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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 10-18-2011, 12:41 AM
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For all to benefit, WHERE are the ends of these hoses in our beloved E39s anyway?

I'm trying to locate all the vacuum hoses in the E39:
> Might we be able to list, with pics (realoem diagrams ok) of ALL E39 vacuum lines?

The realoem diagrams come up short in explaining exactly where the ends are for some of the hoses.

May I ask the tribe to pitch in and identify, for all to see, the end points of these various hoses?
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  #2  
Old 10-18-2011, 12:43 AM
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Where exactly (and to what) does this hose connect (labeled 5 on the diagram below)?

Do we have a good in-situ picture of this termination point?

Engine => Vacuum control => Vacuum control - engine
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  #3  
Old 10-18-2011, 12:48 AM
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Engine => Cylinder Head => Crankcase-Ventilation/oil separator

Where exactly does the other end of #6 go on the E39s that do have a vacuum hose there?

Do we have an in-situ picture of that hose #6 termination point?

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Last edited by bluebee; 10-18-2011 at 01:36 AM.
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  #4  
Old 10-18-2011, 12:54 AM
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Where exactly does the fuel-tank breather valve reside?
- E39 (1997 - 2003) > fuel tank breather valve 2001 525

Fuel Preparation System => Fuel injection system => FUEL TANK BREATHER VALVE

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  #5  
Old 10-18-2011, 12:59 AM
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Engine => Vacuum control => AIR PUMP F VACUUM CONTROL

Where exactly (a picture would be helpful) does #7 connect (presumably to either the CCV valve or to the intake manifold)?

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Last edited by bluebee; 10-18-2011 at 01:41 AM.
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  #6  
Old 10-22-2011, 11:00 AM
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Out of over ten thousand posts (probably a thousand threads or so), this is the first thread where nobody professes to know the answer to the questions asked!

I bump this, as a rather weak next step before I move on to the other options available to find the answer ...
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  #7  
Old 10-23-2011, 07:42 AM
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Quote:
Originally Posted by bluebee View Post
Where exactly (and to what) does this hose connect (labeled 5 on the diagram below)?

Do we have a good in-situ picture of this termination point?

Engine => Vacuum control => Vacuum control - engine
It attaches to a large vacuum port on the bottom on the intake, exactly in the position that it shows (center, close to the attachment point). It is attached with a squeeze clamp that is meant to be permanent, although it can obviously be removed if you gain access. It's nearly impossibe to reach without removing the intake.
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  #8  
Old 10-23-2011, 07:44 AM
Manybrews Manybrews is offline
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Quote:
Originally Posted by bluebee View Post
Engine => Cylinder Head => Crankcase-Ventilation/oil separator

Where exactly does the other end of #6 go on the E39s that do have a vacuum hose there?

Do we have an in-situ picture of that hose #6 termination point?

That doesnt exist on most e39s. I believe it was deleted around 97 (dont quote me on the date).
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  #9  
Old 10-23-2011, 07:45 AM
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Quote:
Originally Posted by bluebee View Post
Engine => Vacuum control => AIR PUMP F VACUUM CONTROL

Where exactly (a picture would be helpful) does #7 connect (presumably to either the CCV valve or to the intake manifold)?

There are two vacuum ports on the rear of the intake manifold. One should be plugged. The other will attach to that.
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  #10  
Old 10-23-2011, 07:47 AM
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Quote:
Originally Posted by bluebee View Post
That's a terrible picture. But the vent valve is located on the underside of the front of the intake manifold. Roughly behind the alternator and p/s reservoir.
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Old 10-23-2011, 07:47 AM
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Quote:
Originally Posted by bluebee View Post
Engine => Vacuum control => AIR PUMP F VACUUM CONTROL

Where exactly (a picture would be helpful) does #7 connect (presumably to either the CCV valve or to the intake manifold)?

I believe this one connects to the intake manifold. It is intake manifold pressure that activates the SAP valve. The electric valve simply controls when the intake pressure is felt at the valve. Not 100% sure but more than 80%, if that helps.
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  #12  
Old 10-23-2011, 07:48 AM
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Quote:
Originally Posted by Manybrews View Post
That doesnt exist on most e39s. I believe it was deleted around 97 (dont quote me on the date).
+1, this was deleted (plugged) on my e39 CCV.
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  #13  
Old 10-23-2011, 12:07 PM
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I think it is my fault for asking multiple questions in a single thread ... so I do thank you for the answers.

