SAAB 9000. Instruction - page 21
3•6 Cooling, heating and ventilation systems
7.11 Water pump removed from the timing
cover (B2O2 engine)
7.33 Disconnecting the hoses from the
water pump
7.35 Removing the pulley from the water
pump drive flange
4 Remove the plastic moulding and the front
section of the wing liner from under the right-
hand wheelarch.
5 Remove the auxiliary drivebelt(s) as
described in Chapter 1.
6 Unscrew the bolts, and remove the pulley
from the water pump drive flange.
7 Unbolt and remove the auxiliary drivebelt
tensioner pulley.
8 Unscrew the bolt securing the oil cooler
hoses to the timing cover.
9 Unscrew the bolt securing the water pipe to
the cylinder block, and pull the pipe from the
water pump. Remove the O-ring.
10 Loosen the clips and disconnect the hoses
from the water pump.
11 Unscrew the mounting bolts, and remove
the water pump from the timing cover (see
illustration). Remove the gasket.
12 Clean all gasket and sealant from the
contact surfaces of the water pump and timing
cover.
Refitting
13 Ensure that all contact surfaces are clean.
Locate a new gasket on the timing cover.
14 Locate the water pump on the gasket,
then insert the mounting bolts and tighten
them progressively to the specified torque.
15 Reconnect the hoses and tighten the clips.
16 Locate a new O-ring on the water pipe,
and insert the pipe in the water pump. Insert
and tighten the bolt securing the water pipe to
the cylinder block.
17 Insert and tighten the bolt securing the oil
cooler hoses to the timing cover.
18 Refit the auxiliary drivebelt tensioner
pulley, making sure that the plate is located in
the slot in the bracket.
19 Refit the pulley to the water pump drive
flange, then insert the bolts and tighten to the
specified torque.
20 Refit and tension the auxiliary drivebelt(s)
with reference to Chapter 1.
21 Check that the radiator drain plug is tight,
then refit the centre deflector.
22 Refill the cooling system with reference to
Chapter 1.
23 Run the engine to normal temperature and
check for leaks, then stop the engine.
24 Refit the plastic moulding and the front
section of the wing liner under the right-hand
wheelarch.
25• Refit the right-hand front wheel, and lower
the car to the ground.
B204/B234 (balance shaft) engines
Removal
26 The water pump is driven by the auxiliary
drivebelt, and is located on the front right-
hand side of the engine.
27 Apply the handbrake, then jack up the
front of the car and support on axle stands
(see "Jacking, towing and wheel changing").
28 Remove the centre deflector from under
the radiator, then drain the cooling system as
described in Chapter 1.
29 Remove the coolant expansion tank from
its mounting. On models up to 1991, unscrew
the bolt; on later models, release the clip.
30 Loosen the clip and disconnect the lower
hose from the expansion tank. Where
applicable, disconnect the engine coolant
level sensor from the expansion tank.
31 Pull on the multi-groove auxiliary drivebelt
so that the automatic tensioner is retracted,
then hold the tensioner in this position by
fitting a home-made tool (see Chapter 1) in the
special slots. Slip the drivebelt from the air
conditioner compressor and water pump
pulleys.
32 Place a piece of cardboard over the oil
cooler and upper radiator crossmember (as
applicable), then disconnect the wiring from
the air conditioning compressor. Unbolt the
compressor and move it to one side without
disconnecting the refrigerant lines - also
remove the bracket.
33 Loosen the clips and disconnect the hoses
from the water pump (see illustration).
34 On Turbo models, remove the lambda
wiring cable clips, then remove the coolant
pipe from the turbocharger and water pump.
35 Unscrew the bolts, and remove the pulley
from the water pump drive flange (see
illustration).
36 Unscrew and remove the three mounting
bolts securing the top of the water pump to
the timing cover. Note that the upper bolt also
secures the support for the lambda sensor
wiring (see illustration).
7.36 Unscrew the upper water pump
mounting bolt which secures the lambda
wiring support
7.37a Removing the water pump and sleeve
from the cylinder block
7.37b Releasing the coolant pipe from the
aperture in the water pump
Cooling, heating and ventilation systems 3•7
7.37c Remove the adapter from the water
pump...
