Porsche 911 GT3 R 2012 Technical Manual page 21

3.5.4.1. Filling the cooling system with engine at normal operating temperature:
3.5.4.2. Heating of the filled cooling system
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 bars.
The system filling procedure should 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.
For the heating of an already filled system Sobek offer an extern heating
unit.
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