Porsche 2012 911 GT3 CUP Technical Manual page 19

3.4.4.1. Filling the cooling system with engine at normal operating temperature:
Filling the system should be carried out as follows:
 Disconnect the quick release fittings in the engine bay and
connect the corresponding fittings with those of the filling system
 Switch on the pump, the system will be filled
The device must run for ten minutes to guarantee that the system

is correctly filled and bled
Warm-up the engine (80°C) and, if required, fill the reservoir

to the maximum level with the filling device still attached
The expansion tank cap must be closed throughout the

entire procedure
A special filling system to fill the engine water system when the engine is
at normal operating temperature is also available from Sobek. This
appliance consists of a fluid reservoir with a coupling. The reservoir is
charged with a pressure of 2.5 – 3.0 bar.
The system filling procedure must be carried out as follows:
 Disconnect the quick release fitting in the engine bay and connect
the filling system coupling to the corresponding end of the quick-
release fitting.
 The system is filled via the expansion tank.
16