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Unread 07-17-2010, 01:37 PM   #1
compcrasher86
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98 xj 4.0 ac compressor pulley bearing

Alright guys check out this video, YouTube downgraded it outta hd quality but the audio is the most important. Basically my ac compressor has been causing a ruckus. I don't use nor do I want ac and the clutch for the compressor is shot anyways. What's my best fix and how can I get this working again? I would embed it but I'm on my iPhone and it's tough enough making a post


http://www.youtube.com/watch?v=uE4Uv...=youtube_gdata

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Unread 07-17-2010, 02:10 PM   #2
Holder350
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Well sounds like the bearing is not in very good shape, however the bearing is non replaceable...not that you cant get the bearing out and a new one in....but that they do not make a bearing to replace it.

I heard about someone finding 2 bearings 10mm wide to make up for the one 20mm bearing....but a better option is to get another clutch assembly from the junk yard or a parts store.
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Unread 07-17-2010, 02:17 PM   #3
robsjeepxj
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Well sounds like the bearing is not in very good shape, however the bearing is non replaceable...not that you cant get the bearing out and a new one in....but that they do not make a bearing to replace it.

I heard about someone finding 2 bearings 10mm wide to make up for the one 20mm bearing....but a better option is to get another clutch assembly from the junk yard or a parts store.
Not true. The pulley bearing is readily available from many parts store, advance and napa to name a few. The problem is getting the pulley off and replacing the bearing without damaging the pulley. They warp very easily and are difficult to get off unless you have the proper tools to do the job right. You'll find a few good articles on this by doing a search.
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Unread 07-17-2010, 02:21 PM   #4
compcrasher86
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Originally Posted by robsjeepxj View Post
Not true. The pulley bearing is readily available from many parts store, advance and napa to name a few. The problem is getting the pulley off and replacing the bearing without damaging the pulley. They warp very easily and are difficult to get off unless you have the proper tools to do the job right. You'll find a few good articles on his in the FAQ/Tech section or do a search.
Right on! I'll do some more research tonight when I get my laptop back but I'd appreciate all and any articles links and part numbers and knowledge people have on this task
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Unread 07-17-2010, 02:23 PM   #5
robsjeepxj
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Do the search it will give you a bunch of articles to choose from.
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Unread 07-17-2010, 02:33 PM   #6
Holder350
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Quote:
Originally Posted by robsjeepxj View Post
Not true. The pulley bearing is readily available from many parts store, advance and napa to name a few. The problem is getting the pulley off and replacing the bearing without damaging the pulley. They warp very easily and are difficult to get off unless you have the proper tools to do the job right. You'll find a few good articles on this by doing a search.
Would you please post the part number for said bearing?

Last time I looked thru the 4seasons catalog, they didn't even offer the clutch by its self.
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Unread 07-17-2010, 02:34 PM   #7
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I just had this problem on my 2000yr model last weekend. I had a rumble that took about 3 months to track down to the ac pump idler bearing/pulley. I was short of time so figured it would be fine for one more weekend while I attended a 4x4 event. As luck would have it, it practically seized on the first day, smoke, rumbling and squealing and just about managed to limp back to the event HQ to check-in at the end of the day. Luckily I had an old compressor from a 1993 4ltr and had taken it along just in case. I swapped it in that night and had the motor running for day 2.

The air-con wasn't working well anyway so I wasn't bothered about losing the system. I suggest you get a cheap second hand pump with a good idler bearing (it doesn't matter if the pump ac seals are shot so someone elses cast off will do). You can then strip out the rest of the system to improve airflow to the engine rad and give you more room under the hood
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Unread 07-17-2010, 04:07 PM   #8
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I tried to get the bearing off and broke the seal on the clutch. I ended up getting new everything. Compressor, exp valve and dryer. If I didn't need air I would have bought a bypass for 50 bucks..

If you don't have the exact puller you'll never get the bearing off... If you can get it off and back on you're in business ..
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Unread 07-17-2010, 05:49 PM   #9
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You can look on Sanden's website for step by step instructions on how to do it with the proper tools I just used a hammer and flat chisel to drive off the puller after I took the clutch off and the snap ring then a large socket to drive the old bearing in and out. If your careful it can be done without messing up the pulley. Properly supporting it while your working on the bearing is the key.
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Unread 07-17-2010, 07:59 PM   #10
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Do compressors from the earlier year xjs fit the bracket?! There are a couple old xjs with ac in the junkyard. Bypass for $50 sounds like just my kind of deal though. I'm open to any and all options come to think about it but id like to research this bearing some more

So I guess the next main question is if I wanted to replace the compressor how do I disconnect the compressor from the system?
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Unread 07-17-2010, 09:02 PM   #11
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The older compressors do fit, however it will not connect to your lines

To change the compressor you should have the system evacuated, change the compressor and the accumulator, and then the charge that was pulled out put back in.
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You can tell the character of a person in how they treat someone who can do nothing for them.
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Unread 07-17-2010, 10:14 PM   #12
compcrasher86
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I nEed to check my pressure I may have lost all of it in my previous front end collision
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Unread 07-17-2010, 10:31 PM   #13
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You can just hit the valve core to see if there is any pressure on the system....if not then pull it apart
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98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
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You can tell the character of a person in how they treat someone who can do nothing for them.
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Unread 07-18-2010, 07:39 AM   #14
compcrasher86
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what do you mean by hitting the valve core? Sorry if I sound like a newbie I haven't worked with A.C. systems much in my automotive experience
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Unread 07-18-2010, 07:52 AM   #15
compcrasher86
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edit: see next post
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Last edited by compcrasher86; 07-18-2010 at 08:19 AM..
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