MG MGB GT GHD4 Handbook Download Page 1

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Summary of Contents for MGB GT GHD4

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Page 2: ...dule 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...

Page 3: ...ook 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 OX...

Page 4: ...enance 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...

Page 5: ...N CARE O F THE CAR CLEANING COOLING SYSTEM WHEELS AND TYRES BRAKES ELECTRICAL Wiring Diagrams IGNITION ENGINE FUELSYSTEM TRANSMISSION STEERING SUSPENSION TUNING MODIFICATIONS 78 GENERAL DATA 79 ROUTIN...

Page 6: ...he hand brake is of the pull LIP lever 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...

Page 7: ...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...

Page 8: ...ter 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 i...

Page 9: ...f 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 switc...

Page 10: ...se 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 h...

Page 11: ...ed 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 spe...

Page 12: ...ched 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 indicato...

Page 13: ...o 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 a...

Page 14: ...erated 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 switch on each...

Page 15: ...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...

Page 16: ...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 t...

Page 17: ...amage 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 indefi...

Page 18: ...uring 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 int...

Page 19: ...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 obstr...

Page 20: ...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 apertu...

Page 21: ...the seat tilt catch forward and incline the seat hood backs towards the front of the car Raise the header rail l l and unfold the hood Engage the rear rail in the anchor plates 9 Pull the hood slightl...

Page 22: ...ail in the two anchor plates 17 on the tonneau panel Pull the cover slightly forwards and engage each side hook in its socket 18 on the body panel Secure the fasteners 19 at each quarter side panel Se...

Page 23: ...g Reverse the fitting procedure Hard top Fitting Remove the hood If fitted Fit the hard top side brackets into the support sockets and secure with the bolts and spring washers Position the hard top on...

Page 24: ...hard top quarter channel Adjust if necessary by loosening the side fixing bolts and repositioning the hard top Ensure that there is an adequate seal between the window and hard top rubber and that th...

Page 25: ...when the lever is released The rake of the back or squab of the seat may also be adjusted Ease the body weight from the seat back move the lever 2 in the direction of the arrow Release the lever and...

Page 26: ...ensure that the belt webbing is not twisted lift up the mag netic buckle tongue 8 and engage the hook 9 into the hinged part of the tongue To release later cars press the release button 5 on the shor...

Page 27: ...ents Hard braking or fast cornering of the car locks the seat belt reel Later cars ensure that while the belt is retracted the engagement tongue l has not moved on the belt to a point near the sill mo...

Page 28: ...he knob to the most forward position to close the vent Air distribution for heating is independent of the fresh air system The control knob 1 should be in the closed position when heated air is being...

Page 29: ...r distribution Booster fan Press the lower half of the rocker switch 3 down to switch on the air flow booster Usage The heater and air flow controls may be set at the position marked on the control kn...

Page 30: ...overfilled and the car is to be parked take care to park it in the shade with the filler intake as high as possible The fuel tank is vented through the filler cap UNIPART market a lockable filler cap...

Page 31: ...25 Ib sq in 7 to 1 7 kg cm at idling speed Should the gauge fail to register any pressure stop the engine immediately and investigate the cause Start by checking the oil level Research has proved tha...

Page 32: ...towing weight of 1 680lb 762 kg is the maximum that is permissible When using bottom gear a gradient of up to 1 in 8 can be ascended while towing a weight not exceeding this figure It may be necessar...

Page 33: ...lector lever quadrant plate Fig I The stop 1 provided between N and R is to minimize inadvertent selection of P or R while the car is moving To select P or R from any of the other positions move the l...

Page 34: ...red position This will prevent the car from creeping i a tendency for the car to move very slowly forward if D Ll or L2 is selected or backwards when R is selected This creeping feature can be used to...

Page 35: ...e Fig 2 maximum down change speeds are preset to give optimum performance without overspeeding the engine At speeds up to 30 m p h 48 km p h in top gear depression of the accelerator pedakwithin the l...

Page 36: ...r on salted roads In these conditions and with other forms of severecontan tion an additional washing overation is necessarv which should include under body hosing Any damage aieas should be irnmddiat...

