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    Thread: Verna 1.5L VGT - Turbo Dissection

    1. #1
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      Verna 1.5L VGT - Turbo Dissection

      Had the VGT dissected for heat coating the turbo manifold at 63,000 kms. Below is with the exhaust manifold

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      Took this as a chance to clean the internals of diesel soot.
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    2. #2
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      The mechanic himself was hesitant to open the turbo since he had not done it before. It takes guts to open a working VGT turbo by self considering the cost of the turbo (Rs: 60,000) & the precision vane mechanism inside like a Swiss watch.

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      The turbo shaft end fastening nuts were not fiddled with. Turbos are balanced >= 2,00,000 rpm hence if the center shaft nuts are removed & re-tightened it will upset the balancing of the turbo. Local re-balancing often does not give the factory precision & reliability.

      The turbo in the Verna is comparatively a bigger size Compressor A/R = 0.88 when the Enigne's 1500cc is considered. It is a sign Hyundai wanted to carve a niche in the diesel performance in the medium car segment with this model.
      Last edited by eapen; 23rd Apr 2013 at 11:44.
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    3. #3
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      I was expecting the width of VGT vanes to be of > 1cm in size. On removing the vane assembly did I realise that the vane width is < 4mm & the width of the circular outlet air passage channel through which air flows past the vanes pushing the turbine wheel is slightly < 5mm

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      Last edited by eapen; 23rd Apr 2013 at 11:58.
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    4. #4
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      Shot blasted at an industrial shed & cleaned the turbine housing.

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      If you observe there is small pitting inside the housing due to the shotblasting - this does not affect the performance of the turbo.
      Last edited by eapen; 23rd Apr 2013 at 12:04.
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    5. #5

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      Waiting for an update

      Lots of guts are required to open a turbo , that too a working one .

      now if anything goes wrong with the turbo , i know the guy to chase !
      Last edited by Notorious; 23rd Apr 2013 at 12:06.

    6. #6

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      Wow ...... awesome work ... looking forward for updates regarding relaibility and difference in performance if any after this escapade

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      eapen: great work. looking forward to updates
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      #eapen are the vanes electrically controlled this turbo?

    9. #9
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      The outside housing of the turbo is where the Techline heat coating is being done. The turbo is an original Garrett as evident from the first picture. Turbine A/R = 0.42 . Don't know how successful this coating would be because when I did the exhaust manifold first time the heat coating marginally wore off within 6 months.

      Turbo housing
      Before
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      After
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      Last edited by eapen; 23rd Apr 2013 at 12:50.
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    10. #10

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      Where did you get this done Eapen? Love to join you sometime in your experiments
      Last edited by k a s h; 23rd Apr 2013 at 12:48.

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