Replacing vacuum hoses on 1.8T
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  1. #1
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    Replacing vacuum hoses on 1.8T

    I found DIYs for replacing vacuum hoses on V6 but couldn't find one for 1.8T.

    • Is there any DIY for 1.8T?

    • And from where can I buy the colorful silicone vacuum hoses?

    TIA as always.

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  3. #2
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    There are 4 hoses on a b5.5 one from the dv to n249 valve and than one from the n249 valve to the intake manifold. Than there is one from underneath the intake manifold to the egr valve and for the life of me I can't remember the 4th but there is a few good DIY in the b6 and b6 a4 sections


    Ps the n249 valve is underneath the intake manifold also.

  4. #3
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    I have replaced three of them, and the fourth (DV) needs replacing. If you use silicone, make sure it is high temperature rated, particularly for the longer runs.

  5. #4
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    Thanks!
    What is the best place to buy the colorful silicone hoses?

  6. #5
    Motel Room Moderator VAGguy's Avatar
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    Silicone Vacuum & Heater Hose : HoseTechniques Silicone Turbo Hose, Buy Direct from Manufacturer, Best Quality / Best Price - Hose Techniques established 1983 - Quality, Performance, Style

    4 hoses.
    Intake to n249 valve.
    n249 valve to dv
    Intake to fpr
    Valve under intake to combi valve.
    Basically any 3.5mm hose you find

  7. #6
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    COOL! Thanks VAGguy.
    Unfortunately blue and red kits are out of stock here. Any other places to buy?

  8. #7
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    Spoke to their agent, they have red ones available so I will buy those.
    Does anyone know the lengths of these four hoses?

  9. #8
    Motel Room Moderator VAGguy's Avatar
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    6" for the fpr.
    1.5' for the combi
    8" for the intake to n249
    3' for the dv to n249

    lengths approximate

    plan on 7-8ft

  10. #9
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    Correct me if I'm wrong but isn't there one from the n249 to a vacuum reservoir also?

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    Motel Room Moderator VAGguy's Avatar
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    Least likely to go bad, but yes. Usually the check valve or t fitting under the Mani breaks before that line goes bad. 6" more then. I thought I tried to cover it with saying any 3.5mm hose.

  12. #11
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    Quote Originally Posted by VAGguy View Post
    Least likely to go bad, but yes. Usually the check valve or t fitting under the Mani breaks before that line goes bad. 6" more then. I thought I tried to cover it with saying any 3.5mm hose.
    Yes I did break and replace the T fitting under the mani. And that little 6" hose had a hole in it because overtime it had collapsed and it was touching the coolant pipe that was underneath it. Temporarily I am using a regular vac hose there.

    I found a 10' blue silicone hose at eBay. There is no other place online where blue hoses are available (incl. Amazon)

    http://cgi.ebay.com/ebaymotors/3-5mm...item56443e3dcd

    Do you think this would work?

  13. #12
    Motel Room Moderator VAGguy's Avatar
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    never saw a disclaimer like that before. "not comatible with fuel or oil"

    You know what has worked beautifully the last 7 years and 120K for me? The stock upgraded hoses used from 2003+. Not one speck of deterioration.

  14. #13
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    Quote Originally Posted by VAGguy View Post
    never saw a disclaimer like that before. "not comatible with fuel or oil"

    You know what has worked beautifully the last 7 years and 120K for me? The stock upgraded hoses used from 2003+. Not one speck of deterioration.
    Silicone hoses are not compatible with fuel and oil because they will "melt" Every website I've seen has a disclaimer warning people about this

  15. #14
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    ^^Correct. VAGguy, this disclaimer is on the link you provided as well.

    Stealer is overcharging like crazy for these hoses, some of them are $50 and more. Ridiculous.

    So I am going to order these from eBay.

  16. #15
    Motel Room Moderator VAGguy's Avatar
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    Eh, I'd still get the stock ones. Call Impex. They might hook you up. I get parts from them all the time. Honestly, never bought silicone so I never saw a disclaimer.