37 Carefully prise out the water pump and
sleeve from the cylinder block, at the same
time releasing the coolant pump from the
aperture in the water pump housing. Take care
not to damage the lambda sensor (where
fitted). Remove the adapter from the water
pump, then recover the O-rings from the
adapter and coolant pipe (see illustrations).
38 Unscrew the bolts, and separate the water
pump and cover. Remove the gasket (see
illustrations).
39 Clean all gasket and sealant from the
contact surfaces of the water pump and
housing.
Refitting
40 Ensure that all contact surfaces are clean,
Locate the water pump in its housing together
with a new gasket, then insert and tighten the
bolts.
41 Apply a little petroleum jelly to the new O-
rings, then locate them on the adapter sleeve,
water pump and coolant pipe.
42 Locate the water pump on the timing
cover; at the same time, locate the sleeve in
the cylinder block and engage the end of the
coolant pipe, then insert the bolts and tighten
them to the specified torque. Remember to fit
the lambda wiring support to the upper bolt.
43 Locate the pulley on the drive flange, then
insert and tighten the bolts.
44 On Turbo models, refit the coolant pipes
tothe turbocharger and water pump, and refit
the lambda wiring cable clips.
45 Reconnect the hoses to the water pump,
7.37d ... and recover the O-rings
position the clips and tighten them.
46 Refit the air conditioning compressor and
bracket, and reconnect the wiring.
47 Locate the multi-groove auxiliary drivebelt
on the pulleys, then pull it to retract the
automatic tensioner, and remove the locking
tool. Release the drivebelt, and make sure that
it is located correctly in the pulley grooves.
48 Where applicable, reconnect the engine
coolant level sensor to the expansion tank.
49 Reconnect the lower hose to the
expansion tank, and secure by tightening the
clip.
50 Refit the coolant expansion tank, and
tighten the bolt or reconnect the clip as
applicable.
51 Check that the radiator drain plug is tight,
then refit the centre deflector under the radiator.
52 Refill the cooling system with reference to
Chapter 1.
53 Run the engine to normal temperature and
check for leaks, then stop the engine.
54 Lower the car to the ground.
7.38a Unscrew the bolts .
temperature outside the car. The basic
heating/ventilation unit is common to all
versions, and consists of air ducting from the
centrally-located heater assembly to a central
vent and two side vents, with an extension
leading from the bottom of the heater through
the centre console to the rear passenger
footwell areas. A four-speed heater blower
motor is fitted.
2 The heating and ventilation controls are
mounted in the centre of the facia. Cable-
controlled flap valves are contained in the air
distribution housing, to divert the air to the
various ducts and vents.
3 Cold air enters the system through the grille
at the bottom of the windscreen. If required,
the airflow is boosted by the blower, and then
flows through the various ducts, according to
the settings of the controls. Stale air is
expelled through ducts at the rear of the
vehicle. If warm air is required, the cold air is
passed over the heater matrix, which is heated
by the engine coolant.
4 On later models, air circulator blower
motors are located in the rear doors (see
illustration).
5 On models fitted with air conditioning, a
recirculation switch enables the outside air
supply to be closed off, while the air inside the
vehicle is recirculated. This can be useful to
prevent unpleasant odours entering from
outside the vehicle, but should only be used
briefly, as the recirculated air inside the vehicle
will soon become stale.
7.38b ... separate the cover . . .
7.38c ... and remove the gasket
8.4 Air circulator blower motor located in
the rear door
1 Three types of heating/ventilation system
are fitted - the Standard system controlled
manually, the Standard system with air
conditioning also controlled manually, and the
Automatic Climate Control (ACC) system
which maintains the temperature inside the car
at a selected temperature, regardless of the
3•8 Cooling, heating and ventilation systems
9.13a Removing the wiper arms . . .
9.13b . . . and plastic covers
9.17a Removing the plastic end covers
9.17b Remove the retaining studs .
