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Front mount intercooler n75 pipe

Discussion in 'A3/S3 Forum (8L Chassis)' started by Dm90, Mar 17, 2013.

  1. Dm90
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    Dm90 New Member

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    [Mar 17, 2013]
    Hi there. Fitted my new front mount yesterday but having a bit of a problem with the pipe work for the n75. On the kit I have there is only one pipe to replace the two old ones. It's the biggest of the two that's there. What should I do with the smaller of the two pipes? Does it get blanked of? Bit confused with it really.

    Any help would be much appreciated.


    Cheers, Dave.
    #1
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  3. jay1601
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    jay1601 Well-Known Member

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    [Mar 17, 2013]
    does the pipe look like this your talking about ?
    [​IMG]

    if so the little pipe goes to the N75 valve
    the bigger pipe goes to the dump valve

    [​IMG]
    #2
  4. Dm90
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    Dm90 New Member

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    [Mar 17, 2013]
    Aye, my pipe is the same as the top picture but mine does not have the smaller pipe coming out of it. Do you know where I could get one of them?
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  5. jay1601
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    jay1601 Well-Known Member

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    [Mar 17, 2013]
    your have to get one welded in, or tap a thread and liquid weld one in.
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  6. Dm90
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    Dm90 New Member

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    [Mar 17, 2013]
    Ah bugger. By liquid weld do you mean chemical metal or something similar? Don't suppose you know where I could get one of the small pipes to fit to mine? Also is it still ok to drive as it is?
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  7. phil miller
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    phil miller Member

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    [Mar 17, 2013]
    Welding is ok but you will need to smoke test it to make sure it doesnt weep boost, best way is chemical metal, a tube is around the £8 mark, i welded both of mine (n75 and DV) and both have weeps, ive got some chem metal so will put that on asap

    as for a N75 take off pipe, i cut the take off, off my old pipe and drilled a hole in the new FM charge pipe then welded the take off on, bust way as its the correct size dude :)
    #6
  8. A3-Lee
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    A3-Lee Active Member

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    [Mar 17, 2013]
    I used a metal tyre valve bolted on the boost pipe then chemical metalled round it been fine for about 18 months
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  9. Dm90
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    Dm90 New Member

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    [Mar 17, 2013]
    Thanks for the replies no where open to get any now so will have to wait till tomorrow. Do you know if its still ok to drive without that pipe on?
    #8
  10. A3-Lee
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    A3-Lee Active Member

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    [Mar 17, 2013]
    The actuator will get no vac supply so not really mate
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  11. Dm90
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    Dm90 New Member

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    [Mar 17, 2013]
    Ok thanks il just leave it till the morn then. Hopefully get it sorted tomorrow.

    Is it not possible to buy a pipe with it already fitted? Seems pretty stupid selling an intercooler kit that u then have to go an weld bits to for it to fit lol
    #10
  12. Dm90
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    Dm90 New Member

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    [Mar 18, 2013]
    Managed to get a pipe chemical metalled on today and put everything back together and then fired it up and took it for a drive. Engine runs fine but won't boost. Only Gets 2 maybe 3 psi. Also a very deep loud throaty noise accelerating.

    anybody know what this could be? Pretty puzzled to be honest :s
    #11
  13. jay1601
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    jay1601 Well-Known Member

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    [Mar 18, 2013]
    big boost leak ?

    didn't put the N75 back correctly ?
    #12
  14. Dm90
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    Dm90 New Member

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    [Mar 18, 2013]
    Aye one of the pipes had popped off. Never noticed it.

    Cheers
    #13

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