  17. #16
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    Quote Originally Posted by MOC View Post
    this is sooooo gay Passats are gay as is straight from the dealer and you want to add colorful hoses under the hood? nobody is going to notice your colorful fruitcake hoses only other passat owners
    Needs to be banned if this is his attitude. Especially after whining: http://www.passatworld.com/forums/70...ml#post2803414

  18. #17
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    Quote Originally Posted by MOC View Post
    this is sooooo gay Passats are gay as is straight from the dealer and you want to add colorful hoses under the hood? nobody is going to notice your colorful fruitcake hoses only other passat owners

    you give us floridians a bad name with that style. we don't put colorful hoses under our passat hoods. that is done in the west around SF
    Ha ha ha. So you are back Victim.

  19. #18
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    I bought 3.5 x 2mm silicone hose (in a nice blue, no less) from ECS Tuning for my 01.5 AWM. The only downside is they sell precut lengths of 1, 3, or 15 feet, so you end up with some extra.

    A question: my N249 to DV hose is quite a bit bigger than the other three that always fail, so I haven't replaced it yet. I'm afraid to take it off if its as hard as the others...

    Does anyone know the size for the N249 to DV hose? Or is my 01.5 just special?

  20. #19
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    I received my 10' hose from eBay.

    It is a bit scuffed from outside and not as smooth as shown in the pictures. It's as if it was stored badly and hence got scratches on the outside and lost it's gloss.

    1) Is that normal?

    2) Fresco, did you get yours from ECS?

    3) If so, what is the quality? Is it smooth on the outside?

  21. #20
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    it'd be awesome if one of you who are about to do this created a DIY for the 1.8t!!


  22. #21
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    Quote Originally Posted by godsspeed View Post
    it'd be awesome if one of you who are about to do this created a DIY for the 1.8t!!

    What he said.

  23. #22
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    Ok, I will do it.

  24. #23
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    mikefl,
    Yes, I got my hose from ECS, 3.5 x 2 mm. I got blue, but black is the same price. Volkswagen Passat B5 FWD 1.8T > General Purpose > Hose > Vacuum Hose > ES#250201 Blue Silicon Vacuum Hose (3.5x2) 3 Foot - 51731257971BLU-3
    It is nice and smooth on the outside, came sealed in a plastic bag. The downside is that ECS only sells precut 1, 3, & 15 foot lengths.

    I bought two 3 foot lengths, which was plenty to do the three hoses. As mentioned above, my N249-to-DV hose is a larger outside diameter than the rest, so I haven't replaced it yet. It still feels flexible, but I'm afraid to disconnect it to measure! The other three hoses cracked like plaster when squeezed.

  25. #24
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    THANKS for the info Fresco.

    Mine was a single 10' piece stuffed in a small box, no plastic wrapping on it, etc. Has lots of scuff marks and no gloss.

    So I will have to return it.

    There is no point in getting the shiny blue hose for aesthetics if it is scuffed and looks old before its installed.

    Did you install it already? It would be GREAT if you would post some pics of how they look once installed.

  26. #25
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    My wife is wondering why I've been planted in front of the computer...

    I wrote up a DIY on the vacuum hoses and posted it under a new thread, since this one is getting a little long. We'll see if it passes muster for the info base...

    The DIY is at:
    http://www.passatworld.com/forums/42...uum-hoses.html

  27. #26
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    Fresco, THANK YOU, THANK YOU, THANK YOU. Its a very well written DIY and the pics make it very clear. I vote for it in the info base.

  28. #27
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    Any ideas how different this would be on the later year AWMs? I haven't looked under my hood to compare yet, but IIRC it looks like these vacuum lines may be the same.

  29. #28
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    Quote Originally Posted by nolesfan View Post
    Any ideas how different this would be on the later year AWMs? I haven't looked under my hood to compare yet, but IIRC it looks like these vacuum lines may be the same.
    I'm pretty sure the vacuum lines are the same between the two. The difference is in the breather system.

  30. #29
    Motel Room Moderator VAGguy's Avatar
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    Quote Originally Posted by woodardhsd View Post
    I'm pretty sure the vacuum lines are the same between the two. The difference is in the breather system.
    correct

  31. #30
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    Have to do this myself tomorrow. Trying to clear up a p0411 CEL :|

    Hoping the damn SAIP isnt bad

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