Audi Q7 2007 Workshop Manual page 169

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boiling point of the coolant. For these reasons the cooling
system must be filled all year round with the correct anti-
freeze and anticorrosion additive.
Because of its high boiling point, the coolant improves en-
♦
gine reliability under heavy loads, particularly in countries
with tropical climates.
Frost protection is required down to about -25
♦
tries with arctic climate: down to about -35
The coolant concentration must not be reduced by adding
♦
water even in warmer seasons and in warmer countries.
The antifreeze percentage must be at least 40 %.
If greater frost protection is required in very cold climates,
♦
the amount of "G 12+" can be increased, but only up to
60 % (this gives frost protection to about –40
antifreeze percentage exceeds 60%, frost protection de-
creases again and cooling efficiency is also impaired.
Use only clean tap water for mixing coolant.
♦
If radiator, heat exchanger, cylinder head, cylinder head
♦
gasket or cylinder block have been renewed, do not re-use
old coolant.
Contaminated or dirty coolant must not be used again.
♦
To check frost protection level of coolant additive "G12+"
♦
you must use a refractometer -T10007-.
Secure all hose connections with the correct type of hose
♦
clips (same as original equipment) ⇒ Parts catalogue.
–
Push coolant hose -arrow- onto coolant pipe (right-side)
until it engages.
–
Connect coolant hoses to coolant pipes -arrows-.
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
°
C (in coun-
°
C).
°
C). If the
1 Removing and installing parts of cooling system
Audi Q7 2007 !
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