it. I would love to do my own when mine go out just to say I did it. That and the bearings only being $6 doesn't hurt either. I will post a link to this thread in the Tech/FAQ.
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Unread 12-13-2004, 02:12 PM   #9
jandj
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to save $14 I'll probably just replace the bearings next time. Especially if I had to wait longer than 30 minutes for the pulley. THanks for the info...
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Unread 09-06-2010, 10:26 AM   #10
102joe
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It seams that these bearings go bad allot does anyone know of a upgrade ? a heaver bearing ?
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Unread 09-06-2010, 11:49 AM   #11
AZ Jeff
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Quote:
Originally Posted by 102joe View Post
It seams that these bearings go bad allot does anyone know of a upgrade ? a heaver bearing ?
They go bad a lot because the NEWEST XJ is 9 years old. It's not surprising that a 9 year old vehicle would need an idler pulley replaced.
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Unread 09-06-2010, 09:33 PM   #12
102joe
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Quote:
Originally Posted by AZ Jeff View Post
They go bad a lot because the NEWEST XJ is 9 years old. It's not surprising that a 9 year old vehicle would need an idler pulley replaced.
well Jeff it is surprising that the aftermarket ones I replaced a year ago already went bad. The factory bearings ran about 13 years & 100,000 + miles. I think the problem is with the China or Taiwan bearings the after market manufactures use. So I am wondering if there is a alternative to going with the over priced OEM ones from Chrysler. Thanks for your input tho
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Unread 09-06-2010, 09:38 PM   #13
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Quote:
Originally Posted by 102joe View Post
It seams that these bearings go bad allot does anyone know of a upgrade ? a heaver bearing ?
Use a good quality bearing, like SKF, F A G, (the automatic censor doesn't like this bearing manufacturer's name) or Timken.
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Unread 09-06-2010, 09:43 PM   #14
tangofox007
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Quote:
Originally Posted by Ishodu View Post

What your going to need:
2 6203-2RS/C3 bearings
Are you sure that C3 clearance bearings are necessary for an idler pulley?

Quote:
Originally Posted by Ishodu View Post
Not sure if all jeeps would use the same bearings or not.
They don't.
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Unread 05-28-2015, 09:55 PM   #15
jeff1234
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ez bearings 2 of them to my door for 16.35 total 1639 rothsvill road lititz pa 17543 item 66203-2rs skf FYI If you remove pullyes pry seal out re back bearings when you replace serp belt you will get 177,000 miles out of them like I did matter of fact the bearings are still good the seals just got hard and crackes a little i'd just bought the seals if i could locate them...i'll look on line some day i'll find just the seals and have on shelf 2 good spare parts..fyi some swimming pool pumps use same berring also. ..so just did a valve job on my wifes 97 rwangler.. oh runs perfwecr had weak intake valve No 1 cyl code 301..county maching brian in san jacinto can't beat him perfect guy perfect valve job labor for me to remove head was simple..one thing i'd like is more info on valve adjustment can they be adjusted while running? lots of mixed info I' torqued nuts to 21ftlbs? but is their a sure better way as to allow for wear of cam and lifters ect?
`2.5 moroe cast head.
` it has been off road 1 time in 15 yrs because i never get to drive it.. sorry no spell check and i'm all thumbs

Last edited by jeff1234; 05-28-2015 at 09:57 PM.. Reason: spelling
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