Quote:
Originally Posted by Manybrews View Post
That [ccv valve vacuum port] doesnt exist on most e39s. I believe it was deleted around 97 (dont quote me on the date).
Quote:
Originally Posted by Fudman View Post
+1, this [ccv valve vacuum port] was deleted (plugged) on my e39 CCV.
I understand. In fact, that ccv vacuum hose is probably not on my 2002 M54 engine either.

Q: But where 'did' the #6 CCV vacuum port hose go on the E39's that DID have them?

Quote:
Originally Posted by Manybrews View Post
It attaches to a large vacuum port on the bottom on the intake, exactly in the position that it shows (center, close to the attachment point).
I guess I misunderstand because I don't 'see' this hose on my M54 ... but I'll take another look and post the best I can snap a photo of.

By "intake", do you mean that six-inch diameter rubber boot that goes from the air filter to the MAF to the throttle body?

Quote:
Originally Posted by Fudman View Post
I believe this one [sap hose #7] connects to the intake manifold.
Quote:
Originally Posted by Manybrews View Post
There are two vacuum ports on the rear of the intake manifold. One should be plugged. The other [sap hose #7] will attach to that.
So it probably goes to a second port (i.e., #9 vacuum vent cap) right next to the plugged up port?

I wonder what the difference is between the two ports?

I'll see if I can remove the plastic covers on my M54 and see if I can see if there are two vacuum ports on the back of the intake manifold.

Quote:
Originally Posted by Manybrews View Post
the [fuel tank breather valve] vent valve is located on the underside of the front of the intake manifold. Roughly behind the alternator and p/s reservoir.
Well, if it's in the engine bay, I should be able to locate it to snap a picture of it.

Thanks for the tips ... Armed with the location to look, I'll try to find the ends if I can and post pictures (and then update the vacuum threads so that the next person picks up where we leave off).

Last edited by bluebee; 10-23-2011 at 12:09 PM.
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  #14  
Old 10-23-2011, 03:09 PM
poolman poolman is online now
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Blue Bee--All of the questions that you have posed here on just where these vacuum hose reside were in the thread Battling Vaccum Leaks---they were scattered through out that post as I found the spots and people that were interested in finding those spots had instructions on just where I located the vacuum ports. I can't resurect the posts now. I noticed that below my second post you were the first one to come up and that shows that it occured yesterday--my post concerning the subject was from 2008 and then your post is the first one afterwards --there are 115 post lost --any idea on how to bring them back or where they disappeared too?
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  #15  
Old 10-30-2011, 05:34 PM
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Quote:
Originally Posted by poolman View Post
any idea on how to bring them back or where they disappeared too?
For the record, we (poolman, doru, chris330i, and I) tried to find those 115 posts but they don't appear to be in that thread.

I'm sure 'all' the locations for vacuum leaks are documented; but the problem is they are scattered all over Kingdom come.

We need to answer the myriad questions, and then summarize in a simple-to-follow thread (which doesn't exist yet).

For my part, I've opened the somewhat confusing array of threads below to ascertain key components of the problem:
- How to locate all problematic (between 1/8" & 9/32" ID) 3.5x1.8mm, 3.3x1.8mm & (between 17/64" & 9/32" ID) 7mm ID vacuum tubing (single material), vacuum hoses (multiple material), 3.3mm OD curved vacuum pipes (rigid tubes), 3.5mm & 7mm ID vacuum endcaps (closed end) & 7x3mm manifold o-rings (1) & 7.52X3.52mm and 9.2X2.8mm fuel injection o-rings in the E39 engine bay (1) & where to get new vacuum tubing & vacuum caps (1) & what SAE sizes to get for all the metric M54 engine vacuum tubes, hoses, pipes, and caps (1) & correcting the F-connector errors in the realoem diagrams (1) & finding the ends of hard-to-locate vacuum tubes (1) & sorely needed clarification on how the M54 CCV vacuum port works on the E39 M52 CCV valve connection to the fuel pressure regulator connection (1)

