Valve Guides, Checking
Special tools and workshop equipment
required
Dial Gauge Holder -VW387-
Dial Gauge - 0-10mm -VAS6079-
Procedure
Note
If the valve is replaced during repair, use the new valve
for measurement.
Due to different stem diameters, only use an intake valve in
the in
Function of Air Quality Sensor -G238-
Note
There are different versions of the Air Quality Sensor
-G238-/ humidity sensor in Fresh Air Intake Duct -G657--A-.
Therefore, ensure the correct allocation. Refer to the Parts
Catalog.
Depending on the vehicle version, there are different fres