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Stripping a turbo

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by S4_dan, Jan 18, 2014.

  1. S4_dan
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    S4_dan Fire up the Quattro!

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    Hi people.

    The turbo on my A4 whistles a fair bit and the boost is all or nothing, starts to kick in at 1800rpm and it out of puff by 2500rpm.
    I've tried the Mr Muscle trick but still the same. So tomorrow I'm hopefully going to remove my turbo. I've never opened a turbo up before but I'm mechanically minded and have rebuilt numerous engines over the years.

    If I remove the casing as per this site: VNT15-Turbo Do I need the turbo 'balancing' again or is that only if I mess about with the cartridge? I'm aiming to clean up thoroughly the vanes and check that the rod etc is all working. Otherwise it's a replacement turbo, likely from Adamss24 as he has one spare.

    But if I can salvage mine then that would make it a bit easier on my wallet! If not, then I've lost nothing but gained some parts to help towards a hybrid :)

    Dan
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  2. desertstorm
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    desertstorm Well-Known Member

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    As long as you don't touch the nuts on the end of the compressor and turbine wheels then you won't have an issue.
    Once the turbo is off it's not that hard to get apart after you have got the bolts undone. Might need a bit of a tap to split the case off just don't get carried away.
    I took my VNT17 off my previous Passat and did a how to if it's any use.

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    Karl.
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  3. S4_dan
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    S4_dan Fire up the Quattro!

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    Cheers Karl, that's a piece of mind at ease now. Will hopefully be cracking on today. Have to go to the scrap yard at 9am to get some bits for my nephews' Corsa but then home and start on the Audi.

    Cheers.
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  4. S111 NSN
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    S111 NSN New Member

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    Have you checked all of your hoses and intercoolers for leaks if your hearing your turbo whistle?
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  5. S4_dan
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    S4_dan Fire up the Quattro!

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    Yeah all seems legit. It sounds just like it did on my old man's Saab 900 turbo when his turbo used to whistle, he had the turbo recon'd and it was quiet after that.
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  6. S111 NSN
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    S111 NSN New Member

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    And i'm worried that I can't hear my turbo. But Adamss24 has waved a magic wand over it and now it's 90% all good.
    I have stripped my turbo in the passed and it is an easy job IF all the bolts undo without snapping.
    At least you will know the condition of the internals of the turbo if you do strip it down, and then if you need to replace it you will know you needed to.
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  7. S4_dan
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    S4_dan Fire up the Quattro!

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    Thats the plan. Didn't get time today though sadly. Spent much longer than anticipated at scrap yard then when we got back my wife had cooked a roast dinner for us all. Me being me consumed a bottle red alone so that rendered me unfit to remove the turbo! lol

    Two weeks is next chance I get.
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