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Old 05-27-2013, 03:00 AM   #1
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A/C Compressor Noise - What to do

Let me go ahead and say 2.4L stock 04 TJ with ~45k miles. So a few weeks ago I had some issues with my fan belt and pulleys. It got a little wet after a mudding/water fording adventure, and caused the tensioner pulley to seize and rip off a few days later. No big deal, $40ish for a new pulley and belt to fix that, then went ahead and replaced the two idler pulleys while I was at it. For a day it sounded perfect, no noise anywhere, and I thought I got away almost scot free.

Then I heard it. The compressor pulley started howling. I can tell that's what it is because it comes on and off with the ac, and it sounds fine when it's on. But when the clutch is disengaged, and the pulley is idling around it, is when I can hear it howling. So that tells me it's the pulley. I looked it up and was relieved to find that the bearing goes for under $30, if you can find it. I'm praying that that's what this is. So I need some help: what kind and size would the ac compressor bearing be on my 2.4L engine, or where could I find the dimensions? And is it possible for me to get a non ac belt to skip the pulley until I can get it fixed? I hardly use the ac anyway.

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Old 05-27-2013, 03:11 AM   #2
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I just answered the no ac belt question with these convenient diagrams:

http://www.stu-offroad.com/engine/belt/belt-4.jpg

http://www.stu-offroad.com/engine/belt/belt-5.jpg

Which is a big nope. So since the jeep is my only vehicle, I need to fix this asap before the bad bearing causes some real damage. Assuming the bearing IS the problem.

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Old 05-27-2013, 01:24 PM   #3
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Old 05-27-2013, 05:19 PM   #4
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Old 05-27-2013, 11:39 PM   #5
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No one knows anything about this?
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Old 05-28-2013, 10:32 AM   #6
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Ok, from what I've researched, according to this thread, the size of the bearing for a 2000 4.0 is 30mmX52mmX22mm.

http://www.jeepsunlimited.com/forums...d.php?t=397924

And I found it for $25 on bearings direct:

http://bearingsdirect.com/30BGS10DST...-30x52x22.html

Now I need to know: is the ac compressor on a 2000 4.0 tj going to be identical to the one on my 2004 2.4 tj?
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Old 05-29-2013, 12:08 PM   #7
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Anyone?
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Old 05-29-2013, 04:55 PM   #8
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I had an issue with my AC unit also, after submerging it while offroading. It wasnt actuall howling but it was pretty noisy. Mine was just the opposite when off it was noisy and quited down (just a little bit, still noisy) when I turned it on. I wound up replacing the whole unit itself.
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Old 05-29-2013, 06:01 PM   #9
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I replaced my bearing last year. I found the kit on eBay and it was pretty cheap. I had a local mechanic press out the old and press in the new one. You should be able to find the make/model ac compressor somewhere n the unit itself. The good news is you should be able to get the pulley off without having to discharge the system. There were 4 bolts holding mine on and one bold holding the pulley on. I didn't need a puller to get the pulley off either. There are some videos on you tube as well.

Good luck
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Old 05-29-2013, 11:08 PM   #10
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Quote:
Originally Posted by Rayko View Post
I had an issue with my AC unit also, after submerging it while offroading. It wasnt actuall howling but it was pretty noisy. Mine was just the opposite when off it was noisy and quited down (just a little bit, still noisy) when I turned it on. I wound up replacing the whole unit itself.
This is exactly what mine does and exactly what i did to cause it. Noisy when off(not a squeak just loud) and quiets when on. I really hope changing out the bearing will fix it.
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Old 05-29-2013, 11:12 PM   #11
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Quote:
Originally Posted by ChiliPep99 View Post
I replaced my bearing last year. I found the kit on eBay and it was pretty cheap. I had a local mechanic press out the old and press in the new one. You should be able to find the make/model ac compressor somewhere n the unit itself. The good news is you should be able to get the pulley off without having to discharge the system. There were 4 bolts holding mine on and one bold holding the pulley on. I didn't need a puller to get the pulley off either. There are some videos on you tube as well.

Good luck
I'm really hoping someone can give me the info I need before me having to pull the part to find out. I'll look and see if I can find the model ac while it's still in the jeep. Since its my dd, I would prefer to order the bearing, then pull the pulley off once it comes in and fix it all in one go.
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Old 05-30-2013, 06:57 AM   #12
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Quote:
Originally Posted by Double_a914 View Post

I'm really hoping someone can give me the info I need before me having to pull the part to find out. I'll look and see if I can find the model ac while it's still in the jeep. Since its my dd, I would prefer to order the bearing, then pull the pulley off once it comes in and fix it all in one go.
I guess the 2.4 engines have a different belt system because I was able to bypass the ac compressor with a shorter belt until I had the new bearing installed. If I can find the thread and you tube links I will post them for you. Good luck!
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Old 06-06-2013, 10:24 AM   #13
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I'm still looking for the size bearing I need to get. I run the a/c on full blast constantly now because when the clutch engages the sound goes away and everything sounds perfect.
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Old 06-06-2013, 01:40 PM   #14
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So I had the air filter housing out to clean on it, and I snagged a picture of the a/c

Attachment 258336

Ive been looking it up in different ways key words but cant find the info I need.
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Old 06-06-2013, 10:04 PM   #15
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[PDF]View Document - Omega Environmental Technologies http://www.omega-usa.com/.../Rebuild...s%20for%20CD%2... Denso SC06SA (Fiat Early). AVAILABLE ... Sensors for Denso Compressors ..... Jeep. Wrangler. 2003 L4-2.4. 10S17. MC447220-425* H20-4032 H20-3032 ...


I found the above in a google search. The last line describes your jeeps basic info. I used the following in the search line: denso jeep wrangler mc447220-


I tried to open the link but haven't had any luck yet. It may provide some info in the .pdf if you can get it to open.

I'll try to find more to help...keep looking and good luck.
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Old 06-06-2013, 10:31 PM   #16
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Your local parts house can get you an AC compressor hub bearing with the information you have, contact them.
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Old 06-06-2013, 11:40 PM   #17
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Your local parts house can get you an AC compressor hub bearing with the information you have, contact them.
Who would I be trying to contact? There's no specialized shop around that I know of
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Old 06-06-2013, 11:41 PM   #18
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Windows down, doors off. Problem resolved.
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Old 06-07-2013, 07:00 AM   #19
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Windows down, doors off. Problem resolved.
I wish it was. But the sound can be heard when the acs OFF, and kinda goes away when off.
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Old 06-07-2013, 08:15 AM   #20
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Quote:
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Who would I be trying to contact? There's no specialized shop around that I know of
A parts house like NAPA, Autozone, Pep Boys hub bearing for an AC compressor isn't that hard to come by.
You'll need a few specialized tools if you decide to change it yourself, clutch holder and puller, clutch installer, large snap ring pliers and a thickness gauge. No biggie.
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Old 06-07-2013, 06:23 PM   #21
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Quote:
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A parts house like NAPA, Autozone, Pep Boys hub bearing for an AC compressor isn't that hard to come by.
You'll need a few specialized tools if you decide to change it yourself, clutch holder and puller, clutch installer, large snap ring pliers and a thickness gauge. No biggie.
My bad, to me those aren't really specialized stores.
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Old 06-18-2013, 06:12 PM   #22
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I wish it was. But the sound can be heard when the acs OFF, and kinda goes away when off.
Whoops, just noticed this, meant goes away when ON. Still trying to solve this issue, hopefully in the next few weeks.

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