SEAT Workshop Service and Repair Manuals

Adjusting vacuum unit for turbocharger Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Adjustment tool -VW 387-, please see Correspondence → Anchor

t	Vacuum pump -VAS 6213-, see equivalent → Anchor

t	Pressure regulating valve -VAS 6342-, see equivalent → Anchor

t	Turbocharger tester -VAG 1397A-, see equivalent → Anchor

t	Gauge set -VAS 6341-, see equivalent → Anchor

t	Torque wrench 2 - 10 Nm -VAG 1783-, see equivalent → Anchor

t  Open end spanner insert (10 mm) -VAG 1783/1- l  Turbocharger removed l  Tightening torques → Chapter

–  Unplug the hose -arrow- of the pressure capsule from the turbocharger.

–  Remove the protection plate -1- on the turbocharger rod.

–  Loosen the locknut -2-.

–  Adjust the bypass valve -1- using the knurled nut -arrow- so that the valve may be rotated by hand. –  Tighten the lock nut by hand.

–  Connect the manual vacuum pump -VAS 6213-, the turbocharger tester -V.A.G 1397A- and the pressure regulator valve -VAS 6342- to the connection II -V.A.G 1397A- as shown in the diagram. –  Close the pressure regulating valve -VAS 6342- with the lever -1-.

–  Move the ring -1- of the manual vacuum pump -VAS 6213- to position -B- for „pressure“. –  Connect the turbocharger tester -V.A.G 1397A- move the switch to position II.

–  Fix the adjustment tool -VW 387- to the exhaust gas turbocharger -arrow-.   Note The values in mm refer to the read value (includes 1 mm pretension). –  Secure the dial gauge, 0-30 mm -VAS 6341/1- with the extension 30 mm -VAS 6341/3- and the flat probe -VAS 6341/4- to the universal dial gauge support -VW 387-. –  At 0 bar, tense the gauge -VAS 6341/1- to 1 mm. –  Position the indicator of the dial gauge -VAS 6341/1- at 0. –  Ensure that all of the mobile elements of the gauge move smoothly. –  Operate the hand vacuum pump -VAS 6213- until turbocharger tester -V.A.G 1397A- indicates 350 +/- 5 mbar. –  The gauge should indicate between 4.1 and 4.3 mm; otherwise rotate the knurled nut until this value is indicated. –  Tighten the lock nut by hand. –  Repeat measurement procedure. –  Lower the pressure to 0 mbar with the pressure regulating valve -VAS 6342-. –  Set the dial gauge -VAS 6341/1- to 0.   Note The following measurements should be made in sequence. In the meantime, pressure must not drop to zero. –  Operate the hand vacuum pump -VAS 6213- until turbocharger tester -V.A.G 1397A- indicates 350 +/- 5 mbar. –  Read and note the value indicated by the gauge -VAS 6341/1-. –  Operate the manual vacuum pump -VAS 6213- until the turbocharger tester -V.A.G 1397A- displays between 650 and 700 mbar. –  Vent system via pressure control valve -VAS 6342- so that pressure reading drops to 350 +/- 5 mbar. –  Read and note the value indicated by the gauge -VAS 6341/1-. –  Add values 1 and 2 together and divide by 2. –  The result (average value) must be 5 +/- 0.25 mm. –  If the result (average value) is not 5 +/- 0.25 mm, correct the adjustment, tighten the locknut by hand and repeat the measurement. –  If the result (mean value) is 5 +/- 0.25 mm, tighten the lock nut and secure with sealing paint. For sealing paint refer to → Parts catalogue.

–  Fit the protection plate -1- on the turbocharger rod.