Workshop Manual

Workshop Manual
Workshop Manual
Rolls-Royce B Bentley
motor cars
Rolls-Royce Silver Spirit
Rolls-Royce Silver Spur
Rolls-Royce Corniche
Rolls-Royce Corniche l1
Bentley Eight
Bentley Mulsanne
Bentley Mulsanne S
Bentley Turbo R
Bentley Continental
Cars built fromvehicle
identification number (V1N)
Volume 2
TSD 4700
October 1989
General information
Chapter B
Special processes
Air cariditioning system
Chapter D
Chapter F
Propeller shaft
Chapter G
Sub-frames and Suspension
Final drive
Chapter K
Fuel system and Emission control systems referto
TSD 4737 Engine MsnsgernentSystems
Chapter L
Engine cuoling system
Chapter M
Electrical system referto TSD 4701 Electrical Manual
Chapter N
Steering system
Torque tightening figures
Exhaust systems
Wheels and Tyres
Chapter T
Chapter L
Engine coolilngsystem
Rolls- Royce
Contentsand issue record sheet
Radiatorassernbtyand expansion
Thermostat hou3ngassembly
Speciat torque tightmingfigures
Comiche/ Eight
Mulsanne/ Turbo R Continental
Comiche II
Mulsanne S
Issue record sheet
The dates quoted below refer to the issue date of individual pages within this chapter.
TSD 4700
Section L2
The sealed cooling system comprises a pressurized
expansion bottle. a radiator. and a pump. Also, various
passages and pipes convey the coolant around the
system (see fig. 12-11.
A mixture containing equai amounts of approved
coolantlanti-freeze and water should be used in the
system at at1 times.
The coolant mixture in the system should always
be maintained at the correct level and this must be
checked at the intervals specified in the Service
Schedule Manual, TSD 4702.
The coolant level can be checked at the translucent
expansion bottle. The correct level should be between
the MAX and MIN marks on the bottle. If afull checkis
to be carried out refer to page L3-3.
Thecooling system is pressurized and the correct
pressure is maintained by the expansion bottle
pressure cap. Removal of the pressure cap while t h e
engine and radiator are still hot requires extremecare.
The coolant pump is situated at the front of the
engine and is driven from the crankshaft by twin
matched 'Vee' belts.
Coolantfrom the bottom of the radiator is pumped
via transfer pipes and crankcase passages directly
onto the outside of the 'wet' type engine cylinder
liners and then into the cylinder heads. From the
cylinder heads the coolant travels along transfer pipes
and then flows past the thermostat to the top of the
When the engine is cold the thermostat is closed.
Therefore, the coolant by-passes the radiator matrix
and is recirculated through the engine to reduce the
warm-up period. Once normal operating temperature
is attained, the thermostat opens and the coolant is
directed t o the radiator.
The temperature of the coolant is registered on
the gauge situated on the facia. Whenever the ignition
ison, a transmitter situated in the thermostat housing
signals the coolant temperature to the gauge.
Fig. K-1 Diagrammatic view of the cooling system Dotted line
5/88 '
- 1989 model year cars
TSD 4700
Section L3
The cooling system should contain a 50% mixture of
an approved coolantlanti-freeze and water. This
mixture not only provides frost protection down to a
temperature of -37°C I-35"F), but it also prevents
corrosion of the cooling passages.
Refer to the Service Schedule Manual, TSD 4702,
to obtain the specified service intervals for renewing
the coolant, fitting a new thermostat, and reverse
flushing the system.
Except in an emergency, water must not be used
to eitherfill or top-up the cooling system. If a situation
does arise where water is used, the coolant mixture
must be corrected as soon as possibie, othetwise
corrosion damage will occur to the engine cootant
The trade name of the cootantlanti-freeze is fC1007i
400F {obtainable under a Rolls-Royce and Bentley
label) and should be used all year round. Do not mix
IC1 007/400F or topup with any other brand of coolant/
Fig. l3-l Checkingthe anti-freeze concentration
TSD 4700
L3- 1
Pints Litres
Fig. l3-2 Anti-freeze correction chart to give a 50% solution
A .Acceptable service range of concentration
D Volume of 100% anti-freeze to be added
B Freezing paint of coolant
to maintain a 50% solution after removal of the
C Percentage concentration
same volume of old coolant first
AMLfreeze concentration-To check
If the strength of the coolant requires increasing.
sufficient coolant should be drained from the radiator
and replaced with undiluted anti-freeze. Afterwards
run the engine until normal operating temperature is
attained and the anti-freeze has become thoroughly
mixed with the coolant. Stop the engine and again
check the concentration in the expansion bottle.
