MG MGB TOURER GHN5 User manual

means ... . . .
* A new standard in car maintenance
* Highest quality cost-controlled work
* Competent operators following a
predetermined servicing schedule
It involves the use of efficient, modern methods
and equipment, eliminates guesswork and cuts
down servicing time. We don't plan to make
servicing more expensive, just more efficient.
Leycare follows a predetermined servicing se-
quence which must be rigidly followed by our
trained operators. There's no room for corner
cutting in Leycare.

TOURER (GHN5 and GHN4)
and GT (GHD5 and GHD4)
Handbook
Publication Part N3. AKD 7598 (8th Edition)
Includes a Supplement for Cars with Impact Absorbing Bumpers
Leyland Cars-Sales
Longbridge, Birmingham B31 2TB. England
Leyland Cars-Service
Cowley, Oxford OX4 2PG. England
1 BRITISH LEYLAND UK LIMITED 1976

FOREWORD
This Handbook introduces you to your British Leyland car. Your car is built
to a high standard of quality and reliability and with good driving, correct car
care andregular maintenance should give you carefreeand economicalmotoring.
The introductory pages cover the operation and function of the controls, switches
and general equipment fitted.
The main part of the Handbook gives detailed information on jacking, wheel
changing, bulb renewal, lubrication and the servicingprocedure of components.
Regular maintenance at the recommended intervals is essential to maintain your
car at the original standard of efficiency and you will find our detailed recom-
mendations under 'MAINTENANCE SUMMARY'. Those items which require
specialized equipment should be carried out by a Distributor or Dealer. Refer to
the 'GENERAL DATA' for information required during servicing and the day-
to-day running of the vehicle such as tyre pressures, oil capacities, etc.
Our Distributors and Dealers are trained and available to service your car for
you, and details of our maintenance scheme are included in your Passport
to
Service. Look for the Leycare Service sign.
References to right- or left-hand are made as if the car is being viewed from the
rear.

CONTENTS
INTRODUCTION TO THE CAR
CONTROLS
.. .. ..
INSTRUMENTS .. . .
.... SWITCHES . .
BODY FITTINGS . . ..
SEATS .. .... . .
...... SEAT BELTS
HEATING AND VENTlLATlNG
RUNNING INSTRUCTIONS
AUTOMATIC TRANSMISSION
CARE OF THE CAR
CLEANING
. . . .
COOLING SYSTEM . .
WHEELS AND TYRES
BRAKES
.... . .
ELECTRICAL . . ..
Wiring Diagrams ..
IGNITION .. . .
ENGINE . . .. . .
.... FUELSYSTEM
TRANSMISSION
..
STEERING/SUSPENSION
TUNING MODIFICATIONS
.... . . .. . . .... 78
GENERAL DATA .. .. . . . . . . . . . . .. 79
....
ROUTINE MAINTENANCE SUMMARY .. . . 82
.... .... SERVICE . . . . .. .. .. .. 84
LUBRICATION .... . . .. .. . . .. . . . . 86
SUPPLEMENT FOR EARLY CARS inchrding wiring diagrann .. 90
SUPPLEMENT FOR CARS WITH IMPACT ABSORBING BUMPERS
95
3

CONTROLS
Fig. I Synchromesh gearbox
Fig. 2 Automatic transmission
Gear lever
The gear positions are indicated on the lever knob. To engage reverse gear move
(1)
the lever to the left in the neutral position until resistance is felt, apply further
side pressure to overcome the resistance and then pull the lever back to engage
the gear. The reverse lights operate autoniatically when reverse is selected with
the ignition switched on.
Synchromesh engagement is prokidcd on all forward gears.
Selector lever The manual selection positions are indicated on the selector lever quadrant plate.
(2) Full driving instructions for cars fitted with a~~toniatictransmission are given on
page
3 1.
Hand brake
The hand brake is of the pull-LIPlever type, operating mechanically on the rear
(3)
wheels only. To release the hand brake pull the lever up 4ightly, depress the
button on the end of the lever and push the lever down.
Pedals The pedals are arranged in the conventional positions.
(4) (5) (7)
The brake pedal operates the brake hydraulic system and applies the brakes on
all four wheels, also bringing the stop uarning lights into operation when the
ignition is switched on.
Mixture To enrich the fuel air mixture and assist starting when the engine is cold, pull
control out the knob and turn a quarter of a turn clockwise to lock the control in the
(Choke) position selected. To release the control turn it in an anti-clockwise direction
and push it inwards.
DO NOT MOVE the control in or out whilst it is in the locked position. Notes
on setting the control are given on page
28.
* Sce 'RUNlrlING INSTRUCTIONS'.