Last edited by bluebee; 11-06-2011 at 11:03 AM.
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  #16  
Old 11-26-2011, 11:08 AM
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For the record, 16Valex & JimLev helpfully updated the location of the end hoses for the purge valve diagram today, over here:
- E39 (1997 - 2003) > EVAP Purge Valve Flow

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Old 11-27-2011, 08:53 AM
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For the record, Bomb5 & Steve530 helped elucidate the well-hidden locations of the endcaps and SAP electrical valve vacuum tubing at the back of the M54 engine over here:
- M54 vacuum tubing ... what diameter ... what brand ... what material ... what length?

Some related photos of the endcaps are below:

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  #18  
Old 12-26-2011, 07:33 PM
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I was browsing and found a nice photo of the back of a M54 intake manifold with hoses attached. I edited and annotated the photo to show the location of the attachment of the fuel tank breather (purge) valve and the suction jet pump.

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  #19  
Old 12-29-2011, 11:31 PM
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Nice pic.

That ones a keeper.

Shows the ccv vacuum cap also.

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  #20  
Old 12-30-2011, 01:34 PM
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Here's that pic, shrunk to 640x480, and flipped to match Steve's excellent annotations!

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  #21  
Old 01-10-2014, 10:19 AM
lsrguy98 lsrguy98 is offline
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I've been reading this thread for a bit. I searched for some type of vacuum schematic for my 99 528i and can't find one. Can someone point me in the right direction? Also, why is there a reduced sized vacuum pipe in between the two larger pieces of hose between the two valves?

Thanks
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  #22  
Old 01-10-2014, 08:48 PM
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Quote:
Originally Posted by lsrguy98 View Post
I've been reading this thread for a bit. I searched for some type of vacuum schematic for my 99 528i and can't find one. Can someone point me in the right direction? Also, why is there a reduced sized vacuum pipe in between the two larger pieces of hose between the two valves?

Thanks
This is a good question, and, since I don't have a 528i, I can't help - but I think that's the model that cn90 has. He's been a godsend by snapping pictures and doing DIYs which, I'd wager, cover everything you would want to do.

So, my suggestion is to first look up your VIN in realoem, and then after searching through all those diagrams (just like I have already done, above, for the M54 engine), if there are still questions, then search for any thread by cn90 with the phrase "vacuum hose" in it. I'm sure he'll have posted complete annotated pictures (he's a genius at documentation).

If, after those two efforts fail (and, well they might), then add to this thread, which, I just noticed, was posted today, and which seems to be the exact topic:
> E39 (1997 - 2003) > Comprehensive m52 vacuum diagram guide

See also:
- How to locate all problematic (between 1/8" & 9/32" ID) 3.5x1.8mm, 3.3x1.8mm & (between 17/64" & 9/32" ID) 7mm ID vacuum tubing (single material), vacuum hoses (multiple material), 3.3mm OD curved vacuum pipes (rigid tubes), 3.5mm & 7mm ID vacuum endcaps (closed end) & 7x3mm manifold o-rings (1) & 7.52X3.52mm and 9.2X2.8mm fuel injection o-rings (1) & gaskets (1) on the M54 engine & where in the USA to get new vacuum tubing & vacuum caps (1) & what SAE sizes to get for all the metric M54 engine vacuum tubes, hoses, pipes, and caps (1) & correcting the F-connector errors in the realoem diagrams (1) & finding the ends of hard-to-locate vacuum tubes (1) & sorely needed clarification on how the M54 CCV vacuum port works on the M52 CCV valve connection to the fuel pressure regulator connection (1) & how to make, borrow, or buy lean-condition misfire test tools to test for vacuum leaks & lean conditions (1) (2)
- All the BMW E39 engine technical information you want to know about the M52 engine (pdf) and the M54 engine (pdf) & the M62 engine (pdf)
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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

Last edited by bluebee; 01-10-2014 at 08:53 PM. Reason: Added references
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Old 01-11-2014, 08:51 AM
lsrguy98 lsrguy98 is offline
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All great information. I'll begin reading this morning.