An acceptable level of anti-freeze concentration is
between 45% and 5596. Therefore, as a hydrometer
may be inaccurate where readings above 40% are
expected, it is recommended that a refractorneter
(see fig. W-l) is used in the following manner.
1, Lift the plastic cover on the refractometer (tester)
to expose both the measuring window and bottom of
the ptastic cover.
2. Thoroughly clean both exposed surfaces with
clean water and then wipe them dry with a clean soft
3. Carry out the usual workshop safety precautions.
4. Raise the bonnet and remove the expansion
bottle cap.
5. Release the tip of the clear plastic tube from the
tester and insefi it into the coolant in the expansion
6. Press and then release the bulb on the end of the
plastic tube.This will drawa small quantity of coolant
into the tube.
7. Withdraw the test equipment and bend the end of
the plastictubearound thetesterso thatthetip ofthe
tube can be inserted into the cover plate opening.
8. Press the bulb on the end of the plastic tube and
eject a few drops of coolant onto the measuring
9. Point the testertowards the light and look intothe
eye piece.
Do not open the plastic cover when taking a
reading. Evaporation of water from the fluid sample
being tested can affect the reading.
10. The anti-freeze protection reading is at the point
where the dividing fine between light and dark (edge
of shadow) crosses the scale. The anti-freeze reading
is on the right-handscale.
Note The tester temperature scale is reversed from a
standardthermometer. Below zero readings are
on the upper half of the scale.
11. If the temperature reading is higher (furtherdown
on the scale) than -31°C (-24°F)it will be necessary to
refer to figure W-2 and add the appropriate amount of
anti-freeze to the system.
A tester reading of -29°C (-2VFl is equal to an antifreeze concentration of 43% and is outside the service
limits. Follow the line upwards until the angled line is
reached, then trace the horizontal line to the scale on
the right-handsize ofthe graph tofind that 2 litres (3.5
Imp pt, 4.2 US pt) of coolant should be removed from
a full system and replaced with undiluted anti-freeze.
Once the additional concentrated anti-freeze has
mixed with the existing coolant the percentage
concentration will be 50%.
12. After adding undiluted anti-freeze, allow the
engine to apeme normalky for a few days before
carrying out further checks to determine the
percentage of anti-freeze concentration. This will
allow time for the anti-freeze to be thoroughly mixed
with the existing coolant.
The anti-freee concentration should be checked
in both the expansion boale and the radiator as
approximately 028 litres (0.5 lrnp pt, 0.6 US pt) is
transferred to andfrom the expansion bottle each time
the engine is warmed-up and then left to cool. Failure
to aflow the new anti-freeze to circulate properly will
result in a false reading.
Note ff a refractometer is not available and a
hydrometer has to be used a scale reading of
between l,W and 1,07 should be obtained, with
the coolant at room temperature, for the
mixture to be correct,
Coolant Itvbf To check and topup
Warning The cooling system becomes pressurized
during engine running. Therefore, extreme
care should be taken when removing the
pressurecapfrom an enginethat is warm or
at normal running temperature.
Routine check
To check the coolant level outside a normal service
schedule and when no coolingheating system fault is
reported or suspected, proceed as follows.
1. If the engine is hotensure that the coofant level in
the translucent expansion battle is at the MAX mark.
Top-up if necessary and reptace-theexpansion battle
2. If the engine is cold ensure that the coolant level
in the translucent expansion bottle is half-way
betweenthe MIN and MAX marks. Top-up if necessary
and replace the expansion bottle cap.
3. If the coolant level in the expansion bottle is either
below the MIN mark or there is no coolant in the
expansion bottle, carry out the Full check procedure.
Full check
To cheek the coolant level during a service schedule
andior when a cooling/heating system fault is reported
or suspected. proceed as foflows. l. Carry out the usual workshop safety precautions.
2. Check the coolant level in the translucent
expansion b&e and if the level is low or the bottle is
empty, allow the engine to cool. Then. remove the
pressure eap from the expansion bottle.
To remove the cap, turn it dowty anti-clockwise
until a check position is reached. Wait for any pressure
in the system to be exhausted, then continue to turn
the cap until it is released.
3. Fill the expansion bottle to the
level mark
with the approved coolant mixture.
4. Disconnect the radiator to expansion bottle hose
from the radiator and holdthe hose above the level of
the radiator top tank.
5. Remove the bleed plug from the top of the
radiator, by unscrewing it antitlockwise.
