COOLING SYSTEM
31
Frost Precautions
The car heater cannot be completely drained by normal
methods. Therefore frost damage will not be prevented by merely
draining the radiator.
For your protection during freezing weather, an approved
anti-freeze solution should be added to the coolant in the
radiator. Because of the searching effect of these solutions,
advise your Dealer to check the system for leaks before adding
the anti-freeze
At certain temperatures glycol water solutions adopt a
"mushy" state with a viscosity which impairs circulation and can
immobilise or damage the water pump. Therefore, consult the
following chart before adding anti-freeze, for the degree of frost
protection required.
ANTI-FREEZE CONCENTRATION
25% 30% 35%
Complete Protection :-
Vehicle may be driven away immediately from cold
10°F (-12°C) 3°F (-16°C) -4°F (-20°C)
Safe Limit:-
Coolant in mushy state. Engine may be started and vehicle driven
away after short warm-up period
0°F (-17°C) -8°F (-22°C) -18°F (-28°C)
Lower Protection Limit:-
Prevents frost damage to cylinder head, block and radiator
Engine should NOT be started until thawed out
-14°F (-26°C) -22°F (-30°C) -28°F (-33°C)
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