Rolls-Royce Bentley Corniche User Manual download pdf (Page 10)

8.

Unscrew

and

remove

the

crankcase

drain

plug{s).

Cars

prior

to

?g89

model

year,

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

tub

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

operation

to

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

equipment.

20.

Examine

all

heater

system

hoses

and

renew

any

that

show

signs

of

deterioration.

5/88

TSD

4700

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