For all to benefit, WHERE are the ends of these hoses in our beloved E39s anyway?

bluebee · Oct 18, 2011

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?

bluebee · Oct 18, 2011

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

Manybrews · Oct 23, 2011

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.

bluebee · Oct 18, 2011

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?

Manybrews · Oct 23, 2011

That doesnt exist on most e39s. I believe it was deleted around 97 (dont quote me on the date).

bluebee · Oct 18, 2011

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

Manybrews · Oct 23, 2011

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.

bluebee · Oct 18, 2011

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)?

Manybrews · Oct 23, 2011

There are two vacuum ports on the rear of the intake manifold. One should be plugged. The other will attach to that.

bluebee · Oct 22, 2011

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 ...

poolman · Oct 23, 2011

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?

bluebee · Oct 30, 2011

poolman said:
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)

bluebee · Nov 26, 2011

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

bluebee · Nov 27, 2011

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:

Steve530 · Dec 27, 2011

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.

Trebbia · Dec 30, 2011

Nice pic.

That ones a keeper.

Shows the ccv vacuum cap also.

bluebee · Dec 30, 2011

Here's that pic, shrunk to 640x480, and flipped to match Steve's excellent annotations!

lsrguy98 · Jan 10, 2014

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

bluebee · Jan 11, 2014

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)

lsrguy98 · Jan 11, 2014

All great information. I'll begin reading this morning.

Thanks!

bluebee · Jul 5, 2014

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)

Kibokojoe said:
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.

Secondary air pump (SAP

Air pump valve (APV)

Electric valve (EV)

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 leak***8230; 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***8217;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***8221; 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

bluebee · Jan 17, 2015

bluebee said:
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)

For reference, someone today has yet another broken SAS rubber vacuum hose and plastic pipe connection.
> E39 (1997 - 2003) > Is this the oil gauge?

Jakiemoon said:
And what is that little hose that broke off it. Just a vacuum hose?

lsrguy98 · Jul 7, 2014

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.

bluebee · Jul 7, 2014

lsrguy98 said:
Hoses 3 and 4 were just one hose on my 58i.

Thanks for confirming that, as it's irksome when the BMW diagrams are wrong, and helpful when people take the time to correct the information so that the rest of us stand on their shoulders.

lsrguy98 said:
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.

My hose #3 snapped right off also, so, I would recommend everyone check theirs since they are extremely brittle.

lsrguy98 said:
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

This is good to know.
It would be nice to find a good supplier of bulk metric hoses to fit the E39.

Someone might do well to make up a kit of all the hoses for the E39, as a single package.

lsrguy98 said:
By the way, the photo and diagram are very helpful so thank you for taking the time to post them.

Thanks. It's nice that you appreciate all our efforts. And thanks to you for giving back to the team useful information.

lsrguy98 · Jul 7, 2014

Photo

By the way, the photo and diagram are very helpful so thank you for taking the time to post them.

bluebee · Jan 13, 2015

There are some nice pictures of the hard to see endcaps in this thread today ...
> E39 (1997 - 2003) > Don't know what goes connected here?

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)

DHoffmeyer · Jan 13, 2015

This is really a helpful post. Thanks all!

For all to benefit, WHERE are the ends of these hoses in our beloved E39s anyway?

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