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Engine
911 GT3 Cup (991)
MY 2015
1.4.3
Coolant
Upon delivery, the cooling system is filled with 11 liters (11.6 qts.) of water and 11
liters (11.6 qts.) of low temperature/freezing protection, ensuring a low
temperature/freezing protection up to -30° C (-22° F).
For all racing events, Porsche Motorsport recommends substituting the factory filled
coolant with 20 liters (21 qts.) of water and 2 liters (2.1 qts.) of corrosion protection
(spare part no. 997.106.907.90). Corrosion protection protects the water-carrying
parts from corrosion, reduces cavitation, lubricates the water pump and raises the
boiling point of the coolant.
For support races to the Formula 1 world
championship, the coolant has to be substituted as
described below.
Approx. 20 liters (21 qts.) of water plus at least 2 liters
(2.1 qts.) of corrosion protection, spare part no.
997.106.907.90
Filling quantity: 22 liter (23.2 qts.)
1.4.4
Filling the cooling system
Refer to chapter 7 „Maintenance“.
1.4.5
Races at low temperatures
For operations at low temperatures, the radiators much be masked in order to
operate the engine at optimum operating temperature. The following procedure must
be observed:
First, cover the central radiator with masking tape (starting from the top). If this is not
sufficient, cover up to 2/3 of the two outer radiators (starting from the top). It is not
permitted to cover the side radiators completely, as their exhaust is used for cooling
the brakes.
NOTE
Version: 16.12.2014
19
Содержание 2015 911 GT3 Cup
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