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

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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