Heater Hoses maintenance at 150K - Page 2 - Bimmerfest - BMW Forums



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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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  #26  
Old 04-15-2017, 10:14 AM
yuuts yuuts is offline
Uh.. Did you say "yuuts"?
Location: Wisconsin
 
Join Date: Sep 2014
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Mein Auto: 540i 6 spd. sport
As I recall mine started with a pinhole at the rear of the engine at the clamp... where they almost always seem to begin their leaking. 2000 540i 150K on it.

Since the clamp area seems to be the weak point, I put a wrap of thick rescue tape under the clamp at both ends of the hoses. Not sure if I did anything good, but it certainly wasn't anything bad.
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  #27  
Old 12-07-2019, 06:37 PM
Jeckler1227 Jeckler1227 is offline
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Location: Willows,CA
 
Join Date: Nov 2019
Posts: 4
Mein Auto: 1998 528i 5-speed Manual
Would you happen to know how to replace the coolant hose from the BOTTOM of the expansion tank(pretty sure it was #11 in your diagram), that runs across the fan shroud to near the air intake(im new to this). I was able to do a coolant system overhaul besides this hose. Unfortunately i believe the hose came into friction with the ac compressor which helped tear it apart. I have no clue how to replace this hose. not sure how to post a picture sorry( Btw i have a 1998 528i 5-speed Manual (prod date 09/1997)

Last edited by Jeckler1227; 12-07-2019 at 06:44 PM.
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  #28  
Old 12-07-2019, 09:14 PM
cn90 cn90 is offline
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Location: Omaha NE
 
Join Date: Mar 2006
Posts: 14,967
Mein Auto: 1998 528i 5-sp 140K+
The reason that hose rubs the AC pulley is that: someone did the work on the car such as changing reservoir, when done they forgot to clip that hose to the plastic clip on the radiator shroud. Look carefully at the bottom of the radiator, you will see that plastic clip.

Anyway, that hose PN is 11531744054. Buy only BMW brand, not aftermarket if possible.

Below is my photo from another job but I labeled that hose with yellow dots.
Once the Air Mass Meter and the Intake Boot are out, you can clearly see the hose.
Make sure you note the routing of the hose beforehand.


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  #29  
Old 12-07-2019, 09:25 PM
Jeckler1227 Jeckler1227 is offline
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Location: Willows,CA
 
Join Date: Nov 2019
Posts: 4
Mein Auto: 1998 528i 5-speed Manual
That someone would definitely be me *sigh* lol. All that work for another redo.Hopefully third times a charm. Anyways thanks for the vivid description and pics to help!! I took pics but its asking me for a URL(all i have is a .JPG).

How difficult would you say removing the Air Mass Meter and Intake Boot would be? Im a real rookie but i managed to do a cooling system overhaul last month. well technically i failed. Any special tools involved?
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  #30  
Old 12-07-2019, 10:55 PM
cn90 cn90 is offline
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Location: Omaha NE
 
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Mein Auto: 1998 528i 5-sp 140K+
Very easy...

I wrote a CCV ICV etc. DIY 10 years ago, please see the link below.
https://www.bimmerfest.com/forums/sh...d.php?t=379225

Everything you need is in the first photo.
Just common sense, 10-mm socket, basic screwdriver.
Nothing fancy.
Once the MAF and rubber boot are out, the heater hose you mentioned is right there...

PS: I admire that you are a novice but already attempted cooling overhaul...
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  #31  
Old 12-08-2019, 07:53 AM
Jeckler1227 Jeckler1227 is offline
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Location: Willows,CA
 
Join Date: Nov 2019
Posts: 4
Mein Auto: 1998 528i 5-speed Manual
Ok I'll have to order the part and give it a go. Thanks for the insight!! Will I need new Clamps(I saw the picture it says to cut Clamp connected to the air mass meter near the frame of car )??!

Last edited by Jeckler1227; 12-08-2019 at 09:18 AM.
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  #32  
Old 12-08-2019, 01:19 PM
cn90 cn90 is offline
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Location: Omaha NE
 
Join Date: Mar 2006
Posts: 14,967
Mein Auto: 1998 528i 5-sp 140K+
That big clamp: I never replaced it. It served no purpose.
Just put things back when done, no need for that clamp.
This is on the intake air side before the air filter itself.
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