Table of Contents
Advertisement
ENGINE: COOLING
77
Directions for Service.
Check the cooling system for leakage using tester
Ap. 5066
as
follows:
- fit
the radiator filler cap of car under inspection
to the tester Ap. 5066 with the kit hose attached;
- operate the tester pumping air into the hose;
the radiator filler cap should let air out when pres-
sure has built up to 5.7 psi (0.4
kg/em~);
- if the cap is serviceable, affix the tester to
the radiator as shown in
fig.
129;
- pump air in until pressure rises to 14.2 psi
(1
k9Jcm:l);
no pressure losses must be detected.
Otherwise check radiator hoses and radiator
(or leaks as outlined in covering chapter_
The system must be refilled exclusively with a
50-50
mixture of magnesium free water
and FIAT
Paraflu 11 liquid, with no sealing powder added.
Total capacity of the system is 6.6 G.B.qts - 7.9
U.S.qts (7.5 Its). To fill up pull the heater radiator
control lever (red coloured).
Remove radiator and expansion tank caps and
pour coolant into the expansion tank until it over-
flows from radiator neck.
Start the engine and run it at idle so to bleed
the circuit.
Fig. 129 - Checking leakage of cooling system by means of
tester
Ap. 5065.
Top up to 2
3/ 4 "
(7 cm) above minimum mark
and fit caps,
In case the engine radiator or the heater radiator
have been taken down for service, refill the circuit
with the old liquid after flushing the radiator
thoroughly with a 2.5% solution of acetic acid.
On cars circulating in or for export to hot weather
countries, the long lasting liquid can be safely re-
placed (as a result of repair jobs or after 36,000
Fig. 130.
Diagram of engine cooling system.
1.
Radiator. - 2. Radiator cap. - 3. line.
radiator-lo-expansion tank. - 4. Translucenl
expansion tank. -
5.
Expansion tank cap. -
6. Fan. - 7. By-pass line, cylinder head-lo-
pump (thermostat still closed). - 8. Coolant
pump. - 9. Thermostat in engine water
outlet duct.
Advertisement
Table of Contents
