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How Much Should The Actuator On the VNT Turbo Move..

Discussion in 'A4/S4 forum(B5 Chassis)' started by Mackers, Feb 25, 2012.

  1. Mackers
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    Mackers Member

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    as above, did an oil change today and thought i'd see how much movement i had and if it was sticking.... it was a little stiff, but not too bad i recon (cleaning the turbo with the "mister muscle mod" left for another day) and i was managing to move it about 7-9mm ish and it wasn't "wobbling" (which i been told is a good thing)... is this 7-8mm movement right??
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  2. Arrkon
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    Arrkon Midlands regional Moderator

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    My AFN diesel had about 10-15mm of "extension" when it was mullered.

    About 7-8mm was roughly what the new one had.
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  3. Mackers
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    Mackers Member

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    sounds good to me then :D
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  4. PAULF
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    PAULF Active Member

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    If you have a look, you will see a screw stop for the actuator.
    The actuator should move to the stop.
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  5. Lion Garage
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    Lion Garage New Member

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    Best way to test is with a VAC pump (I use a Mityvac) Draw vac on the actuator then find a way of pushing/pulling the lever to see if it has reached its max (should be a reasonably solid feel if it has) and wont push further. Then release the vac and check the lever returns quickly and smothly back to the min stop in the same way. If its sticky at either end and doesn't easily and smothly move to the limit stop you have issues brewing.

    HTH
    Steve.
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