Thanks!
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  #24  
Old 07-05-2014, 02:48 AM
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I came here to find the "corrected" hose for the sas air system:
- Correcting the F-connector errors in the realoem diagrams (1) & finding the ends of hard-to-locate vacuum tubes (1)

But, since it wasn't here, I add it now so that it can be found in the future.

See also:
- How to locate all problematic (between 1/8" & 9/32" ID) 3.5x1.8mm, 3.3x1.8mm & (between 17/64" & 9/32" ID) 7mm ID vacuum tubing (single material), vacuum hoses (multiple material), 3.3mm OD curved vacuum pipes (rigid tubes), 3.5mm & 7mm ID vacuum endcaps (closed end) & 7x3mm manifold o-rings (1) & 7.52X3.52mm and 9.2X2.8mm fuel injection o-rings (1) & gaskets (1) on the M54 engine & where in the USA to get new vacuum tubing & vacuum caps (1) & what SAE sizes to get for all the metric M54 engine vacuum tubes, hoses, pipes, and caps (1) & correcting the F-connector errors in the realoem diagrams (1) & finding the ends of hard-to-locate vacuum tubes (1) & sorely needed clarification on how the M54 CCV vacuum port works on the M52 CCV valve connection to the fuel pressure regulator connection (1) & how to make, borrow, or buy lean-condition misfire test tools to test for vacuum leaks & lean conditions (1) (2)

Here's a picture of my SAS hose ...


EDIT: Here's a nice description and diagram of the SAS:
- What are the components of the secondary air system SAS (1)
Quote:
Originally Posted by Kibokojoe
Secondary Air pump (SAP) troubleshooting and repair. (2000 BMW E39 528i)
If you are receiving two OBD errors P1421 and P1423 it may be your SAP system. I have read several of the online manuals and Bentleys is worthless, they all gave me a headache by the time I was finished. They all made it harder to determine the problem then they needed too. So to help the next guy (simply) through this problem here is my write up.
Take a look at the illustration there are four major components to the SAP system.
  1. Secondary air pump (SAP
  2. Air pump valve (APV)
  3. Electric valve (EV)
  4. Non-return valve (NRV)
First test detach hose from the SAP at the APV (# one with a yellow circle). Mine has the squeeze ring. Once detached have someone start the car. Car has to be cold for at least 4 hours. Feel for air is blowing from the SAP.
If blowing SAP is good
If no blowing SAP bad
If SAP is blowing feel the inlet side of the APV if you feel exhaust APV is bad. Test for one minute to see if valve eventually closes.
If APV is closed check the vacuum on the APV. I used a mitivac. Check APV by itself (it should hold a vacuum with no leaking). Then check the hose running from the APV to the manifold. I attached the mitivac at point A and put my finger over point B. This is where I found my leaků. hose was rotten. Check the rest of the hose from C to the manifold.
The NRV is directional (Arrow). You can check it with the mitivac, I just sucked on it to determine the direction of the flow, it only goes one way. If you can draw air both directions the NRV is bad.
The biggest pain in this project was getting the EV out for inspection. The EV is under the back of the intake manifold and you have to use a small mirror and a flashlight to see and determine how to get the EV off of the mounting bracket.
Remove the right side air box
Remove the beauty covers from the top of the engine. Makes it easier to check the vacuum hoses and to get at the EV
While you're doing this it is best if you replace all the hoses # 7 and #4.
If you look at the side picture of the EV you will see a clip. You have to pull the EV towards you while pushing in on the clip towards the engine. I used a thin blade 6" screwdriver. Unless you have someone to hold the mirror and light you will have to do this blind. Also the on-line illustration of the EV are backwards. (red arrow).
Kibokojoe
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See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 08-15-2014 at 10:13 AM.
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  #25  
Old 07-06-2014, 07:23 PM
lsrguy98 lsrguy98 is offline
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Hoses

Hoses 3 and 4 were just one hose on my 58i. It was so brittle it snapped right off. BMW sells this high temp emission hose for about $32. I just bought some Teflon hose off of Ebay for $5 and used it. The two rubber ends of the hoses in red are metric and the hose I bought was SAE so I used a little RTV 732 being careful not to get any inside of the hose that would black the vacuum. If you use the RTV let it dry for a day or so.
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