Vacuum hose leak and Engine Compartment

[Hal88]

Originally Posted by Comanche

J.Seven, If you are referring to the hose with what looks like a donut hole in the end of the hose, then yes. Both of my hoses look as if they have melted, collapsed and are gummy. I am not sure if they are the cause of my System Too Lean on Bank 1 and Bank 2 fault code, but nevertheless I will go ahead and replace using the information that JP99 provided. If that does not resolve the fault codes issue then I will check for vacuum leaks at the intake manifold, valve cover, MAF gaskets and any other hoses that I can find. I read a thread that said worn spark plugs could be a possible problem for Fuel System Too Lean. Any thoughts????

Thanks everyone for the help, I hope each of you are blessed with an additional 100K of worry free driving!
Comanche

According to another thread, this guy had those codes and when he replaced the hoses the codes disappeared.....change them and see what happens, they are not expensive.

[J.Seven]

Originally Posted by Comanche

J.Seven, If you are referring to the hose with what looks like a donut hole in the end of the hose, then yes.

Yes I was refereing to that pipe. I have that hole in the pipe at least for 2 months and haven´t any light on the dash yet. This week I´ll put a new pipe put it on.

[Carrerax]

Hi all, Well, It looks lie my X5 has the same 2 collapsed hoses. I just had the engine cover off to change the plugs and saw it. It doesnt like to idle at startup and Im guessing this is why. Anyway, I read this whole thread and cant find the part numbers for these 2 hoses. I can see them on the Real oem link either. Mine is a 03/01 build 2001 4.4. Does anyone have the part numbers? Thankks in advance!

[noncom23]

http://www.realoem.com/bmw/showparts...17&hg=11&fg=15
Not sure, do not know your edition. Part 5.

Originally Posted by Carrerax

Hi all, Well, It looks lie my X5 has the same 2 collapsed hoses. I just had the engine cover off to change the plugs and saw it. It doesnt like to idle at startup and Im guessing this is why. Anyway, I read this whole thread and cant find the part numbers for these 2 hoses. I can see them on the Real oem link either. Mine is a 03/01 build 2001 4.4. Does anyone have the part numbers? Thankks in advance!

[Carrerax]

Thanks!

[Greg]

The hoses you are all referring to are the oil separator hoses. I have the part numbers. BMW part# 111575568838 and # 111575568837. The stealer wanted $43.83 each. I found them at Discount Auto Parts – Mercedes Parts, BMW Parts, Volvo Parts, Volkswagen Parts – PartsGeek.com for $17.95 and $21.95. There part numbers are W0133-1665437 and W0133-1665437.

I too had codes P1159 nad P1161 on my Actron. I also had to replace my MAF, which is probably not a bad thing to do since I have an 01 4.4L. Little things are starting to nickle and dime me. Now the Self-Leveling Suspension and Air Bag lights are on.

Looks as if the hoses will be challenging to replace, but I am sure with everyone's help I can get it done.

[Greg]

I replaced my hoses. Not too bad. A little rough on the back. Passed my Emissions test. Drove nearly 150 miles now and still no codes showing up. Thanks!!!!!!!!!!!!!!!!!!!!:thumb up:

[mysweetx5]

[QUOTE=jp99;187754]Quote:
Originally Posted by ThrasherFan
Seba/JP99,

I've got the same 2 crankcase vent hoses at the back of the engine on my 4.4 that have deteriorated and causing Mixture Control faults. Did you replace these on your own? If so, could you share how you were able to access these hoses for removal and replacement?

Thanx!

I also experienced two faulty codes on my 2001 X5 4.4i and I never knew if these hoses in the back of the engine could have been the cause. After several other tests: cleaning (Air mass sensor, checking some other vacuum for leakage and replacing all 4 O2 sensors, but still having those two ignoring codes alone: P0171/P0174 and unable to detect where this leak is coming from.

Now, as I look @ those hoses behind the engine, one of them which is the big one seems to be pretty muggy, slightly melted flat. Now I'm very focusing on replacing them and the fuel filter gas as they might be the issue for those two codes (P0171/P0174) wish someone would post a few pic on how to access behind the engine @ those hoses.


The center plastic component just above those hoses comes off - it holds the pollen filter and, at firewall, fits into two ventilation ports. Once off, you have ready access to the back end of those rotten hoses.

1. Pull the long rubber gasket that seals the area - runs parallel to the firewall the width of the engine compartment.
2. Pull rain catchers (or whatever they are) on each side of the pollen filter area - pull straight up - each is about the size of your hand - they are snap-in, vertically.
3. Locate large nut that holds your battery positive cable in place - locate similar nut on the other side of the engine - that one does not appear to hold anything. Remove nuts, pull the plastic housing straight back off the bolts and lift out. Bolts will stay in place. That center housing, with pollen filter on top, comes out as one large piece - note how it fits back in at the firewall.
4. You should have easy access to the back ends of those hoses. In my case, the back ends had standard BMW hose clamps while the front, top ends had crimped clamps. The crimped ones come off readily with a screw driver to pry at the crimp point or, better, pry the wrapped part of the clamp up and back.
5. Replace hoses, reverse assembly procedure. I bought the two hoses at local dealer and got, also, two clamps to replace the crimped ones.

Ran quieter and smoother, took care of P1159 and P1161 fault codes. The replacement hoses are modified from the original but the parts guy had no idea if they were any better. I doubt it - looks like something that needs to be done every 4 or 5 years.

Good luck - post back if you have a problem. Fun project.

[jp99]

No pics taken - none needed. Read and follow the instructions at the bottom of your post - else scan for all posts by 'jp99' as I did a fuller post on this several years ago.

It's a common problem on that year - possibly other years - of the X5.

[mysweetx5]

[QUOTE=Greg;598190]I replaced my hoses. Not too bad. A little rough on the back. Passed my Emissions test. Drove nearly 150 miles now and still no codes showing up. Thanks!!!!!!!!!!!!!!!!!!!!:thumb up::thumbup

Hey Greg!!!
I'm very happy with your outcome result for the car. This is exactly how I would hope for my 2001 X5 4.4i to pass through state inspection no problem. But thinks God! with connecticut law, I was able to get the car registered and still got licence plate for 2yrs there even after my car has failed emission test.

But I'm required to fix this issue before two months, otherwise they will not renew my inspection for 2012. And I'm still getting those ignoring codesP0171/P0174) Clearing them will come back more often now, even after several other test for vacuum leaks( cleaning air mass sensor, replacing all O2 sensors, no luck yet codes still around. Now I'm looking forward to replace those hoses in the back of the engine as they appears to be a little bit (muggy and melted)