TSD 4700
6. Using a smal! funnel or a suitable size hose, add
the approved coolant mixture to the radiator through
the bleed plug aperture until coolant flows from the
radiator stub pipe.
7. Reconnect the hose to the stub pipe.
8. Fit the radiator bleed plug.
9. Start and run the engine. Then, turn ttre air
conditioning system funciion control fully clockwise
to the defrost position. This procedure opens the
heater system water tap.
10. Runthe engine for a minimum of 10 minuteswith
the pressure cap still removed. After 5 minutes, check
that warm air is passingfromthe windscreen demister
11. Top-up the expansion bottle as necessary to
ensure that the coolant in the bottle does not fall
below the MIN level mark.
12. Switch off the ignition
13. Top-up the expansion bottle with the approved
coolant mixture to approximately midway between
the MAX and MtN level marks on the bottle.
14. Fit the pressure cap to the expansion bottle,
Cooling system -To drain
1. Carry out the usual workshop safety precautions.
2. Place a clean container beneaththe radiator drain
3. Remove the radiator drain plug.
4, Raise the bonnet and remove the expansion
bottle pressure cap, allowing the coolant to drain into
the container.
5. To complete the draining procedure. unscrewthe
crankcase drain plug(s1.
Cars priorto 1989 modelyear, haveoneon either
side of the crankcase.
1989 model year cars, have one on 'B' bank side
only (see fig. L3-3).
Note To drain 'B' bank, it will be necessaryto remove
the engine dipstick tube assembly. to gain
accessto the drain ptug.Then, it is importantto
plug the dipstick union to prevent water
entering the engine oil sump.
Fig. L3-3 Crankcase coalant drain plug
Cooling system -To fill
Warning The following procedure must be carried
orrt exactly as described. Incorrectfilling will
create air locks within the engine and cause
irreparable damage due to resultant
'I. Carry out ths usual worbhop safety precautions.
2. Ensure that the crankcase drain plugls) are fitted
and tightened.
3. Ensure that the radiator drain plug is fitted.
4. Raise the bonnet and remove the expansion
bottle pressure cap.
5. Fill the expansion bottle to the MAX level mark
6. Disconnect the radiator to expansion b t t t e hose
from the radiator, and hold the hose above the level of
the radiator top tank.
7. Remove the bleed plug from the top of the
radiator, by unscrewing it anti-clockwise.
8. Using a small funnel or a suitablesize hose, fill the
system using the cormct coolantfanti-freeze and water
mixture. Pour t h e mixture into the system slowly to
avoid air locks.
9. When coolant flows from the radiator stub pipe,
reconnect the hose.
f 0. Fit the radiator bleed plug.
11. Start and run the engine. Then. turn the air
conditioning system funetion control fully clockwise
to the defrost position. This procedure opens the
heater system water tap.
12. Runthe engine for a minimum of 10 minutes with
the pressure cap still removed. After 5 minutes, check
that warm air is passing from the demister outlets.
13. Topup the expansion bottle as necessary to
ensure that the coolant in the bottle does not fail
below the MlN level mark.
14. Switch off the ignition.
15. Top-up the expansion bottle with the approved
coolant mixture to approximately midway between
the MAX and MIN lwel marks on the bottle.
16. Fit the pressure cap to the expansion bottle.
Cooling system -To flush
Under no cireurnstances should a strong alkaline
compound or dMergent be used to dean the cooling
system. Such compounds have a detrimental
chemical action on aluminium alloys.
l. Drainthe coolant (see Cooling system-To drain).
2. Remove the radiator top and bottom hoses.
3. Connect a waste pipe to the top connection an the
4. Apply mains water through the bottom
connectionto reverseflush the radiator untilthe water
runs clear.
5. Examinethe top and bottom radiator hoses and
renew any that show signs of deterioration.
6. Turn off the water supply, disconnect the
connectionsto the radiator andfit the top and bottom
7. Removethe top and bottom hoses connecting the
radiator to the engine.
Unscrew and removethe crankcase drain plug{s).
Cars prior to ?g89modelyear,have one on either
side of the crankease.
1989 model year ears, have one on 'B' bank side
only (see fig. U-3).
Note To drain 'B' bank, it will be necessaryto remove
the engine dipstick t u b assembly, to gain
access to thedrain plug-Then,it is importantto
plug the dipstick union to prevent water
entering the engine oil sump.
9. Remove the thermostat (see Section L51 and
again fit the outlet cover,
10. Produce a suitable adapter to fit into the eylinder
block drain plug aperture and connect via a hose to the
mains water supply.
