Saab 96 - Cleaning the Cooling System

the points be burnt, or otherwise be in poor condition, the
pump should be checked by a service garage.
5. Assemble cover 9, nut 22 cable, and nut 21 to their original
positions. Tighten the terminal nut 21 firmly to assure satis
factory contact.
Cooling System
General
When topping up or draining the cooling system, the heater control
4, fig. 33. should be in the "Hot" position. Note that the filler cap
must be loosened when draining. Topping up of the radiator must be
done in
two steps, so that the heater element will also be filled with
coolant. When the radiator is full, more coolant may be added, if
the engine is raced moderately for a few seconds. Use only clean
coolants, preferably pure rain water, which eliminates the formation
of deposits in the system. Never top up with a considerable amount
of cold water if the engine is hot, as this may crack the cylinder
block.
Greatest care should be exercised when removing the filler cap in
case the coolant is boiling. Unscrew the cap carefully to let out the
steam before removing the cap.
Cleaning the Cooling System
The coolant should be changed twice a year, spring and autumn, and
in connection with this the system should be cleaned by flushing.
The flushing is carried out in opposite direction to the normal flow
of the coolant. Thus the block should be flushed through the upper
neck and downward and the radiator through the lower pipe and
upward. Cracked hoses and defective clamps should be replaced.
If the flushing proves to be insufficient for removing deposits,
the system should be cleaned by a service shop with special equip
ment for cleaning cooling systems. In order to prevent further for
mation of deposits some rust inhibitor or glycol may be used.
Remember
1. That the heat control should be in the "Hot" position when
draining and filling the cooling system.
2. That filling of coolant should be carried out in two steps, so
that the heater element becomes completely filled up.
3. That the filler cap should be loosened when draining.
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