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Thread: Vac And Boost Pipes

  1. #1
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    Default Vac And Boost Pipes

    Hi all
    Ive had trouble with lass of power on my Vectra-c 2002 2.0 dti
    Did the reading of codes and it pointed towards the vac pipes of which one that goes into a solonoid i think at the front of the car was all cracked and split on the end,The pipes are small and then the slightly larger rubber ends and also connecter is the part thats gone.
    the car is still not right and rather than go inspecting every inch of the pipes I just want to replace with say the blue silicone.
    The question is what size do I need ,ive seen some say they have fitted 2mm and someone said they had fitted 4mm also what length would I need to replace the lot?

    Lastly also wanting to replace the big boost pipes with the same blue silcone the two that run across to the turbo and the one that runs down to the intercooler I think.
    Would prefer the complete pipes not the make up version ive seen with the steel pipe,ive seen pics of someone on here fitting complete pipes.
    Thanks in advance for any help
    And any links to where I can purchase would be of great use
    Roy

  2. #2
    Regular Member dansri's Avatar
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    http://cgi.ebay.co.uk/Vectra-C-turbo...item3cb7cdb3ffdid my vac pipes with 2mm id blue silicone pipes(2003 2.2 dti), fits like a glove and i havent had limp mode since. used about 2.5 metres. ive seen the bigger pipes on fleabay in blue too.

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    Thanks for the responce dansri. do the 2mm fit direct without any connectors or anything onto the various nozzles.
    Anyone else with any outher details much appreciated

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    New Member Monkeyboy6023's Avatar
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    yes they would, but it would be a very tight fit. i used 3mm green silicone after vauxhall replaced one damaged piep, then tried to fleece me for a new EGR. glad i checked myself as there were three more breaks. now 1800 miles since the pipe change and no limp mode faults (touching wood), pulls like a champion and even a slight increase in MPG!!!!

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    well hoping 2mm will be ok as I ordered 3mtrs of that for £8 something delivered and its just the second arrived so heres hoping.
    Just the big hoes to get later but they alot more money.

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    i have a 2.2 dti im gonna chaning vac pipes to silicone soon if i get 2mm pipe is that all i need for straight swap over thanks

  7. #7
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    2mm fits nicely and infact on a couple of connections it was slightly slack but not that bad as it will leak so anything more than 2mm maybe too slack.
    Just have to see how it runs now,still seems the same standing.

  8. #8
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    i found 2mm fit realy snug not too tight and deff not loose, been on the car a good few months now.

  9. #9
    Regular Member Innes's Avatar
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    2mm is perfect.

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    2mm it is then now to just find a local supplier anyone know the size for intercooler pipes thought while im there do the lot

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