A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Read and make a not of the value on Dial Indicator (VAS 6341/1).
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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 460 +/- 5 mbar using the Pressure Control Valve (VAS 6342).
‹› If 460 +/- 5 mbar is not reached, then the measuring must be started again from the beginning.
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Read and make a not of the value on Dial Indicator (VAS 6341/1).
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Add value 1 and 2 and divide by 2.
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The result (mean value) must be 5 +/- 0.5 mm.
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If the value is greater, then lower the pressure to 0 bar, loosen the nut - 1 - and turn the nut - 2 - a half a turn and then tighten the nut - 1 -
hand-tight.
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Set the Dial Gauge (VAS 6341/1) to 1 mm pretension.
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Turn the Dial Gauge (VAS 6341/1) display to 0 and repeat the measurement.
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If the average value is 5 +/- 0.5 mm, then tighten the lock nut and repeat the measurement.
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If the average value is 5 +/- 0.5 mm, then secure the nuts with sealing wax.
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Secure the new securing plate - 1 - over vacuum diaphragm linkage.
