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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 04-24-2015, 12:52 PM
aioros aioros is online now
aioros
Location: Wildomar, CA
 
Join Date: Feb 2009
Posts: 639
Mein Auto: '99 528i auto , '01 330xi
A/C O-rings and plastic tip

Does anybody know how important is the plastic tip on the a/c lines just like the yellow one in the picture below? (Some platic tips are black)
And why is it so hard to get the right size o-rings for our bmw?
I posted this on the e46fanatics forum, since the a/c issue is on my 01 330xi, but no one answered.
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  #2  
Old 04-24-2015, 01:14 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 24,119
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by aioros View Post
And why is it so hard to get the right size o-rings for our bmw?
It's a community effort, so, if you know of an o-ring size that is missing, please add it to the canonical thread:
> E39 (1997 - 2003) > Complete list of all o-rings (by size & by part number) to buy when ordering parts

In that thread, found by typing /o-ring f3 in the bestlinks, we have tried to list all the commonly replaced o-rings with their part numbers and physical sizes.

But, if we're missing some, please add them so the next person starts off where you left off.

See also:
- Where to find all the vacuum hoses, tubes, pipes, and endcaps in the E39 engine bay (1) & where are all the fuel injection o-rings (1) & how to locate all the o-rings (1) and gaskets (1) & where in the USA to get new vacuum tubing & end caps (1) & what SAE sizes to get for all the metric M54 engine vacuum tubes, hoses, pipes, and caps (1)
__________________
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #3  
Old 04-24-2015, 02:17 PM
aioros aioros is online now
aioros
Location: Wildomar, CA
 
Join Date: Feb 2009
Posts: 639
Mein Auto: '99 528i auto , '01 330xi
I ordered most of the oring from the dealer and the rest from autohausaz. I will post part #'s and sizes later on.
How about the plastic sleeve/tip?
I asked some friends/coworkers mechanics about those plastic tips but they have never seen one before (two of those mechanics are certified licensed a/c technicians with 20+ yrs of work experience) but clearly they dont work on bmw
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  #4  
Old 04-28-2015, 08:05 AM
GTKeller GTKeller is offline
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Location: Dyer Indiana
 
Join Date: Nov 2014
Posts: 15
Mein Auto: 2000 540i
I believe the color coded hoses in the AC circuit are for designation only. They could be for refrigerant type and or the suction/discharge side of the refrigeration circuit. Also o-rings for refrigerant/freon are made of a special material, not typical rubber so make sure they are the correct type or they are going to leak after some time. The color coded material on the lines do not need to be replaced.
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