Heater Matrix - Dismantling And Reassembly; Heater Coolant Valve - Removal And Refitting; Air Conditioning System - Component Renewal; Compressor Drivebelt - Ford Scorpio Owner's Manual

19.19 Release the facia wiring loom from
the bulkhead to gain access to the
demister nozzle retaining nut and screw
(arrowed)
16 Locate the heater matrix feed and return
hoses on the engine compartment bulkhead.
Slacken the retaining clips and disconnect
both hoses from the matrix unions. Be
prepared for some coolant spillage. Plug the
matrix unions to prevent residual coolant
being spilt as the assembly is removed.
17 Slacken and remove the two retaining
screws then remove the matrix cover plate
and gasket from the bulkhead; discard the
gasket as a new one should be used on
refitting.
18 Remove the facia panel.
19 Release the facia wiring loom from the
bulkhead to gain access to the demister
nozzle fasteners (see illustration).
20 Remove the retaining nut and screw then
detach each windscreen demister nozzle from
the heater assembly. Undo the two retaining
nuts and detach the centre face level nozzle
from the heater.
21 Slacken and remove the two retaining nuts
then detach the right-hand face level nozzle
from the heater and remove it from the vehicle.
Repeat the procedure for the left-hand nozzle.
22 To detach each rear footwell nozzle from
the heater unit, remove the pin from the nozzle
retaining clip whilst supporting the outer part
of the retaining clip from the rear (see
illustration). Note: If the rear of the clip is not
supported when the pin is removed it will drop
down into the nozzle. To retrieve the clip will
require the removal of the vent which first
requires the front seat to be removed and
carpet lifted.
23 Disconnect the wiring connector from the
heater control panel.
24 Undo the two nuts securing the heater
assembly to the bulkhead then carefully
manoeuvre the assembly out of the vehicle
whilst being prepared for the possibility of
coolant spillage from the matrix unions.
25 Refitting is a reverse of the removal
procedure noting the following points.
a) Tighten all retaining nuts and screws
securely and ensure that all nozzles are
securely connected to the heater
assembly so that there are no air gaps or
leaks.
19.22 Detach the rear footwell nozzles from
the heater assembly
b) Check the operation of all heater cables
before refitting the facia, ensuring that the
relevant component moves smoothly from
the fully open to the fully closed position.
c) Ensure that the heater hoses are correctly
reconnected and are securely held by the
retaining clips.
d) Use a new gasket when refitting the matrix
cover plate.
e) Refill the cooling system.
20 Heater matrix - dismantling
and reassembly
1 Remove the heater assembly as described
in the previous Section.
2 Remove the two screws which secure the
heater matrix. Withdraw the matrix.
3 If the matrix is leaking it is best to obtain a
new or reconditioned unit; home repairs are
seldom successful.
If the heater matrix is blocked
it can sometimes be cleared
by reverse-flushing using a
garden hose and a proprietary
radiator cleaning product if necessary.
22.1 Air conditioning system
component locations
1 De-ice thermostat
2 Evaporator
3 Expansion valve
4 Compressor
5 Compressor clutch
6 Pressure switch
7 Sight glass
8 Dehydrator
9 Cooling fan
10 Condenser
Cooling, heating and ventilation systems 3•9
4 To dismantle, release the clips which secure
the casing halves together by using a
screwdriver. Carefully prise the halves apart
and separate them.
5 Remove the flap valves and operating levers
from the casing halves, noting how they are
fitted for reference when reassembling.
6 Flush the matrix with clean water to remove
any debris.
7 Reassembly is a reversal of dismantling.
Additional clips may be needed to secure the
casing halves once they have been separated.
21 Heater coolant valve -
removal and refitting
1 Drain the cooling system.
2 Noting the correct fitted positions, slacken
the retaining clips and disconnect the coolant
hoses from the valve.
3 Disconnect the vacuum pipe from the top of
the valve then unclip the valve and remove it
from the retaining bracket.
4 Refitting is a reverse of the removal
procedure ensuring that the coolant hoses are
reconnected to their original unions on the
valve and are securely held in position with the
retaining clips.
22 Air conditioning system -
component renewal
1 Only those items which can be renewed
without discharging the system are described
here. Other items must be dealt with by a Ford
dealer or air conditioning specialist (see
illustration).

Compressor drivebelt

2 Disconnect the battery earth lead.
3 On OHC engines, remove the radiator
cooling fan.
4 Slacken the compressor strap and pivot
bolts (see illustration), move the compressor
3