Page 37: ...ed with a drain tap 2 and the engine with a drain plug 3 or tap 4 on the right hand side of the cylinder block When draining in freezingweather do so when the engine is hot Run the engine slowly for o...

Page 38: ...ontained in the cooling system to ensure that the correct type is used for topping up Anti freeze can remain in the cooling system for two years provided that the specific gravity of the coolant is ch...

Page 39: ...upport and safety while working Jack If the jack is neglected it may be difficult to use in a roadside emergency Examine maintenance it occasionally clean off accumulated dust and lightly oil the thre...

Page 40: ...be removed and fitted to the wheel in use Wire type Use the mallet to slacken the winged hub nut or the spanner to slacken the Removing and octagonal hub nut used refitting Fig 4 2 Always jack up a wh...

Page 41: ...ed and adjusted before use Unbalanced wheel and tyre assemblies may be responsible for abnormal wear of the tyres and vibration in the steering Consult your Distributor Dealer Radial ply tyres should...

Page 42: ...the pressure in warm tyres where the increase above the normal pressure is die to temperature See that the valve caps are screwed down firmly by hand The cap prevents the entry of dirt into the valve...

Page 43: ...ch must be checked and the leak rectified immediately Before refitting the filler caps separate the dome 3 from the filler cap and check that the breather holes indicated by the arrows are clear Snap...

Page 44: ...release the hand brake Jack up each wheel in turn brake linings placing suitable supports beneath the vehicle see WARNING on page 37 Fig 4 Remove the road wheel and slacken the brake shoe adjuster Rem...

Page 45: ...your Distributor or Dealer Lubrication Charge the nipple on the hand brake cable with one of the recommended Fig 5 greases Servo filter The filter should be cleaned at the recommended intervals with...

Page 46: ...id seals in the hydraulic system should be renewed and all flexible hoses should be examined and renewed if necessary every 3 years or 36 000 miles 60000 km whichever is the sooner At the same time th...

Page 47: ...the grip at the centre of the cover l this will ensure that the filling valves are operated correctly If no electrolyte is visible inside the battery pour distilled water into the filling trough until...

Page 48: ...bles are connected between the battery terminals in the following order first positive to positive and then negative to negative the engine speed is reduced to 1 000 r p m or below before disconnectin...

Page 49: ...amp continuous current rated 35 amp blow rated line fuse 8 protects the hazard warning lamps and is located behind the hazard warning switch It is accessible only when the centre console is withdrawn...

Page 50: ...duced The method of gaining access to the light unit for replacement is the same for both types The different types of bulbs and holders are shown in Fig 5 Removing Ease the bottom of the outer rim 1...

Page 51: ...outer edge of the light unit in the slots formed in the lamp body and refit the inner rim and its retaining screws Position the outer rim on the retaining lugs at the top of the lamp and press the ri...

Page 52: ...and nuts remove the lamp hood 1 Fig 9 and lift off the lens 2 When refitting the lens on later cars check that the lens is pushed into the gasket 3 Ensure that the wedge shaped gasket 3 on later cars...

Page 53: ...stoon type bulb from the retaining clips Luggage The lens is held in the lamp by four locating lugs To gain access to the bulb compartment gently squeeze the sides of the lens together and withdraw it...

Page 54: ...ulb holder 7 from the lamp and unscrew the bulb 8 Cigar lighter illumination bulb iffitted A bulb with bayonet fixing Withdraw the centre console Squeeze the sides of the bulb hood 9 and remove the ho...

Page 55: ...Sweden and West Germany Main beam all markets except North America Sweden and West Germany Main beam North America Sweden and West Germany Direction indicator warning lamp Brake warning lamp North Am...

Page 56: ...er withdraw the retaining rubber stop from one end of the blade and slide the rubber from the retaining clips Plain fastener type Fig 16 Pull the wiper arm away from the windscreen press down the arm...

Page 57: ...djust the height of the spray The spray should strike the top of the windscreen ALTERNATOR The following precautions must be observed to prevent inadvertent damage to the alternator and its control eq...

Page 58: ...Ignitionlstarter switch Ignition coil 40 Distributor 41 Fuel pump 43 Oil pressure gauge 44 Ignition warning lamp 45 Headlamp flasher switch 46 Coolant temperature gauge 49 Reverse lamp switch 50 Reve...

