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Turbo - need some help (2.0 TDI)

Lion Heart Oct 4, 2018

  1. Lion Heart

    Lion Heart Member

    Hi guys!

    Hoping you can help as need a little!!

    Having some rough idling issues, especially noticeable when revving between 1,000 and 2,000 RPM's (stationary for testing).

    I've had a look at the Turbo, more specifically the actuator that sits on top, and the arm (piston) that pushes downward from underneath.

    So I got under the car and got my partner to rev the engine so I could watch what was happening. Basically the actuator arm is locked in the full downward position. Whilst the engine is running I cannot manually push it back up. With the engine off I can push it up manually.

    I tried the test where you shoot a bit of air from a compressor into the actuator to see ifthe arm moved, it didn't move at all.

    When revving HIGHER 9nearing red line) the arm moves a little bit. You can also see when revving lower that there is pressure where the end of that arm bolts on to the arm to the turbo as you can see the pressure release as the arm relaxes, but the arm does not actually move (unless higher revs and then only a little bit).

    What is confusing me is in the YouTube video's I found it seems that the 'normal' state is the actuator arm in the up position, and when activated it pushes down. But mine is locked down if that makes sense.

    Is it meant to move up or down on the 2.0 TDI?

    And any clues to what might be happening with mine??

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