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E60 (2004 - 2010)
BMW 5-Series (E60 chassis) was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E60 is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 04-10-2014, 06:31 PM
cool_dude_208 cool_dude_208 is offline
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Location: Hartford, CT
 
Join Date: Nov 2008
Posts: 73
Mein Auto: 2006 530i, 2007 550i
Help Hose Damaged during Belt Tensioner replacement

On my 2006 530i, I replaced by belt tensioner pulley, idler pulley and when I was trying to put back the Fan I was trying it multiple times and I may have damaged the hose.
It is replacing from small slot under the retainer clip as shown in first image.
I believe the part # is 17127521778. Please correct me if I am wrong.
Not sure how would I replace it. Please help.
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Last edited by cool_dude_208; 04-10-2014 at 06:37 PM.
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  #2  
Old 04-10-2014, 07:01 PM
cool_dude_208 cool_dude_208 is offline
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Location: Hartford, CT
 
Join Date: Nov 2008
Posts: 73
Mein Auto: 2006 530i, 2007 550i
Hose has a hole on the top. What is the functionality of that hole. Since I moved the hoses below the coolant on hoses overflowed?
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  #3  
Old 04-10-2014, 09:13 PM
06530IDAN 06530IDAN is offline
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Location: Long Beach, California
 
Join Date: Oct 2009
Posts: 214
Mein Auto: 2006 530I, Sports Package
I believe that hole is for one of the temperature sensors. That hose is very easy to replace. If I remember it correctly, all you have to do is pry out the metal clip with a flat screw driver, wiggle the hose a bit and pull it straight out. I disconnected that part when I replaced my water pump and thermostat not so long ago. Oh, you should drain the coolant from the drain plug first if you either want to save the coolant or avoid coolant splashing all over the place!

Last edited by 06530IDAN; 04-10-2014 at 09:17 PM.
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  #4  
Old 04-11-2014, 05:13 AM
cool_dude_208 cool_dude_208 is offline
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Location: Hartford, CT
 
Join Date: Nov 2008
Posts: 73
Mein Auto: 2006 530i, 2007 550i
Quote:
Originally Posted by 06530IDAN View Post
I believe that hole is for one of the temperature sensors. That hose is very easy to replace. If I remember it correctly, all you have to do is pry out the metal clip with a flat screw driver, wiggle the hose a bit and pull it straight out. I disconnected that part when I replaced my water pump and thermostat not so long ago. Oh, you should drain the coolant from the drain plug first if you either want to save the coolant or avoid coolant splashing all over the place!

Thanks 06530IDAN. I am thinking the leak is near the coolant sensor attached to that hose.
I saw a video on youtube abt replacing the o-ring on sensor.
Anyone done that? Or is it good idea to replace the sensor itself?
Thanks
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  #5  
Old 04-13-2014, 05:57 PM
cool_dude_208 cool_dude_208 is offline
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Location: Hartford, CT
 
Join Date: Nov 2008
Posts: 73
Mein Auto: 2006 530i, 2007 550i
Update.

The coolant sensor o-ring is what is causing the leak. I have replaced o-ring.. Looks like it is not leaking now. Will have to watch couple of days.

Couple of questions.

1. Do I need to bleed the coolant system. I may have lost an ounce or 2 which I added after the o-ring replacement. Any chance air could have gone in? Coolant was still close to where sensor contacts.

2. Also does the serpentine belt have a manufacturing date printed on it? I may have mixed up the belts while installing and both look almost similar(no visible wear) and one had 090405 which I am assuming is old one and had white thread on the edges worn out at 1 or 2 places and other had 06092013 which I assume is new one. I have finally installed the one which has 06092013 and the rubber on belt looks like dark black.


Thanks.
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