Fiat 1998 Marea Weekend, Service Manual

Page: 35 / 846

Technical data
Engine: cooling system
Marea-Marea Weekend
99 range
OO.10
COOLING SYSTEM
Cooling circuit
coolant circulation via
centrifugal pump, radia-
tor, expansion tank and
fan operated by thermal
switch
coolant circulation via
centrifugal pump, radia-
tor and two speed fan
operated by engine con-
trol unit
Water pump operation through belt
Q / C + \ 1 st stage 90° - 94°C
-
^X. Thermal \ _ V i _i *
31 switch 2nd stage
95° 99°C ( • )
-
\f
to engage
1 s t s t a a e
. J f fan (stoo)
l s t s t a
9
e
85° + 89°C
-
• V 7
^— 2nd stage
95° + 94°C ( • )
-
1
s t
speed
-
96° - 97°C
Operated by nd
control unit 2" speed
-
101 - 102°
to engage / ~ \
l S
t
e r
.
fan (etnpj 1 Speed
-
93°
h
- 94°C
2
n d
speed
-
98° + 99°C
opening
81° - 85°C
Engine coolant
thermostat max opening
103°C 101°C-105°C
valve travel
> 9.5 mm
Fitting clearance between impeller
tj
vanes and pump casing -M-H-
0.4 +• 0.9 mm 0.4 0.95 mm
Pressure for checking system water tightness 0.98 bar
Pressure for checking exhaust valve on expansion
tank cap
0.98 bar
(•) Versions with climate control
Checking idle concentration of pollutant
emissions
CO (%) HC (p.p.m.)
C 0
2
(%)
Upstream of the catalytic converter 0 . 4 - 1 ^ 600 ^ 12
Downstream of the catalytic converter 0,35 5$ 90 > 13
24
Print n° 506.763/14