TT Roadster L4-2.0L Turbo (BPY) (2008)
‹› The mm specifications apply to the value read out (includes 1 mm pre-load).
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Secure Dial Gauge 0-30 mm (VAS 6341/1) with Dial Gauge Extension, 30 mm (VAS 6341/3) and Flat Pickup (VAS 6341/4) to Dial Gauge
Holder (VW 387).
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Set Dial Gauge 0-30 mm (VAS 6341/1) to 1 mm tension at 0 bar.
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Rotate Dial Gauge 0-30 mm (VAS 6341/1) display to 0.
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Check dial gauge for ease of movement.
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Operate Hand Vacuum Pump (VAS 6213) until Turbocharger Tester (V.A.G 1397A) shows 350 +/- 5 mbar.
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Dial gauge must display between 4.1 mm and 4.33, otherwise, turn knurled nut until value is displayed.
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Hand tighten lock nut.
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Repeat measurement.
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Reduce pressure to 0 mbar via Pressure Control Valve (VAS 6342).
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Set Dial Gauge 0-30 mm (VAS 6341/1) to 0.
‹› The following measurements must be performed in one sequence. In the meantime, pressure must not dissipate to 0.
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Operate Hand Vacuum Pump (VAS 6213) until Turbocharger Tester (V.A.G 1397A) shows 350 +/- 5 mbar.
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Read value on dial indicator (VAS 6341/1) and note.
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Operate Hand Vacuum Pump (VAS 6213) until Turbocharger Tester (V.A.G 1397A) displays 650 mbar to 700 mbar.
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Reduce pressure to 350 +/- 5 mbar via Pressure Control Valve (VAS 6342).
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Read value on dial indicator (VAS 6341/1) and note.
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Add value 1 and 2 and divide by 2.
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The result (mean value) must be 5 +/- 0.25 mm.