10-20-2018, 10:39 AM
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#1
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Crib
Join Date: May 2015
Location: Stockholm, Sweden
Posts: 80
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What is this tube?
Hi all,
After having gone through the tedious task of removing my alternator I found this cracked tube behind it.
It is placed directly behind the alternator. The picture is taken from inside the car with the inspection hatch removed.
The inside of the tube has some light oil remains.
Is it something for the AOS?
Thanks in advance guys 
/Crib
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10-20-2018, 11:22 AM
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#2
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Registered User
Join Date: Apr 2010
Location: Canada
Posts: 3,121
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ves, vents the head on opposite side of the engine over to the aos. part # 996.107.147.55
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10-20-2018, 11:39 AM
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#3
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Crib
Join Date: May 2015
Location: Stockholm, Sweden
Posts: 80
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Aha. thanks.
Is this the same as the vacuum air filler tube? Meaning it cannot/should not be fixed with heat resistant tape, but rather fully replaced?
/Crib
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10-20-2018, 12:32 PM
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#4
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Registered User
Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
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Man I don't ever doubt what TRK says but in this case, well that is over bank 1 and looks to just be wire loom cover to me. is there a split on it lengthwise and wires in it? The part TRK is referring to goes to the PCV on bank 2.
Last edited by 911monty; 10-20-2018 at 12:45 PM.
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10-20-2018, 05:35 PM
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#5
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
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No, TRK is right. Should be replaced.
__________________
James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow! 
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
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10-21-2018, 03:53 AM
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#6
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 2,920
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Quote:
Originally Posted by NewArt
No, TRK is right. Should be replaced.
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Part # 996.107.147.55 looks zero like that illustrated in the picture. TRK always is spot on, but this isn't meeting the acid test. Are you suggesting that the part in the OP illustration was wrapped with wire loom, because it looks like there's a fairly lengthy run of loom. If you run the part number, it appears at the bend there is maybe 4 inches of the loom-look. The OP illustration looks zero like that.
Someone else have an idea/recommmendation? Maybe OP can share what lurks beneath the loom. Wire? Hard plastic pipe?
__________________
1998 Porsche Boxster
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10-21-2018, 08:10 AM
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#7
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Registered User
Join Date: Jun 2017
Location: Georgia
Posts: 36
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This is not a "tube" it is simply a wire harness with cracked covering. leave it alone.
__________________
Joe K. Peachtree City GA
2001 986 Boxster S, Silver with black interior.
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10-21-2018, 11:34 AM
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#8
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Crib
Join Date: May 2015
Location: Stockholm, Sweden
Posts: 80
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Hm..
It's certainly not a wire loom. Even though the surface resembles one of those, this one does not contain any wires and the inside of the tube is oily.
My own bet based on previous posts is, that it is the ventilation for the AOS.
I'm wondering if a previous owner took some other kind of piping to replace it. If so I need to investigate the connecting ends of it.
Anyhow, that's life. Almost done with a job, and a new one appears 
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10-21-2018, 12:07 PM
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#9
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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That is where the AOS breather hose passes behind the alternator, but mine is solid in that section (not ridged).
Where it passes through that section is about where the number "4" is on this diagram. Trace it back to its source to be sure.
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10-21-2018, 01:10 PM
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#10
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Artist, 986S tinkerer
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,821
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I am not guessing here. If you watch my YouTube video https://youtu.be/7OLakpX6Yj8 at around 7:30 you will see this part which I had to replace.
__________________
James now has: 2008 987S 6 speed
Crashed: 2010 987.2 pdk in speed yellow!
Sold to a cool racer chick: 2004 986 S
YouTube channel: the PORSCHE as seen by NewArt
www.youtube.com/channel/UCohdrH2xHTklM1thxk0KKOQ?
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10-21-2018, 01:25 PM
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#11
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1997 Tip, 2018 Macan
Join Date: Aug 2015
Location: Upland, CA
Posts: 1,338
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No wires inside = vacuum. The other way to tell wire loom versus vacuum lines is loom is "usually" split completely along it's length.
Last edited by rexcramer; 10-21-2018 at 02:00 PM.
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10-21-2018, 02:16 PM
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#12
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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Quote:
Originally Posted by NewArt
I am not guessing here. If you watch my YouTube video https://youtu.be/7OLakpX6Yj8 at around 7:30 you will see this part which I had to replace. |
That's definitely the AOS hose, then. I guess they switched to a fully ridged "flexible" type line at some point. Mine is definitely smooth through most of it.
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