Emission
Control
Systems
Adsorption
The air filter
pad
located in the lower section of the canister must be renewed
canister
every 12,000 miles or 12 months.
Fig. 3
To renew the filter pad disconnect the
vapour
pipes (2)
and
purge pipe (3), at the
top of the canister arid the air vent pipe
(Ijfrom
its connection at the
bottom
of
the canister. Remove the securing bracket
nut
and
bolt (4), collecting the spacer.
Raise
and
tilt the canister
and
unscrew the
bottom
section (5), withdraw
and
discard the old filter
pad
(6),
and
fit a new one. When refitting, ensure
that
all
connections to the canister are securely fitted.
Do
not
attempt to remove the
gauze or its retainer from inside the canister.
Fit
a new canister every 48,000 miles or 48 months.
Gulp
valve
To renew, disconnect the hoses (1)
and
sensing pipe (1) from the gulp valve.
Fig. 4 Unscrew the mounting screws
and
nuts (2) and remove the gulp valve (3).
Fit
the new valve, re-connect the hoses
and
sensing pipe, ensur ing that all joints are
made secure
and
airtight.
AIR
PUMP
Drive
belt Tension. When correctly tensioned, a total deflection of -t in. (13 mm.)
under
Fig. 5 moderate
hand
pressure, should be possible at the midway point of the longest
belt
run
between the pulleys.
Adjusting. To adjust the belt tension, slacken the securin g bolts
(1) and adjusting
link nuts (2),
and
move the air
pump
to the required position. Tighten the bolts
and
re-check the belt tension.
DO
NOT
OVERTIGHT
EN as this will impose an
excess loading on the drive bearings.
A ir
clea
n
er
The element of the air
pump
air cleaner must be renewed every 12,000 miles
Fig. 6 (20000 km.) or 12 months; more frequent change s may be necessary in dusty
operating conditions.
Unscrew the self-locking
nut
(1), withdraw the cover (2) and discard the element
(3). Clean the inside of the cover thoroughly and re-assemb le using a new
element.
MA
LFU N CTION
Visual
Checks
Driving
Symptoms
IDENTIFICATION
Check the following items regularly for visual signs of a malfunction and also
if any of the Dri ving Symptoms listed should persistently occur.
If
you are unable
to locate and/or correct the malfunction you are advised to contact your Austin
MG
Dealer immediately.
1. Condition
and
adjustment of drive belts.
2. Baked or overheated hose between air pump
and
check valve.
3. All hoses for securit y, damage
and
deterioration.
4. Fuel leakage.
5. Oil filler cap for sealing.
6. Fuel filler cap for sealing.
1. Violent backfire in exhaust system.
2. Hesitation to accelerate on re-opening the throttle after sudden throttle
closure.
3. Engine surges (erratic operation at varying throttle openings).
4. Engine idles erratically or stalls.
5. Noisy air pump.
6. Ignition warning light on above idle speed (slack or
broken
fan belt).
7. Smell of fuel vapours.
8. Engine stops after short running periods (fuel starvation).
9. Lack of power.
10. High fuel consumption.
11. Engine misfires (engine jerks on cruise
and
acceleration).
12. High temperature indicated (overheating of coolant).
Fig. 3
Fig. 4
Fir{. 5 Fig. 6
1
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~
·3~
2
4
~
i1
~
~
[5
J;;
3 \ '9\\
r-:::::::::::=:::
'
:::::
~:..---"l
" /
.
~
i
discard the old filter
pad
(6),
and
fit a new one. When refitting, ensure
that
all
connections to the canister are securely fitted.
Do
not
attempt to remove the
gauze or its retainer from inside the canister.
Fit a new canister every
48,000 miles or 48 months.
Gulp
valve
To renew, disconnect the hoses (1)
and
sensing pipe (1) from the gulp valve.
Fig. 4 Unscrew the mounting screws
and
nuts (2) and remove the gulp valve (3).
Fit
the new valve, re-connect the hoses
and
sensing pipe, ensurin g tha t all joints are
made
secure
and
airtight.
V is ual
C
hecks
Driving
Symptoms
~
1. Condition
and
adjustment of drive belts.
2. Baked or overheated hose between air pump
and
check valve.
3. All hoses for security, damage
and
deterioration.
4. Fuel leakage.
5. Oil filler cap for sealing.
6. Fuel filler cap for sealing.
1. Violent backfire in exhaust system.
2. Hesitation to accelerate on re-opening the throttle after sudden throttle
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