Saab 95 1967, Руководство по обслуживанию

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COOLING SYSTEM
Draining
1. Remove the filler cap of the radiator. As from the
1969 model, remove also the pressure cap of the ex-
pansion tank.
2, The coolant is first drained Off through the drain valve
in the lower part of the radiator. If the system is to be
drained completely, loosen also the two hexagon plugs,
one on each side of the lower part of the cylinder
block.
Empty the expansion tank by loosening it and then
holding it so high that the fluid pours into the radia-
tor.
3. The heat control of the fresh-air heater should point
to maximum heat, otherwise the system cannot be
fully drained.
Refilling
Coolant is filled through the radiator opening. When
doing this, make the heat control point to maximum
heat and open the bleeding nipple of the heat exchanger,
in order to have the system filled completely. As from
model 1969, fill the expansion tank up to the maximum
mark or, at the most 0.79 in. (20 mm) above it.
Once the cooling system is completely full, start the en-
gine und run it at a varying speed for approx. a minute
or until coolant escapes through the open bleeding nipple
of the heat exchanger. Now, shut the bleeding nipple.
Pour additional coolant into the radiator, as required,
then put both the caps on.
Only clean coolant is permissible. Never fill much of cold
water, if the engine is hot, or the cylinder block may
crack.
Check the level in the expansion tank after driving for a
few days, as a complete bleeding is achieved only when
the system has been warmed up and cooled off a few
times.
TOD up once the level is at the minimum mark again.
Use a recommended coolant only.
Four 1977
Cleaning
1. Drain off the water.
2. Flush the system with clean water.
3. Fill the system with clean water to which a suitable
commercial solvent has been added. Follow the sol-
vent manufacture’s instruction.
4. Shield the radiator and run the engine until warm.
Stop the engine and, after waiting a few minutes,
drain off the water.
6. Flush the system again with clean water, treating the
engine jacket and radiator separately. This time, flush
against the normal direction of coolant flow, i.e. flush
the engine jacket from the cylinder head and down-
wards, and the radiator through the lower connection
pipe and upwards.
Before flushing the system this time, back off the up-
per water neck and remove the thermostat.
7. Flush the heat exchanger also against the normal div
rection of circulation.
8. Check the function of the tap in the line to the heat
exchanger.
9. Refit the thermostat, water neck and hoses. Test the
system, also check that the radiator overflow pipe is
not choked up with foreign matter. If the cleaning
method described does not suffice to clear all deposits
from the radiator, take the radiator out of the car and
send it to a specialist.
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261.3