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Vacuum pipe size

Discussion in 'A4/S4 forum(B5 Chassis)' started by tara_nta, Dec 10, 2012.

  1. tara_nta
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    tara_nta Member

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    [Dec 10, 2012]
    Hi, maybe a silly question but im going to replace all the vac lines on my 1999 tdi engine, what size pipe do i need? 3mm or 5mm?
    thanks in advance
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  3. tara_nta
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    tara_nta Member

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  4. NineNails
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    NineNails Proud sponsor of the snack food industry

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    [Dec 11, 2012]
    Vac lines are usually 3mm internal diameter. I say usually because I don't know bugger all abut TDI's mate tbh
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  5. tara_nta
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    tara_nta Member

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    [Dec 13, 2012]
    Lol ok thanks mate
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  6. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    [Dec 13, 2012]
    3mm as you can force fit them for a secure fit, dont no about TDI's though as i hate diesel's lol but on mine its 3mm but my forge dv nipple is more 5mm so i just rammed it on fiddly but worked.
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