Steering lock One type of steering lock (inset A) fitted to your car has the lock face marked
Fig. 3 either 'HALT', 'GARAGE', 'FAHRT', and 'START' or 'O', 'l', 'II', '111'.
These locks use a single entry type key and have 180" of key movement.
Alternative type (inset B). The lock face is marked 'O', '1'' 'II', '111'. This type
of lock has a double entry key and only 120" of key movement.
To lock the steering. Turn the key to the 'HALT' or '0' position and withdraw
the key. The steering lock is set during withdrawal of the key and rotation of
the steering-wheel engages the lock. When unlocking, turn the steering to assist
disengagement of the locking plunger.
Alternative type. Turn the key to the position marked 'I', press the key in and
while maintaining pressure turn anti-clockwise to position
'0' and withdraw
the key.
UNDER NO CIRCUMSTANCES MUST THE KEY BE MOVED FROM
THE 'I' POSITION TOWARDS THE
'0' POSITION WHEN THE CAR
IS IN MOTION.
GARAGE or
'1'. In this position the steering is unlocked and the ignition is
switched off. Accessory electrical items-heater blower motor, windscreen wipers
and radio-may be operated if desired. The car may be towed for recovery with
the key in the lock at position '1'.
'FAHRT' or '11'. Turn the key to this position to switch on the ignition; further
movement against spring resistance to the 'START' or '111' position engages
the starter. If the engine does not start, release the key and allow a short pause
before re-operating the starter.
WARNING.-The lock fitted to the steering-column works in conjunction and
is integral with the ignition starter switch. The designed operating sequence
prevents the engine being started with the steering LOCKED. Serious conse-
quences may result from alterations or substitutions of the ignition start switch
which would permit the engine to be started with the LOCK ENGAGED. Under
no circumstances must the ignition switch or the ignition-engine-start function
be separated from the steering lock.
DO NOT lubricate the steering lock/switch.
It is most important that OWNERS MAKE ANOTE OF THE KEY NUMBERS
IMMEDIATELY on taking delivery of the car. The key number is printed on
a label attached to windscreen. Consult your Distributor or Dealer regarding
steering lock key replacements.

INSTRUMENTS
INSTRUMENTS Fig. l
Speedometer In addition to recording the road speed this instrument also records the total
(1) distance (2), and the distance travelled in any particular trip (3). To reset the
trip recorder, turn the knob (4) anti-clockwise (on early cars push the knob
upwards and turn it clockwise); it is important that all the counters are returned
to zero.
Tachometer The instrument indicates the revolutions per minute of the engine and assists the
(5) driver to use the most effective engine speed range for maximum performance in
any gear.*
Oil pressure The gauge indicates the pressure of the oil in the engine lubrtcation \y\tem.*
gauge (6)
Temperature Nornlal operating temperature is reached when the pointer is in the 'N. sector.*
gauge (7)
Fuel gauge
When the ignition is switched on the fuel gauge needle moves slowly across the
(8)
scale, taking approximately 30 seconds to indicate the amount of fuel in the tank.*
See 'RUNNING INSTRUCTIONS'.

SWITCHES
Ignition and Steering lock fitted. The ignition and starter are both controlled by a switch
starter integral with the steering lock. The switch is,operated by the steering lock key.
Fig. 7 and 2
DO NOT lubricate the steering lock/switch.
To switch on the ignition, insert the key in the steering lock and turn to the
position marked 'FAHRT' or
'11'.
To operate the starter, turn the key against spring resistance to the 'START' or
'111' position. If the engine does not start, release the key and allow a short
pause before re-operating the starter.
Ignition warning light (red). The warning lamp
(1) fitted in the tachometer serves
the dual purpose of reminding the driver to switch off the ignition and of acting
as a no-charge indicator.*
Early cars
The ignition and starter are both controlled by a single switch operated by a
removable key. To switchon the ignition insert the key and turn it in a clockwise
direction until a slight resistance is felt. Further movement in the same direction
operates the starter motor. Release the key immediately the engine starts.
To operate the auxiliary electrical services when the car is parked without the
necessity of loading the ignition circuit or starting the engine, turn the ignition
key in an anti-clockwisedirection. The heater blower motor, windscreenwipers,
and the radio may then be operated by switching on the appropriate switch.
The key can only be withdrawn when the switch is in the 'off' position.
* See 'RUNNING INSTRUCTIONS'.
Fig. l Fig. 2

