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X3 E83 (2004 - 2010)
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  #1  
Old 07-01-2011, 03:00 PM
handersen8 handersen8 is offline
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2005 x3 serpentine and ac belt change

Hey Guys,

It is time to change the serpentine and ac belts on my 2005 x3 3.0. Has anyone done this job on an x3? Will I need a special tool to remove the fan? Is it the same process that I have seen for the 3.0 for other bmw's?

Thanks,

Hans
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  #2  
Old 07-01-2011, 05:32 PM
Supercourse Supercourse is online now
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Mein Auto: 2004 X3 2.5i
Don't think we have a specific write-up for belt change, but you can just do Steps 3 thru' 5 in this very comprehensive cooling system DIY. (Starting at post #5)

http://www.bimmerfest.com/forums/sho...d.php?t=517819

Sounds like the cooling fan comes out easier than you might think, as long as you have the correct torx socket on hand, and something to pry a plastic connector apart.

Only variations might be hydraulic vs. mechanical tensioners in the way you release the tension.

Should be a < 1 hr. job even allowing for dropped fasteners having to be retrieved from crevices in the black vinyl undershield.

(You may not need to remove the airbox for doing belts - just the snorkel.)

Last edited by Supercourse; 07-01-2011 at 05:35 PM. Reason: AFTERTHOUGHT on no need to remove airbox.
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  #3  
Old 07-01-2011, 09:56 PM
handersen8 handersen8 is offline
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I think supercourse is my new best friend. When you're in las vegas, I owe you a beer or two.

Hans

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  #4  
Old 07-03-2011, 10:00 PM
humbertob humbertob is offline
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Very easy to diy ! Just did mine 2 weeks ago in less than 45 min, it's awesome how easy is to work on the X3 !


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  #5  
Old 07-04-2011, 02:37 PM
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jman103099 jman103099 is offline
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I was in for service for something else and the dealer replaced these two belts for 180 bucks I believe. Im sure I could have had an Indy do it, but I didnt think 180 was bad (with 10% CCA discount on top of that).
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  #6  
Old 07-09-2011, 06:42 AM
911 911 is offline
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Thanks for my info & link - just did my two belts in about an hour.
Only thing i was not ready for was a cable tie - one of the fan connectors had a small cable tie (to keep the wires snug) that had to be cut to remove the fan.
Luckily I had one in the basement - overall a very easy DIY
I would call it a 2 on scale from 1-2 on difficulty.
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  #7  
Old 08-04-2011, 09:20 AM
didymos didymos is offline
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two weeks ago I was changing the steering fluid and saw how cracked the water pump (serpentine) belt was (every 2 mm on the groove). Took on the project last weekend. the instructions above a very helpful, easy DIY but putting the new serpentine belt required a second person to hold the tensioner.

When I checked, idlers, all needed to be changed. The dealer does not sell AC idler, just the whole tensioner it goes for$130 and the two serpentine idlers go for $60 each! I went to Napa but they did not have the serpentine belt idlers, nor did O'Reilly. But Advanced had. Each idler cost about $18. So the whole project was about $100. The ac bet had just first crack so I kept it just in case.

Napa ac belt: 040340
Napa serp belt: 6K605
Napa ac tens idler: 219301
Advance serp idler: 89144 or the one below
Advance serp tens idler: 89017 or the one above, do not remember where I put which but the tens idler has smaller diameter than serp idler

FYI: plastic covers that are on the original idlers do not attach to the Napa and Advance parts. I kind of see the sense of them to block the dirt from getting to the bearings but on the other hand, I did not see that solution in other brand cars.

Last edited by didymos; 08-04-2011 at 05:28 PM.
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  #8  
Old 08-04-2011, 10:22 AM
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mlukas161 mlukas161 is offline
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Quote:
Originally Posted by didymos View Post
When I checked, idlers, all needed to be changed. The dealer does not sell AC idler, just the whole tensioner it goes for$130 and the two serpentine idlers go for $60 each! I went to Napa but they did not have the serpentine belt idlers, nor did O'Reilly. But Advanced had. Each idler cost about $18. So the whole project was about $100. The ac bet had just first crack so I kept it just in case.
How do you know when the tensioner is bad? I just changed my serpantine and AC belts recently at 110,000 miles and was wondering if the tensioners needed replacing as well.
It seems like they're still doing their job as far as I can tell. Do they fail?
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  #9  
Old 08-04-2011, 10:29 AM
didymos didymos is offline
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everything can fail but as long belts do not wobble when engine is running, you're good; wobbling belt will either fell off or wear out so fast that can break while driving, the role of the tensioner is to pick up any looseness
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  #10  
Old 08-04-2011, 11:58 AM
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mlukas161 mlukas161 is offline
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Quote:
Originally Posted by didymos View Post
everything can fail but as long belts do not wobble when engine is running, you're good; wobbling belt will either fell off or wear out so fast that can break while driving, the role of the tensioner is to pick up any looseness
Great. Thanks for the reply!
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  #11  
Old 03-17-2012, 04:06 PM
didymos didymos is offline
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updated, after 8 months, AC pulley gave up, I am replacing Napa pulley, with the part from Advanced (#89133) because other two installed in the summer are still in a good shape, this one is almost twice as much, I guess it is a common failure part
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