11. Turn on the water and reverse flush the coolant
passages until the water runs clear.
12. Repeat the operationto the drain plug aperture on
the other side of the crankcase (if fmed).
13. Remove the flushing equipment.
14. Fit the drain plug(s1,thermostat, and cover. Use a
new thermostat cover gasket.
15. Examine all coolant hoses and renew any that
show signs of deterioration.
Heaier matrix
16. To flush the heater system, detach thematrix feed
hose atthe water tapand the return hoseatthe coolant
pump connection.
17. Connect a waste pipe to the feed hose connection
and a water main connection tothe return connection.
18. Turn on the water and reverse flush the matrix
until the water runs clear.
19. Turn off the water and remove the flushing
20. Examine all heater system hoses and renew any
that show signs of deterioration.
TSD 4700
Section L4
Radiator assembly and expansion bottle
The radiator assembly and expansion bottle are
mounted in the engine compament, at the front of
the car {see fig. L4-2).
Radiator assembly
This assembly is situated between the front of the
engine and the radiator grille.
On cars other than CornichelContinental, the
bottom of the radiator is tocated in rubber mounts by
two pegs and a t the top by two clamping blocks.
On ComichelContinentalcars, the bottom of the
radiatar is located in rubber mounts by two pegs and
at the top by two clips which attach to thetop deflector
Rubber hosesconnecttheinlet and outlet pipes of
the radiator with their respective connections on the
engine. Also, dependent on the model year of the car,
either one or two rubber hoses connect to the
expansion bottle. Worm drive clips are used to retain
all the hoses.
Two transmission oil cooler pipes connect into
the radiator bottom tank (see fig. L4-1).
Situated in the radiator are two plugs, a bleedfiller
plug in the top tankand a drain plug in the bottom tank.
Radiator assembly To remove and Fit
l . Carry out the usual workshop safety precautions.
2. Remove the bonnet if necessary {see Chapter S).
3. Drain the coolant (see Section W).
4 . . Slacken the worm drive clips securing the top
hose to the thermostat outlet elbow and to the
radiator. Free the joints and withdraw the hose. BIank
the open connections.
5. Slackenthe worm drive clips securing the bottom
hose tothecoolant pump and tothe radiator. Freethe
joints and withdraw the hose. Blank the open
6. Slacken the worm drive clip(sl securing the
hose(s)from the expansion bottle to the radiator. Free
the jointls) and withdraw the hose(sl.
7. Removethetwo setscrewsandclipswhich attach
the air bleed hose to the top left-hand side of the
8. Unscrewthe two pipe union connections from the
bottom of the radiator [seefig. L4-1L One pipe conveys
oil from the transmission to the radiator where it is
cooled in a separate matrix within the base of the
radiator. The other pipe returns the cooled oit to the
transmission. Allow any transmission fluid that drains
out to run into a clean container. Blank the open
9. Secure a sheet of foam rubber to the radiator
matrix inside the fan cowl. This will afford protection
to the matrix when the fan assembly is withdrawn.
10. Unscrew the fan coupling from the coolant pump
Fig. W1 Battomof radiator assembly
1 Lower mount location peg {21
2 Feed pipe connectionfrom expansion bottle
-Cars priorto 1989modelyear
3 Bottom hose outlet to engine
4 Oil connectionto transmission
5 Drain plug
6 Oil connectionfrom transmission
spindle, noting that it has a left-hand thread (see
fig. 14-31.
1'1. Withdraw the fan assembly.
72. On cars other than Cornicfte/Continental, remove
the radiator clamping block setscrews. Collect the
On CornicheIContinental cars, remove the
setscrews securing the radiator top mounting clips.
Collect the washers and clips.
Support the radiator assembly as the top mounts
are removed.
'13.Lift the radiator assembly from rhe bottom
14. Immediately the radiator is removed, secure
blanks to the inlet and outlet connections and half fill
the radiator with coolant.
15. Fit the assembly by reversingthe proceduregiven
for removal.
Note rhe special torque tightening figures (see
Section L71, and the torque spanner RH 9747 hecessary
for securing the fan coupling.
16. Check and adjust the transmission oil level (see
Chapter T I
Radiator assembly -To dismantle and assemble
l. Removethe setscrews securing the fan cowl to
the radiator. CoIlect the washers and withdraw both
the upper and lower halves of the cowl.
Notethat on four door cars the top two setscrews
TSD 4700
L4- I
on the left-hand side are longer, to accommodate the
clips securing the top air bleed hose.