Switches
FASCIA SWITCHES Fig. 3
Lighting
switch
(1 )
Blower switch
and heater
controls
(2)
Fog and spot
lamp switch
(If fitted) (3)
Press the lower end of the switch rocker in to the first position to switch on the
sidelamps and fully in to switch on the headlamps.
For operating instructions see
'HEATING AND VENTILATING'.
The two lamps use one common switch which is provided with two positions as
follows:
To operate the fog lamp, press the lower end of the switch rocker to the first
position. The fog lamp will only illuminate when the headlamps are switched
to low beam, and will automatically extinguish when the headlamps are switched
to main beam.
To operate the spot lamp, press the switch rocker to the second position. The
lamp will only illuminate when the main headlamps are on high beam, and will
extinguish when the main headlamps are switched to low beam.

Windscreen With each depression of the control knob water is sprayed onto the windscreen.
washer When the windscreenis dirty the washer should be operated severaltimes before
(4) the wiper blades are set in motion.
Incold weather the washerreservoir should be filled with a mixture of water anda
recommended washersolventto prevent the water freezing. On no account should
radiator anti-freeze or methylated spirits (denatured alcohol) be used in the
windscreen washer.
Windscreen Press the lower end of the switch rocker in to the first position to operate the
wiper switch wipers at slow speed, and fully in to operate the wipers at high speed. The wiper
(5) blades park automatically when the switch is returned to the off position.
Panel lamp When the sidelamps are switched on the instruments may be illuminated by
(6) turning the switch knob clockwise. The initial movement of the knob switcheson
the panel lights; further turning dims them.
Overdrive The two positions 'NORMAL' and 'OVERDRIVE' are marked on the switch
(Iffitted) panel; for operating instructions see 'RUNNING INSTRUCTIONS'.
(7)

Switches
STEERING-COLUMN SWITCHES Fig. 4
Headlamp
With the headlamps switched on at the lighting switch, move the lever down ahay
beam
from the steering-wheel in the direction of arrow (2) to overate the headlamps'
(1 )
main beam. Lifting thelever from the low beam position (l), towards the steering-
wheel in the direction of arrow
(3), will flash the headlamp main beams irrespec-
tive of whether the headlamps are switched on at the lighting switch or not.
Beam dipping
The switch mounted on the toeboard adjacent to the clutch pedal lowers the
(early cars)
beams on one application and raises them on the next.
Warning light Headlamp main-beam. The light glows when the headlamps are switched on and
(blue) the beam is in the raised position. The light goes out when the beam is dipped.
(4)
Direction
The switch is self-cancelling and will operate the indicators only when the ignition
indicators
is switched on. Move the lever in the direction of arrow (5) to operate the left-
hand direction indicators and in the direction of arrow
(6) to operate the
right-hand indicators.
A visual warning of a front or rear bulb failure is given
when after switching on an indicator, the warning lamp and the serviceable bulb
on the affected side give a continuous light.
Warning light Direction indicator. The arrow-shaped lights show the direction selected and
(green) operate with the flashing direction indicators.
(7)
Horn The horn is sounded by pressing the centre disc of the steering-wheel.
Eurly GHNIGHD curs. Press the knob (1) on the end of the switch lever to
operate the horn.
Fig. 4

