CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
The linkage -A- should start to move at a pressure of approx.
300 mbar and be at its limit stop at a pressure of approx.
700 mbar.
The stroke of the rod is approx. 10 mm.
Note
If no pressure can be built up using hand vacuum pump - VAS
6213- , or if the pressure drops immediately again, check hand
vacuum pump - VAS 6213- and connecting hoses for leaks. If no
fault is found: renew vacuum unit ⇒ page 443 .
1.5
Adjusting turbocharger vacuum unit (en‐
gine codes BZB, CGYA, CDAA, CDAB)
Note
This procedure is used only to adjust the vacuum unit. When
checking adjusted vacuum units the values may differ.
Special tools and workshop
equipment required
1. Exhaust turbocharger
439
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
♦ Universal dial gauge holder - VW 387-
♦ Hand operated vacuum pump - VAS 6213-
♦ Pressure regulating valve - VAS 6342-
♦ Turbocharger tester - V.A.G 1397A-
♦ Dial gauge set, 4-part - VAS 6341-
♦ Torque wrench - V.A.G 1783-
♦ Open-end spanner insert AF 10 - V.A.G 1783/1-
Note
♦ Non-adjustable vacuum units are fitted in some vehicles.
♦ The vacuum unit must be adjusted only if the linkage has been
loosened.
♦ Adjustment is carried out when turbocharger is removed.
– Pull hose -arrow- from vacuum unit on turbocharger.
– Detach locking plate above turbocharger linkage.
– Loosen lock nut -2-.
440
Rep. gr.21 - Turbocharging/supercharging
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
– Pre-adjust bypass flap -1- above rod of vacuum unit -arrow-,
so that the bypass flap can just be turned by hand.
– Tighten lock nut hand-tight.
– Connect up hand-operated vacuum pump - VAS 6213- , tur‐
bocharger tester - V.A.G 1397A- (connection II) and pressure
control valve - VAS 6342- as shown in illustration.
– Close pressure control valve - VAS 6342- at lever -1-.
– Move slide ring -1- on hand vacuum pump - VAS 6213- to po‐
sition -B- for “pressure”.
– Switch on turbocharger tester - V.A.G 1397A- and set sliding
switch to position II.
1. Exhaust turbocharger
441
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
– Secure universal dial gauge bracket - VW 387- to turbocharger
-arrows-.
– Secure dial gauge - VAS 6341/1- with dial gauge extension,
30 mm - VAS 6341/3- and flat pickup - VAS 6341/4- to uni‐
versal dial gauge bracket - VW 387- .
– With pressure at 0 bar, set dial gauge - VAS 6341/1- to 1 mm
preload.
– Turn dial of dial gauge - VAS 6341/1- to 0.
– Make sure that dial gauge can move freely.
– Operate hand vacuum pump - VAS 6213- until turbocharger
tester - V.A.G 1397A- indicates 460 +/- 5 mbar.
– The dial gauge must indicate between 4.1 mm and 4.3 mm;
otherwise, turn rod of vacuum unit until the value is indicated.
– Tighten lock nut hand-tight.
– Repeat adjustment.
Note
The values in mm refer to the read value (includes 1 mm preten‐
sion).
– Vent system via pressure control valve - VAS 6342- so that
pressure reading drops to 0 mbar.
– Set dial gauge - VAS 6341/1- to 0.
Note
The following measurements must be performed in continuous
sequence. Do not allow the pressure to drop to 0 between meas‐
urements.
– Operate hand vacuum pump - VAS 6213- until turbocharger
tester - V.A.G 1397A- indicates 460 +/- 5 mbar.
– Read off and note value indicated on dial gauge - VAS
6341/1- .
– Actuate hand vacuum pump - VAS 6213- until turbocharger
tester - V.A.G 1397A- indicates 650 mbar to 700 mbar.
– Vent system via pressure control valve - VAS 6342- so that
pressure reading drops to 460 +/- 5 mbar.
– Read off and note value indicated on dial gauge - VAS
6341/1- .
– Add values 1 and 2 together and divide by 2.
– The result (mean value) should be 5 +/- 0.25 mm.
– Correct setting if the result (average) is not 5 +/- 0.25 mm,
tighten lock nut hand-tight and repeat measurement.
– If the result (mean value) is 5 +/- -0.25 mm, tighten the lock
nut to 9 Nm and secure with sealing paint.
442
Rep. gr.21 - Turbocharging/supercharging
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
– Secure locking plate -1- above linkage on turbocharger.
1.6
Removing and installing vacuum unit for
turbocharger
Removing:
– Remove turbocharger ⇒ page 432 .
Engine code BZB, CGYA, CDAA, CDAB:
– Detach locking plate above turbocharger linkage.
– Loosen lock nut -2-.
– Separate rod from turbocharger -3-.
– Remove vacuum unit -1- from turbocharger -arrows-.
Engine codes CAWA, CAWB, CBFA, CCTA, CCTB, CCZA,
CCZB, CCZC, CCZD:
– Pull securing clip off vacuum unit linkage.
1. Exhaust turbocharger
443
2024 VW Passat Owner's Manual
VW Passat B7 Service & Repair Manual
VW Passat B6 Service & Repair Manual
