48 Cooling System
3 Use a reputable cleaner to clean the
cooling system. Follow the recommen-
dations that come with the cleaner.
4 Drain the cleaner and flush the cooling
system with clean water.
5 Fill the cooling system with clean wa-
ter and operate the engine until the
coolant temperature has reached 120
to 150
F (50
to 65
C).
6 Drain the water and flush the cooling
system with clean water.
7 Again, fill the cooling system with
clean water and operate the engine un-
til the coolant temperature has reached
120
to 150
F (50
to 65
C).
8 Drain the water and flush the cooling
system with clean water.
9 Fill the cooling system with pre-mixed
Extended Life Coolant. Check the
specifications section for refill quantity.
10 Attach label P/N 3969338 to the
coolant surge tank to indicate that the
system is now filled with Extended
Life Coolant. The label can be or-
dered from your Volvo Truck dealer
spare parts department.
NOTE! When changing over from standard
to extended life antifreeze, tighten all hose
clamps and fasteners in the cooling system.
Extended life coolant tends to leach out de-
posited silicate and leaks may appear.
W2002144
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