ABS AUDI A4 1998 B5 / 1.G APB Engine Charge Air System With Turbocharger Workshop Manual

21-8

Rules for cleanliness

When working on the exhaust gas turbocharger,
pay careful attention to the following 5 rules:

Thoroughly clean all unions and the adjacent
areas before disconnecting.
Place parts that have been removed on a clean
surface and cover. Do not use fluffy cloths!
Carefully cover opened components or seal, if
the repair cannot be carried out immediately.
Only install clean components: Only unpack
replacement parts immediately prior to
installation. Do not use parts that have been
stored loose (e.g. in tool boxes etc.).
When the system is open: Do not work with
compressed air if this can be avoided. Do not
move vehicle unless absolutely necessary.
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21-11


Notes: - Switch on turbocharger tester and set measuring range selector switch
to position -I- (absolute pressure).
- Connect measuring hose to connection -I-.
Hose connections must be completely airtight, otherwise
measurements will not be correct. Ensure that measuring hose is not pinched at hood or side window.Pressing memory key M on turbocharger tester will store the last
measured value until memory key M is pressed again or tester is
switched off. The decimal point in the display flashes to indicate that the value is
being stored. If the battery voltage of the turbocharger tester drops below the
minimum level, an arrow will appear at the top left of the display. Before performing the test, drive the vehicle at a brisk speed for at
least 3 km (without stopping at traffic lights etc.). A second mechanic is required to note the readings on the tester
when the vehicle is moving. Observe safety notes Page 21
-9 .
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