CENTRE CONSOLE SWITCHES Figs. 5 and 6
Courtesy lamp
(1 )
Cigar-lighter
(Iffitted) (3)
Heated rear
window (GT)
(Iffitted) (4)
Hazard
warning
(6)
The courtesy lamp is controlled by a switch (2) on the lamp and also by switches
operated by the doors. With both doors closed the lamp may be switched on or
off using the switch on the lamp. Opening either door switches on the lamp and
closing the door extinguishes it.
Early cars: The lamp is provided as a map light. Pull out the switch knob
to operate the lamp.The map light only operates when thesidelampsare switched
on and is not provided with door-operated switches.
Press the knob right in to heat the lighter element. When heated sufficiently, the
lighter unit will
be partially ejected and it is then ready to be withdrawn for
lighting purposes.
Press the lower end of the switch rocker
(4) to operate the heated rear window,
which will operate only when the ignition is switched on. The indicator light
(5)
glows as a reminder that the heater is operating.
Early cars. The electricallyheated back-light is controlled by a switch mounted
on the fascia panel in the position normally occupied by the heater blower switch,
the blower being repositioned on the under-side of the fascia panel below the
windscreen wiper switch. The heated back-light will operate only when the
ignition is switched on; an indicator lamp in the switch will glow when the
switch knob is pulled out to the 'on' position.
To use the direction indicators as hazard warning lights, press the lower end of
the switchrocker; all the direction indicators and the warning lamps will operate,
irrespectiveof whether the ignition is switched on or off.
Fig. 5 (7973model year)
Fig. 6 (7974 model year)

Switches
INTERIOR OR TAILGATE LAMP SWITCH
GT
The lamp mounted above the seats is controlled by a switch on the lamp and
also by a switch operated by the tailgate. The lamp lights as the tailgate is raised
and switches off as the tailgate is lowered.
On early
GT cars an interior lamp mounted above the seats is controlled by a
switchoneach door hinge post which operates as the doors are opened or closed.
A switch is also provided on the lamp for use when both doors are closed.

BODY FITTINGS
Keys
Two keys and a duplicate set are provided, the large key for the steering lock
and the ignition switch, and the small key for the front doors, glovebox and
luggage compartment.
To reduce the possibilityof theft, locks are not marked with a number. It is most
important that owners
MAKE A NOTE OF THE KEY NUMBERS IMMEDI-
ATELY
on taking delivervof thecarand at the same time consult the Distributor
or Dealer regard& steering lock key replacements.
Window
Turn the handle (1) on each door to open or close the windows.
regulators
Fig. 7
Door locks Both doors may be locked from the outside with the key or from the inside with
Fig. 7 the internal door handle.
To lock the doors from the outside insert the key in the lock and turn it slightly
towards the rear of the car. To unlock the doors turn the key slightly towards
the front of the car. Grasp the handle and depressthe button
(2) to open the door
which will be retained in the fully open position by the check strap.
After locking or unlocking the doors return the key to the vertical position and
withdraw it.
To lock the doors from inside the car, close the door and move the locking
latch
(3) towards the rear of the car. To open the doors move the locking latch
towards the front of the car and pull the release lever
(4) rearwards. The doors
can be opened from the outside when the locking latch is in the forward position.
The locking latch cannot be set to the lock position while the door is open.
Fig. l

Body Fittings
Glovebox To open, insert the key and turn it anti-clockwise. The glovebox door must be
Fig. 2 locked with the key to retain it in the closed position.
Luggage Tourer Fig. 3. To open, depress the lock plunger and raise the lid. When fully
compartment
raised the support stay will automatically spring into engagement and the lid
will be held in the open position. Opening the luggage compartment lid auto-
matically switches on the luggage compartment lamp.
To close the tourer luggagecompartment, raise the lid slightly,push the catch
(1)
on the support stay forward to release the locking mechanism, and lower the lid.
Closing the luggage compartment lid automatically switches off the luggage
compartment lamp.
GT Fig. 3. To open, depress the lock plunger and raise the tailgate. Springs
retain the tailgate in the open position. The interior lamp will automatically
switch on as the tailgate is raised and switch off when the tailgate is lowered.
Fig. 2 Fig. 3
Fig. 4

