1
2
Charge pressure control valves
90
Fig. 1
The engines are equipped with charge pressure
control valves (also know as waste gates, arrow).
Their task is to limit the charge-air pressure to a
precisely defined value.
Fig. 2
The charge pressure control valves are mainten-
ance-free.
Manipulation or modification of the setting is not
permitted.
For replacement, unscrew the air hose and loosen
the mounting bolts.
Use a new sealing ring.
Function check
The charge pressure control valve must be re-
moved before its function can be checked.
It is recommended to remove the air hose from the
intake manifold, as the air pump (special tool) can
be connected to this air hose.
Use the air pump to apply pressure to the charge
pressure control valve.
At a pressure of 2 bar, the valve should open a few
millimetres.
If the charge pressure control valve does not meet
this requirement, it must be replaced.
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