2. Upon assembly, inspectthe foam rubber strips
secured to the edges of the fan cowl; renew if
3. Fit the two halves of the fan cowl (see fig. L U ) ,
ensuring that on four doorcanthe clipon each half of
the cowl engages in the bracket on the radiator.
4. Ensure that the two hose securing cfips aie fitted
to the top two setscrews on the left-hand side {four
door cars only).
5. Screw in the setscrews until the cowl faces abut
the radiator, then tighten each setscrew between a
half and a full turn.
Fig. Le2 Radiator and expansion batLle Inset fan cowl (Two door cars) Dotted line 1989 model year cars
Radiator To fwvmw flush
Refer to Section L3 Coolant.
Expansion bottle
itre plastic expansion bmle is situated on the lefthand valance, forward of the wheel arch.
The bottle is fitted with a pressure cap that
operates as both a pressure and vacuum relief valve.
The valve controls the pressure in the system to 1.03
bar (15 tbflin*). in addition, the vacuum relief valve
opens up to 0,l bar (1.45 IbWin2) below atmospheric
f he coolant level indicator float switch is
positioned in the top of the bottle.
Cars prior to 1989 model year
The battle has two connections to the radiator, a
feed pipe to the bonom tank and an air bleed pipe to
the top tank Also. an overFlow pipe connection to
1989 model year cars
The battle has a feed pipe to rhe coolant pump
elbow and an air bleed pipe to the top tank of the
radiator. Also, an overflow pipe connection to
Fig. W3 Fan assemMy retention
A Fourdoorcars
B Two door cars
hpnnsion W e -To remove and fit
1. Unscrew the worm drive clips securing fhe hoses
to the expansion bottle. Free the joints and withdraw
the hoses. Blankthe open ends ofthe hosesto prevent
coolant draining from the radiator. Drain the coolant
from the bottle into a clean container.
2. Disconnect the electrical leads from the coolant
level indicator switch.
3. Suppoit the expansion bottle and remove the
mounting setscrews. Collect the washers.
Withdraw the expansion bottle.
4. Fit the expansion bottle by reversing the
procedure for removal, noting the coolant toppingup
procedure given in Section W.
Cooling system booster fans
Twin booster fans are lo&ted between the radiator
grille and the refrigeration condenser. They are
switched from either engine coolant temperature, or
from refrigerant pressure.
The booster fans are electrically operated
assemblies. For additional information refer to
Electrical Manuals, TSD 4701 (prior to 1989 model
year) or TSD 4848 11989 model year).
L 4 4 Mountingwine for radiatorand fan cowl
1 Fancowl retaining setscrews
2 Radiatortop mount
Inset-Radiator top mounts (Twodoor cars)
TSD 4700
Section L5
Thermostat housing assembly
The thermostat housing is situated a t the forward end
of the induction manifold (seefig. L5-'I 1. It is connected
to the induction manifold by transfer pipes.
All cars are fitted with the same thermostat
housing. However, various themostat outlet elbows
can be fitted, dependent upon the specification of the
A number of electrical switches are fitted into the
thermostat housing dependent upon the specification
of the vehicle. For service details of these switches
refer to Electrical Manuals, TSD 4701 (prior to 1989
model year) or TSD 4848 (1989 model year).
The engine cooling system incorporates a wax
element thermostat (seefig. L5-2).When the engine is
started from cold the thermostat is in the closed
position. This reduces the engine warm-up time by
- the coolant leavingthe engine backto the
coolant pump, thus by-passingthe radiator. As the
cootant approaches its normal working temperature
the thermostat opens and allowsthe engine coolant to
flow through the radiator. When the thermostat is in
the fully open position it closes the by-pass circuit.
On top of the thermostat is the bridge piece and
into this is secured the fixed piston rod.
The valve assembly containing the wax capsule
seat, is on the underside of the top flange. ft is biased
i n this position by a spring and retained by a 'U' piece.
A second outer 'U' piece (by-passvalve) loaded by
a light poundage spring, is fitted to the bottom of the
thermostat to operate the by-pass circuit.
The top flange incorporatesa vent hole containing
a jiggle pin. This vent allows air to escape when the
cooling system is being filled. When the system is
operating the jiggle pin rises t o close the vent.
Also situated around the top flange are fusible
plugs. These plugs melt at approximately 124°C
(256F) and provide vent holes for the coolant, in the
event of the thermostat not opening, to control the
coolant temperature.