Bonnet To raise the bonnet, pull the knob (l)located inside the car on the left-hand side
Fig. 4 below the fascia panel. Press up the safety catch (2) under the front of the bonnet.
Raise the bonnet and when fully raised the support stay will automatically spring
into engagement and the bonnet wiH be held in the open position.
Toclose, raise the bonnet slightly, push the catch
(3) on the bonnet stay rearwards
to release the locking mechanism, and lower the bonnet. Apply light pressure
with the palms of the hands at the front corners of the bonnet and press down
quickly; undue force is not necessary and may cause damage. The safety catch
and lock will be heard to engage.
Heated rear The heated rear window has a heating element (arrowed) on the surface of the
window (GT) glass and with reasonable care will last indefinitely.
(Iffitted)
Fig.
5 The following practices will damage the circuit and must be avoided.
1. Scratching off labels and advertising stickers.
2. Wiping the glass with the back of a ringed hand.
3. Stowing hard and metal objects so that they abrade the glass.
4. Cleaning with harsh abrasives.
Increased To increase the luggage capacity the back of the rear seat can be folded down.
luggage area
(GT) Release the locks by moving the catch handles (1) downwards and moving the
Fig. 5 back of the seat (2) forward.
To return the seat to the normal position, lift the seat and lock in position by
moving the catch handles upwards.

Body Fittings
Mirrors Exterior (iffirted) Fig. 6. The mirror head can be adjusted from the seat position
when the window is open.
Interior Fig. 7. The mirror stem with anti-dazzle head is designed to break away
from the mounting bracket on impact. The stem may be refitted in the mounting
bracket as follows. Align the stem ball
(l) with the bracket cup (2) ensuring that
the small protrusion
(3) on the stem aligns with the indent of the mounting
bracket. Give the stem a smart tap with a soft instrument to join the two
components.
Anti-dazzle Fig. 7. To reduce interior mirror dazzle, press the lever (4) towards
the windscreen.
Arm-rest and
To gain access to the compartment below the arm-rest, raise the forward end
ashtray of the arm-rest. To empty the ashtray, raise the lid (1) and remove the ashtray
Fig. 8 by lifting under the stubber (2).
Donot attempt to remove the ashtray by pulling on the lid.
Fig. 6
FI~. 7
Fig. 8

Front
ventilator
windows
Fig. 9
To open, move the catch lever (1) upwards and push the window outwards.
To close, pull the catch inwards and then push it forward until the catch is in
the locked position.
Rear
ventilator
windows
Fig. 70
Body and door
drainage
points
Fig. 7 I
Fig. 9
To open, pull the catch (1) forward and then push the catch outwards.
To close, pull the centre of the catch inwards and then push it backwards until
the catch,snaps over into the locked position.
Periodic examination of the drain holes should be made to ensure that they
are clear of obstruction; use a piece of stiff wire to probe the apertures.
Careless application of underseal can result in restricted drainage. Masking tap
or plugs used when underseal is being applied must be removed immediately the
operation is completed.
Jacking up beneath the underfloor may deform the drain apertures; always use
the jacking points provided.
Fig. 10
Fig. l l

Body Fittings
Lowering the
hood
Fig. 12
Fig. 73
Fig. 14
It is most important that the instructions given for raising, lowering, and folding
the hood are followed.
Do not use undue force on the hood frame members. DO
not fold or stow the hood when it is wet or damp.
Release both windscreen frame toggle catches (1).
Release the two fasteners (2) on the windscreen rails, the two fasteners (3) on
the cant rails and the two fasteners
(4) on the hood mounting brackets.
Releasethe four fasteners from each rear quarter panel
(5) and pull the hood (6)
slightly forwards to disengage the hook (7) from the socket (8) on the body side
panel.
Move the seat tilt catch forward and incline the seat backs towards the front
of the car.
Raise the hood header rail
(11) until it is poised approximately midway over the
door aperture.
Disengage the hood rear rail from the anchor plates
(9) on the tonneau panel.
Fold each quarter-light
(10) onto the back-light and continue the fold in the
material forward to the header rail
(11). ENSURE THAT THE FOLD IS
MADE IN THE HOOD MATERIAL BETWEEN THE QUARTER-LIGHT
AND THE BACK-LIGHT. FAILURE TO DO THIS MAY CAUSE PER-
MANENT DAMAGE TO THE BACK-LIGHT MATERIAL.
Push the header rail (I I) rearwards and at the same time draw the back-light
and hood material
(12) out over the luggage compartment lid ensuring that the
hood material does not become trapped between the hood sticks.
Fia. 12
Fig. 73