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Cooling system (liquid-cooled engine)
3 . 5
Caution: The radiator unions are fragile. Do
not use excessive force when attempting
to remove the hoses.
4 Undo the reservoir mounting screw and
remove the
reservoir
(see illustration 5.3).
5 Undo the radiator mounting bolts and
remove the radiator (see illustration 6.3).
Note: Some of the bolts have captive nuts,
some do not.
6 A heat shield is mounted behind the
radiator; remove the heat shield if required
(see illustration).
7 Check the radiator for signs of damage and
clear any d ~ r t or debris that might obstruct air
6.6 Heat shield fits behind the radiator
flow and ~nhibit cooling (see Chapter 1,
Section 19). If the radiator fins are badly
damaged or broken the radiator must be
renewed.
If a radiator hose i s corroded
in place on its union, cut the
hose with a sharp knife then
slit
it
lengthways and peel it
o f f the union.
Whilst this means
renewing the hose, it i s preferable t o
,
buying a new radiator.
lnstallation
8 lnstallation is the reverse of removal, noting
the following:
Align the heatshield with the holes for the
headlight panel fixing screws.
Tighten the mounting bolts securely.
Ensure the coolant hoses are in good
condition (see Chapter 1, Section 19), and are
securely retained by their clips, using new
ones if necessary.
Refill the cooling system and bleed it
correctly (see Section 2).
Water pu
check, re
Imp
-
moval an(
j
installati
1 The water pump is located on the right-hand
side of the engine (see illustration 2.3b). The
pump is driven by the alternator rotor.
2 An internal seal prevents leakage of coolant
from the pump; if the seal fails coolant will
drain out of the bottom of the pump housing.
Individual components are not available for
the pump; if it is leaking coolant a new unit
must be fitted. Note: Leaks leave tell-tale
scale deposits or coolant stains. Ensure the
coolant is leaking from inside the pump and
not from a hose connection or damaged hose.
Removal
3 Drain the coolant and leave the hoses
detached from the pump (see Section 2).
4 Undo the pump mounting bolts and remove
the bolts and the guide for the upper coolant
hose (see illustration).
5 Lift the pump away from the engine, noting
how the pump drive dampers are attached to
7.5a Water pump is driven by dampers on
7.5b
. . .
which engage in holes in the back
the alternator rotor..
.
of the pump
the alternator rotor and how the dampers
locate into the back of the pump (see
8 Coolant hoses-
illustrations).
removal and insta
6 If required, hold the alternator rotor to prevent
it tumina and unscrew the dampers. Renew the
damperrubbers as a set if they'are wom.
lnstallation
7 lnstallation is the reverse of removal, noting
the following:
Make sure the drive dampers fit correctly
into the back of the pump.
Tighten the pump mounting bolts to the
specified torque setting.
Ensure the coolant hoses are pushed fully
onto the pump unions and secured with the
clips.
Refill the cooling system and bleed it
correctly (see Section 2).
8.2a Loosen the hose clip (arrowed) and
slide it back along the hose.
. .
1 Before removing a hose, drain the coolant
(see Section 2).
2 Loosen the hose clip, then slide it back
along the hose clear of the union. Pull the
hose off its union (see illustrations).
3 If a hose proves stubborn, release it by
rotating it on its union before working it off. If
all else fails, slit the hose with a sharp knife at
the union (see Haynes Hint in Section 6).
Caution: The radiator unions are fragile. Do
n o t use excessive force when attempting
to remove the hoses.
8.2b
. . .
then pull the hose off the union
(arrowed)
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