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Old 09-09-2012, 08:02 AM   #1
Tament
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Join Date: Sep 2012
Location: South Florida
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My Ride: 2001 330I
Mysterious Hose - Help find where it goes

Resolved - I have a hose coming from a unit that goes somewhere behind the engine, up against the firewall. The hose was so brittle that as soon as i held it, it broke, when I started tracing it, it broke from the other end and I could not tell what it was attached to. See the attached Pic, the hose is connected to that unit on the passenger side from of the car (2001 330i 4 dr).

What is that unit
Where does the other end of that black tube attached to (the small tube to the right)
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Last edited by Tament; 09-14-2012 at 08:20 AM.
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Old 09-09-2012, 08:04 AM   #2
jfoj
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See the first link below in my signature and look at the section on the SAP.

It should give you most of the info you need.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 09-09-2012, 08:20 AM   #3
dmax
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Easiest is to remove cabin air filter housing, engine cover...and replace that hose as one continuous hose...at least that's what many have done, I did it myself and none the worse for it that I can tell. Use inspection mirror...you'll find that hose sticking into a port on the back of the intake manifold...the port points to the passenger side.
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Old 09-09-2012, 10:48 AM   #4
awszach
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same thing happend to me a couple weeks ago when i did my valve cover gasket, luckily i had a piece laying around that fit it, i didnt know what it was either
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Old 09-09-2012, 04:55 PM   #5
Tament
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Thanks all, I replaced the entire thing with a tube, I had to buy a mirror, it was easy as 1,2,3....thanks for sending me the instructions JFOJ, I actually used to live Fairfax, went GMU, wished I had not moved, loved the area.
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Old 09-09-2012, 07:08 PM   #6
jayb328i
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Is that the Air Pump. I am assuming it is not a fuel line hose, since you would smell it if it was that. Looks like the Air Pump, which has a thick hose on one side about 8inches long and a rather thin hose on the other side that snakes around the engine and fire wall. It is a vacuum hose if it goes to the Air Pump and should trigger a fault code indicating Air Pump is bad (not the case, its the hose). I know because I just had this happen to the thick hose and changed it.
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Old 09-09-2012, 09:19 PM   #7
awszach
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Nice! I was born and raised in fairfax, actually bought my 323 in fairfax and visited gmu, got a hoodie when I was there, I might considere coming back for a concert in December
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