The thermostat operates when the coolant
temperature approaches between 85°C and 89°C
(185°F and 192°F). At this point the wax in the capsule
changes its state and expands rapidly. The expansion
compresses the rubber sleeve forcing it off the end of
the tapered piston rod. As the sleeve is an integral part
of the main valve assembly, this movement is
transmitted to the valve moving it downwards off its
seat. A small quantity of warm coolant is then allowed
to pass between the valve and its seat t o the radiator
matrix, where it is cooled.
Further rises in engine coolant temperature cause
a progressive opening of the main valve until a
temperature of between 99°C and '102°C (210°F) and
Fig. IS-l Thermostat llousing assembly
215°F) is m i n e d . At these temperatures the main
valve is fully open [maximum travel 14.27 mm (0.562
When the main valve assembly has opened
10 mm (0.375 in), the by-pass valve on the base of the
thermostat assembly will have moved under spring
pressure sufficiently to close the coolant by-pass
circuit and all coolant is then directed to the radiator
A decrease in engine temperature will cause the
wax in the capsule to contract and, due to spring
pressure, close the main valve and also open the
by-pass circuit.
The thermostat main valve assembly,. being
sensitive to the temperature of the surrounding
coolant, controls the flow of coolant to the radiator
matrix to suit the requirements of the engine.
At the service internals quoted in the Service
Schedule Manual, TSD 4702, a newthermostat should
be fitted.
Do not attempt to adjust the thermostat.
Thermostat To remove
1. Carry out the usual workshop safety precautions.
2. Drain approximately half the radiator coolant into
a clean container (see Section L31.
3. Disconnect the eiectricaI connection from the
thermostat outlet elbow.
4. Remove the setscrews securing the outlet etbow
to the thermostat housing. Coliect the washers.
5. Free the joint and lift off the thermostat cover.
6. Lift the thermostat out of the housing.
Thermostat To fit
Fit the thermostat by reversing the procedure given
for removal, noting the following.
1. Ensure that the joint faces are clean.
2. Always use a new gasket.
3, Fill the cooling system as described in Section 13.
Thermostat TotRemove the thermostatfrom the engine.
2. Suspend the thermostat and a thermometer in a
container filled with engine coolant.
3. Ensure that neither the thermostat nor the
thermometer are touching the container.
d. Slowly heat the coolant, stirring continuously to
ensure a uniform temperature.
5. Note when the thermostat opens and compare
the temperature with the information contained in the
following table.
Thermostat starts to open between 80°C and 89°C
1176°F and 192°F).
l Thermostat fully open [maximumtravel 14.21 mm
(0.562 in)] bebveen 99°C and 102°C 1210°Fand
Do not attempt to adjust the thermostat setting.
Ifits operation is suspect, fit a new unit.
6. AI tow the test equipment to cool and removethe
7. Examine the condition of the fusible plugs situated
around the top of the thermostat body (see fig. LS-2).
Ensure that they are intact and in good condition.
fig. L5-2 Thermostat
1 Jiggle pin
2 Tapered piston rod
3 Top flange
Fusible plug
Main valve
RUbber sleeve
Wax filled element
By-pass valve
Thermostat housing -To remove and fe
1, Carry out the usual workshop safety precautions.
2. Drain the coolant (see Section L3).
3. Disconnect the electrical connectionsfrom the
various switches in the thermostat housing and outlet
elbow. Label each connection to facilitate assernbiy.
4. Slacken the worm drive clip securing the rubber
outlet hose. Free the joint and withdraw the hose.
5. Remove the three setscrews retaining the
thermostat by-pass pipe to the coolant pump.
6. Remove the setscrew and retaining plate securing
'B' bank water transfer pipe to the thermostat
7. Unscrew the setscrews securing the water transfer
pipes to the inlet manifold.
8. Free the joints and manoeuvre the thermostat
housing away from the water transfer pipes. Slight
resistance may be encountered when withdrawing
the housing due to the rubber sealing rings situated
on the transfer pipes.
9. Fit the thermostat housing by reversing the
procedure given for removal, noting that new gaskets
and sealing rings must be used.
10. Fitl the cooling system as described in Section U.
Section L6
Coolant pump
The coolant pump i s situated at the front of the engine
and is belt driven from the crankshaft pulley.
The pump draws coolant from the bottom tank of
the radiator assembly and pumps it via the coolant
galleries in the crankcaseto circulate directly onto the
outside of the cylinders liners. The coolant then
circulates throug h galleries inthe top of the crankcase.
via the cylinder heads and transfer pipesto the
thermostat housing.
