FIAT Uno 45 - Manual (Page 62)

Engine idle speed
At normal operating temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800 to 850 rev/min
CO percentage at idle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 maximum
Torque wrench settings Nm lbf ft
Exhaust manifold nuts (903 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 15
Exhaust and intake manifold nuts (1116 cc, 1301 cc) . . . . . . . . . . . . . . 28 20
Fuel pump nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 20
Carburettor mounting nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
3•4 Fuel system
2.11B Air cleaner mounting bracket and
pipe clip
2.11A Air cleaner mounting studs (1116 cc) 2.9 Crankcase vent hose at air cleaner
1 Description and
maintenance 1
1 The fuel system consists of a rear-mounted
fuel tank, a mechanically-operated fuel pump
and a carburettor and air cleaner.
2 On all engines except the 1301 cc a single
venturi downdraught carburettor is fitted. On
the 1301 cc version, a dual barrel carburettor
is fitted.
3 Maintenance consists of periodically
checking the condition and security of the fuel
hoses to the pump and carburettor. The fuel
pump cannot be cleaned or repaired and in
the event of a fault developing, the pump
must be renewed.
4 On ES versions, an electronic fuel cut-out
device is fitted which reduces fuel
consumption on overrun, see Chapter 9,
Section 33.
2 Air cleaner - servicing,
removal and refitting 1
1 The air cleaner air intake draws air either
from the front of the car or from the outside of
the exhaust manifold according to ambient
temperature (photo).
2 At an ambient temperature of 13ºC (55ºF)
and above, the SUN symbol should align with
the intake spout arrow head. Remove the
cover nuts and turn the cover.
3 At an ambient temperature lower than this,
move the air cleaner cover until the
SNOWFLAKE symbol aligns with the intake
spout arrow head.
4 At the intervals specified in “Routine
Maintenance” renew the air cleaner filter
element.
5 To do this, remove the cover nuts and take
off the cover (photo).
6 Take out the filter element and discard it.
Wipe out the air cleaner casing (photo).
7 Locate the new element and refit the cover
aligning the appropriate symbols.
903 cc engine
8 To remove the air cleaner from the 903 cc
engine, unscrew the nuts and take off the
cover. Lift out the filter element.
9 Unbolt the air cleaner casing from the
carburettor flange and from the bracket on the
rocker cover. Disconnect the vent hose
(photo).
10 Disconnect the warm and cool air intake
hoses from their collecting points and lift the
air cleaner from the engine.
1116 cc and 1301 cc engines
11 Removing the air cleaner from the 1116 cc
engine is similar to that described for the
903 cc engine, but having a cylinder head
support bracket (photos).
2.6 Removing air cleaner element 2.5 Air cleaner cover 2.1 Air cleaner hot air intake