Heater blower motor (models
without air conditioning orACC)
Removal
1 Disconnect the battery negative lead.
2 Remove the ventilation air filter with
reference to Chapter 1.
3 Disconnect the wiring for the heater blower
motor and resistors.
4 Disconnect the inner cable from the
temperature control flap on the heater box.
5 Using a screwdriver, release the retaining
clips from each side of the heater blower
motor housing.
6 Push the housing downwards, then remove
it by moving it to the right-hand side of the car.
Withdraw the housing from inside the car.
7 Unscrew the central screw, then release the
clips and remove the grille from the discharge
outlet.
8 Separate the blower motor housing halves.
9 Unscrew the motor mounting screw, lift the
lead cover and remove the motor from the
impeller.
Refitting
10 Refitting is a reversal of removal.
9.15 Disconnecting the heater blower and
wiper wiring plugs
Heater blower motor (models with
air conditioning and/or ACC)
Removal
11 Disconnect the battery negative lead.
12 Remove the bonnet with reference to
Chapter 11.
13 Remove the wiper arms and plastic covers
with reference to Chapter 12 (see illustrations).
14 Where necessary, remove the covers from
the evaporator and wiper motor.
15 Disconnect the wiring for the heater
blower motor and wiper motor (see
illustration).
16 Unscrew the bolts and remove the false
bulkhead panel from the rear of the engine
compartment.
17 Carefully remove the plastic drainage
moulding from just below the windscreen. To
do this, first remove the plastic end covers,
then prise the moulding up using a screwdriver
at the positions of the retaining studs. Place
the studs in a suitable container, and pull the
moulding from under the windscreen moulding
(see illustrations).
18 Unscrew and remove the mounting bolts
for the electronic control unit (ECU), and
position the ECU to one side.
19 Prise free the linkage rod, then unscrew
the mounting bracket screws, disconnect the
wiring and remove the wiper motor assembly
(refer to Chapter 12 if necessary).
20 Release the matrix coolant supply hoses
from the clip on the bulkhead. Identify the
hoses for position.
9.17c . . . and pull the moulding from under
the windscreen moulding
9.21 Disconnecting the hoses from the
heater matrix
9.22a Disconnecting the hose from the
cruise control vacuum adapter on the
bulkhead
Cooling, heating and ventilation systems 3•9
9.22b Releasing the vacuum hose from the
clip on the heater motor housing
21 Drain the cooling system with reference to
chapter 1 (or alternatively drain off a few litres
of coolant), then loosen the clips retaining the
hoses to the heater matrix. Disconnect the
hoses from the matrix (see illustration).
22 Where necessary, remove the throttle
dashpot. Also disconnect the vacuum hose
from the cruise control adapter tube on the
bulkhead, and release the hose from the clip on
the heater motor housing (see illustrations).
23 Unscrew and remove the mounting
screws for the cruise control system vacuum
pump, and position the pump to one side.
Disconnect the vacuum hose from the black
outlet on the pump.
24 Unscrew the evaporator body securing
screws, and release the refrigerant pipes from
the plastic clips (see illustrations).
25 Disconnect the inner control cable from
the temperature control valve on the side of
the heater blower housing (see illustration).
26 Move the evaporator and housing as far to
the right as possible, taking care not to
damage the refrigerant pipes.
27 Release the retaining clips and unscrew
the mounting screws (as applicable) and
withdraw the complete heater blower motor
unit (see illustration).It will be necessary to
turn the unit diagonally to do this in order to
bear the bulkhead.
28 With the unit on the bench, unscrew the
central screw, remove the plastic bracket,
then release the clips and separate the two
halves of the blower housing (see
9.24a Unscrewing the evaporator body
front..
9.24b . . . and rear securing screws ,
9.24c . . . and release the refrigerant pipes
from the clips
9.25 Disconnecting the temperature control
valve cable on the side of the heater blower
housing
9.27 Removing the heater blower motor
9.28a Unscrew the central screw
(arrowed)...
9.28b ... remove the plastic bracket...
9.28c . . . release the clips . . .
9.28d ... and separate the two halves of
the blower housing