Dependent upon the temperature in the
thermostat housing, the coolant either by-passes the
radiator (because the thermostat is closed) and
recirculates through the engine, or passes through
the thermostat to be cooled in the radiator assembly.
The coolant pump is fitted to the engine as an
individual component. When either overhaul or
maintenance work becomes necessary it is not
Fig. W-l
Impeller and bearing assembly -To remove
(see fig. L 6 9 1
1. Drive the car onto a ramp and carry out the usual
'workshop safety precautions.
2. Raise the ramp to a convenient working height.
3. Drain the coolant (see Section L3).
4. Secure a piece of foam rubber inside the fan cowl
to protect the radiator matrix.
Coolant pump
1 Spindle
2 Abutment washer [outer)
3 Front bearing
4 Distance piece
essential t o remove the complete assembly, the pump
body can remain fmed to the engine and all moving
parts withdrawn as a sub-assembly (see fg. L 8 1 1.
If the coolant pump requires overhaul it b
recommended that a service replacement unit is
However, if this is not possible for any reason the
existing assembly can be overhauled.
Rear bearing
6 Abutment washer [inner)
7 Pumpseal
8 Impeller
- CornichelContinental
cars only
TSD 4700
5. Unscrew the fan coupling from the spindle, noting
that it has a left-hand thread.
6. Withdraw the fan assembly and lift it upwards
past the refrigeration pump.
Note Wit h the exception of Corniche/Continental
cars, a plastic type engine cooling fan is fitted.
CornichelContinentaicars havean aluminium
type engine cooling fan and a spacing washer
fitted between the fan and coupling.
7. Slacken, but do not remove the setscrews
securing the coolant pump pulley.
8. Releasethe tension of the drive belts. Removethe
9. Carefutly ease the coolant pump pulley foward to
reveal the bearing housing setscrews.
10. Remove the setscrews that secure the bearing
housing to the coolant pump casing.
11. Withdraw the bearing housing containing all the
moving parts.
At this stage of the removal procedure it is
possible to remove the pulley assembly from the
spindle spigot.
12. Remove and discard the rubber '0' ring from the
pump casing.
13. If the casing is to be removed, refer to Coolant
pump casing To remove.
Coolant pump easing -To remove
1. Refer to lmpeller and bearing assembly To
remove, and carry out Operations 1 to 8 inclusive.
2. Stacken the worm drive clips securing both ends
of the radiator bottom hose. Free the joints and
withdraw the hose.
3. Unscrew the w o r n drive clip(s) securing the
hose(s)to the coolant pump elbow. Withdraw the
4. If the car is fitted with an air injection pump it
should be removed as described in TSD 4737, Engine
Management Systems.
5. Remove the alternator and mounting bracket.
6. . Remove the refrigeration compressor and
mounting bracket (see Chapter C).
7 . On turbocharged engines, it will be necessary to
remove the turbocharger exhaust outlet pipe and
8. Unscrew the setscrews retaining the thermostat
housing to the coolant pump.
9. Remove the setscrews that secure the pump
casing to the crankcase. Collect the washers.
10. Remove the two remaining setscrews situated at
the top of the pump casing which are fitted from the
crankcase side.
11. Withdraw the coolant pump casing and the
sealirig strip fitted to the lower edge.
12. Using a sharp knife, cut the paper gasket across
the top edge of the crankshaft front cover and discard
this portion of the gasket.
Coolant pump To dismantle
1. Remove the impeller and bearing assembly from
the coolant pump casing (referto Impellerand bearing
assembly To remove).
2. Withdrawthe impeller from the pump shaft using
the special extractor RH 7098.
3. Remove the rear circlip from the spindle and tap
out the spindle from the housing using a mallet and
aluminium drift. Turn the housing over and remove
the circlip retaining the front bearing. Then, tap out
both the front and rear bearings, together with the
distance piece, and abutment washers. Discard the
pump seal.
Coolant pump To inspect
1. Examine the spindle for wear and damage.
2. Examine the bearings for free movement and the
inner bores for wear and damage.
Normally if the coolant pump is fauky a service
exhange unit should befitted. tf this is not available,
p r o d as foilows.
Coolant pump To assemble (see fig . L81 1
k is essential t o keep all parts clean during the
assembly procedure.
1. Before commencing to assemble the coolant
pump, ensure that any damage marks on the joint
faces of the bearing housing and pump casing are
rectified using a fine carborundum stone.
2. Insert the rear bearing intothe housing and tap
down using a mallet and suitablealuminium drift until
the bearing is approximately flush with the front inner
face of the housing.
