Electric Fan Control Thermal Contact; Checks And Inspections; Header Tank Pressurized Plug; Leak Test - Alfa Romeo alfa 33 Workshop Manual

L E A K T E S T
Remove radiator from car (Refer
to: Radiator Removal and Installa-
tion).
2. Close radiator outlet and inlet
unions.
3 . l m m e r g e r a d i a t o r i n a t a n k
previously filled with water and
check for possible leakages inflating

ELECTRIC FAN CONTROL THERMAL CONTACT

R E M O - V A L A N D
I N S T A L L A T I O N
1. Drain coolant.
2. Disconnect thermal contact ca-
bles.
3. Unscrew thermal contact from
radiator.
4 . I n s t a l l a t i o n i s c a r r i e d o u t i n
reverse order of removal.
5. At the end of
f i l l t h e c i r c u i t w i t h
procedure,
coolant and let the engine rotates
until coolant reaches the temperature
of 88 + 92°C (190.4 + 197.6"F) a n d
that electric fan inserts.
verify
HEADER TANK PRESSURIZED P L U G
L E A K T E S T
Screw fitting @ to test equip-
1.
ment and insert on header tank
pressurited plug.
2. Act on tool to increase pressure
and check on dial indicator that
blowoff valve opens at the required
setting pressure.
Pressurited plug setting pressure
69.6 kPa; (0.69 bar;
0.7
M a y 1 9 8 3
ENGINE COOLING SYSTEM
compressed
breather pipe until a pressure of
98.1
1 + 1 .I kg/cm2 ; 14.22 + 15.64 psi) is
reached.
4. If leakages are found, clean area
to be soldered by a wire brush and
deoxidate by "baked" hydrochloric
acid (zinc chloride).
5. Solder the leaking area.,
C H E C K S A N D
I N S P E C T I O N S
Check thermal contact according to
the following procedure:
test equipment used for thermostat
test.
2. Fill container with coolant and
switch on equipment to heat water.
installation 3. When warning light 0 illumi-
nates, verify that temperature shown
on thermometer dial indicator corre-
sponds to the thermal contact setting
value 88 + 92°C (190.4+ 197.6"F).
air through radiator
1 Pipe fitting
07-6
6. Test again radiator for leakages
as described above and then refinish
radiator with black synthetic enamel.
In case of leakages from radiator
fitted with side tanks (with gaskets),
replace the radiator.
7. Refit radiator to car (Refer to:
Radiator - Removal and Installation).
F i l l w i t h c o o l a n t a n d c h e c k f o r
leakages.
light
1 Warning 2 Thermal contact
2 Pressurized plug