TURBOCHARGER VACUUM DIAPHRAGM, ADJUSTING, 1.8L ENGINE ONLY (Turbocharger Removed): Adjusting

WARNING: This page is about a different car, the 2016 Audi Q3 Quattro, 2016 Audi Q3, 2015 Audi Q3 Quattro, and 2015 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

It is necessary to adjust the diaphragm only if it has been removed.

-- Pre-adjust bypass flap -1- via nut -arrow- so flap can still just be turned by hand.

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-- Secure the :VW387 onto the turbocharger -arrow-.

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NOTE:

The mm specifications apply to the value read out (includes 1 mm pre-load).

The : VAS6341/1 with : VAS6341/3 must align with the linkage on the vacuum diaphragm.

-- Secure the : VAS6341/1 with the : VAS6341/3 and : VAS6341/4 to the :VW387 .

-- Set the : VAS6341/1 to 1 mm pretension.

-- Turn the : VAS6341/1 display to 0.

-- Check dial gauge for ease of movement.

-- Turn the nut -1- approximately seven turns in the direction of the -arrow-.

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-- Turn the nut -2- in the direction of -arrow- until the dial gauge shows 7 mm.

-- Hand-tighten the nut -1-.

-- Set the : VAS6341/1 to 1 mm pretension.

-- Turn the : VAS6341/1 display to 0.

-- Connect the : VAS6213 , the : VAG1397A to connection II and the : VAS6342 as shown in illustration.

-- Switch the : VAG1397A and set the slide switch to position II.

-- Close the : VAS6342 on the lever -1-.

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-- Set the slide ring -1- on the : VAS6213 in position -B- for "pressure".

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NOTE:

The following measurements must be performed in one sequence. In the meantime, pressure must not dissipate to 0.

-- Operate the : VAS6213 until the : VAG1397A displays 460 mbar (6.7 psi) +/- 5 mbar (0.07 psi).

NOTE:

If 460 mbar (6.7 psi) +/- 5 mbar (0.07 psi) is exceeded, then the measuring must be started again from the beginning.

-- Read and note the value on the : VAS6341/1 .

-- Operate the : VAS6213 until the : VAG1397A displays 650 mbar (9.4 psi) to 700 mbar (10.2 psi).

-- Reduce the pressure to 460 mbar (6.7 psi) +/- 5 mbar (0.07 psi) via : VAS6342 .

NOTE:

If 460 mbar (6.7 psi) +/- 5 mbar (0.07 psi) is not reached, then the measuring must be started again from the beginning.

-- Read and note the value on the : VAS6341/1 .

-- Add value 1 and 2 together and divide by two.

-- The result (mean value) must be 5 +/- 0.5 mm.

-- If the value is greater, then lower the pressure to 0 bar (0 psi), 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 : VAS6341/1 to 1 mm pretension.

-- Turn the : VAS6341/1 display to 0 and repeat the measurement.

-- If the average value is 5 ± 0.5 mm, then tighten the lock nut and repeat the measurement.

-- If the average value is 5 ± 0.5 mm, then secure the nuts with sealing wax. Sealing wax. Refer to the parts information.

-- Secure the new securing plate -1- over vacuum diaphragm linkage.

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