3. Fit the front bearing onto the spindle together
with the distance piece and insert the assembly into
the bearing housing. Tap the spindle gently with a
mallet until the bearing starts squarely into its bore.
Then, remove the spindle and using a mallet and
aluminium drift. drive the bearing into the housing
until i t locates against the shoulder. This operation will
also drive the rear bearing thecorrect distance into the
4. Fit the outer abutment washer into the housing.
5. Fit the front bearing retaining cirdip, ensuring
that the chamfered side is fitted away from the
6. Fit the spindle into the housing and inven the
housing onto the spindle front face.
7 Fit the inner abutment washer onto the spindte.
8. Fit the rear circlip securing the spindle into the
9. Wipe clean the end of the spindle and the
counterbore in the housing with a clean cloth.
Lubricate the end of the spindle with clean engine oil.
Then, tap the pressure balance seal onto the spindle
and into the counterbore.
10. Again lubricate the end of the spindle with clean
engine oil and press on the impeller, noting that a
minimum load of 363 kgf (800 Ibf) should be required.
This ensures that the correct interference fit exists
between the mating faces.
1l. Usingfeeler gauges, ensure that thegap between
the face of the bearing housing and the impeller is
between 1,143 m m and t ,219 m m (0.045 in and
0.048 in).
7 2 Spin the assembly to ensurnthat the sh8ft rotates
C d a M pump-To m
Ffithe coolant pumpto the engine by reversing the
removal procedure, noting thefollowing.
1. If the casing has been removedfrom the
crankcase, ensure that the j0iM faces are free from
burrs. Any b u m shoutd be removed using a fine
carborundurn stone.
2. Obtain a new gasket and modify itto suit the
crankcase to coolant pump joint faces.
3. Tighten all b o b to the standard torque figures
given in Chapter P.
4. Tighten the drive belts as detailed in Chapter E.
5. Fill the system with woIant as described in
Section U.
6. Upon completion of the assernb.lyprocedure StaR
the engine and immediatelycheek for coolant system
leaks. tf satisfactory, nm the engine until normal
operatingtempemre is attained and again, check
the coolant system for leaks.
Section L7
Special torque tightening figures
This section contains the special torque tightening
figures appAcable to Chapter L. ..
For standard torque tightening figures refer to
Chapter P.
Section L4
Ref. Component
Components used during manufacture of the
vehicle have differentthread formations (Metric, UNF.
UNC, etc.). Therefore, when fitting nuts, bolts. and
setscrews it is important to ensure that the correct
type and size of thread formation is used.
Fan coupling
retention(LH. thread)
35 -40
TSD 4700
Section L8
Workshop tools
Extractor-Coolant pump impeller
Torquespanner- Fancoupfing
DubChek- AntiifmweBattewtester
TSD 4700
Service Bulletin for All Rolls-Royce and Bentley Motor Cars
03/10/06 TSD 6000 1990 - 2000 [English] / Anti-freeze and summer coolant Page 1
(OID = <130356_1_1_1> UID = <1944 130356> Dataset = <TSD 6000 1990 - 2000 [English]>)
Anti-freeze and summer coolant
Applicable to
All Rolls-Royce and Bentley motor cars prior to vehicle identification number (VIN) SCBZSOTO3HCX20001
This Product Support Information Sheet has been issued to outline the correct procedure when refilling/replenishing the cooling
system with ICI 007/400F anti-freeze and summer coolant. The original issue of Product Support Information Sheet L1 should be
ICI 007/400F anti-freeze and summer coolant has been introduced on all cars from and including vehicle identification number (VIN)
SCBZS0T03HCX20001 and will be supplied for all replacement purposes.
Prestone UT 184 coolant which was previously used has been replaced by ICI 007/400F coolant.
Prestone UT 184 can be identified by its green colour whilst the new ICI coolant is coloured blue.
Although it is generally accepted that coolants should not be mixed, the new ICI coolant can be mixed with Preston UT 184, if the need
Mixing with any other types of coolant is not recommended. If there is any doubt as to what type of coolant is present, it will be
necessary to flush the system completely (see Chapter L of the relevant Workshop Manual) before refilling with ICI 007/400F.
Whenever a system is refilled with ICI 007/400F, a coolant warning label (part number UE 70988) must be fitted to the radiator or
expansion tank in a prominent position.
Parts affected
Displaced part number Description
Quantity New part number
UB 33058L5
ICI 007/400F anti-freeze 5 litres
UB 33058L205
ICI 007/400F anti-freeze 205 litres UE 70936L210
Coolant warning label
UE 70936L5
UE 70988
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