bonnet FORD SIERRA 1984 1.G Cooling And Air Conditioning Systems Workshop Manual

Compressor drivebelt
2Disconnect the battery negative lead.
3On SOHC models, remove the thermo-
viscous cooling fan.
4Slacken the compressor mounting and
pivot bolts, move the compressor towards the
engine and remove the old drivebelt (see
illustration).
5Fit the new drivebelt, position the
compressor to achieve the correct belt
tension, then tighten the mounting and pivot
bolts.
6On SOHC models, refit the thermo-viscous
cooling fan.
7Reconnect the battery negative lead.
Condenser fan and motor
Models up to 1987
8Disconnect the battery negative lead, and
remove the radiator grille. On Ghia models,
remove the front bumper.9Disconnect the fan wiring connector at the
side of the condenser.
10Remove the three securing bolts and
withdraw the fan assembly. Turn the frame to
position the fan wiring on the dehydrator side
to avoid damaging the wiring. Take care also
not to damage the condenser fins or tube.
11To remove the fan blades from the motor,
remove the retaining nut and circlip. The nut
has a left-hand thread, ie, it is undone in a
clockwise direction.
12With the blades removed, the motor can
be unscrewed from the frame.
13Reassemble and refit in the reverse order
of dismantling and removal.
Models from 1987
14Disconnect the battery negative lead.
15Remove the bonnet lock.
16Unclip the guard from the fan frame.
17Disconnect the fan wiring connector (see
illustration).
18Apply the handbrake, jack up the front of
the vehicle and support on axle stands (see
“Jacking and Vehicle Support”).
19Unscrew the two lower condenser
securing bolts and disengage the condenser
from the top of the radiator by releasing the
three clips.
20Unscrew the four securing bolts and
detach the fan assembly from the condenser.
Withdraw the fan assembly from underneath
the vehicle.
21Proceed as described in paragraphs 11 to
13 inclusive.
De-ice thermostat
22Disconnect and remove the battery.23Disconnect any vacuum hoses,
windscreen washer hoses and electrical
wiring as necessary, then unscrew the four
securing bolts and on models up to 1987 the
single nut, and remove the right-hand plenum
chamber cover plate from the bulkhead.
24Disconnect the thermostat from the
evaporator casing and withdraw it. Also
withdraw the thermostat probe from the
casing.
25Refitting is a reversal of removal.
Heating/air conditioning controls
26The procedure is similar to that described
for the heater controls but additionally the
vacuum hoses must be disconnected from
the control unit vacuum valve during removal,
and reconnected when refitting.
Cooling, heating and air conditioning systems 3•11
3
21.17 Air conditioning condenser fan
wiring connector location (arrowed) -
models from 198721.4 Typical air conditioning compressor
mounting and pivot bolts (arrowed)