Page 59: ...WIRING DIAGRAM 1973 74...

Page 60: ...WIRING DIAGRAM 1972 73 Refer to page 56 for key...

Page 61: ...WIRING DIAGRAM 1971 72 Refer to page 56 for key...

Page 62: ...WERING DIAGRAM 1970 71 Refer to page 56 for key...

Page 63: ...Wiring Diagram 1969 70 Refer to page 56 for key...

Page 64: ...centre of the cam spindle do not remove this screw as clearance is provided for oil to pass Avoid over lubricating Carefully wipe away all surplus lubricant and see that the contact breaker points ar...

Page 65: ...replaced by the correct type of ignition cable Sparking plugs The sparking plugs should be cleaned preferably with an air blast service unit Fig 2 Check the plug gaps and reset if necessary to the rec...

Page 66: ...ilter for the closed circuit crankcase breathing intake The oil level should always be checked before a long journey Draining To drain the engine oil remove the drain plug 3 located on the right hand...

Page 67: ...out the casing with petrol gasoline dry it before fitting a new element Check that the sealing rings 3 and 5 and the rubber washer 4 are in a satisfactory condition Reassemble the filter ensuring tha...

Page 68: ...RTENSION as this will impose an excess loading on the drive bearings and stretch the belt VALVE ROCKER CLEARANCE Checking Remove the rocker cover and insert a 015 in 38 mm feeler gauge between Fig 5 t...

Page 69: ...he oil filler cap If the valve is functioning correctly the engine speed will rise slightly as the cap is removed the change in speed being audibly noticeable If no change in speed occurs renew the va...

Page 70: ...y into the reservoir Accelerator Lubricate the carburetter accelerator and choke linkages and cables and the accelerator pedal fulcrum Carburetter The efficientoperation of theengine and any exhaust e...

Page 71: ...e balance is not correct adjust by tuning the throttle adjusting screw 4 on one of the carburetters Then adjust the idle speed by turning the throttle adjusting screw 4 on each carburetter by the same...

Page 72: ...otion pick up lever in turn until the tag of the lever rests on the lower arm of the carburetter throttle fork Tighten the clamping bolts 7 Fig 4 on each fork ensuring that there is approximately in 0...

Page 73: ...and the accelerator pedal fulcrum Carburetter The efficient operation of the engine and any exhaust emissioncontrol equipment tuning which may be fitted depends on correct carburetter settings ignitio...

Page 74: ...s 8 Increase the engine speed to 2 500 r p m for thirty seconds NOTE Tuning can now be commenced If delay prevents the adjustment being completed within three minutes increase the engine speed to 2 50...

Page 75: ...st as necessary with the throttle adjusting screws 16 Set the throttle interconnection clamping levers so that the link pin is 012 in away from the lower edge of the forks see inset 10 as follows 17 S...

Page 76: ...m the filter body Slacken the hose clips and remove carburetter feed hose 2 and fuel tank Fig 8 delivery hose 3 from the filter 4 and discard the filter Fit the hoses to the new filter ensuring that t...

Page 77: ...pstick OVERDRIVE Draining Remove the plug 3 to drain the oil from the gearbox and overdrive unit Sump filter Drain the gearbox and overdrive unit Clean the sump cover and its immediate surroundings Re...

Page 78: ...tick withdraw it again immediately and check the fluid level indication The level must be maintained at the MAX mark The difference between the MAX and MIN marks on the dipstick is equivalent to l pin...

Page 79: ...A is fa in 1 6 mm to A in 2 4 mm toe in less than the distance B Wheel alignment requires the use of a special gauge and this work should be entrusted to your Distributor or Dealer SUSPENSION Lubricat...

Page 80: ...s Before a car is super tuned or modified it is the owner s responsibility to ensure that the proposed alterations and additions are either approved by the appropriate authority for use on the road or...

Page 81: ...Engine Type 18V 779F and 18V 780F Early cars 18V 581F 18V 582F and 18V 583F 18V 581Y 18V 582Y and 18V 583Y 18GG and 18GD Bore 3 16 in 80 26 mm Stroke 3 5 in 89 mm 4 1798 C C 109 8 cu in 1 Firing orde...

Page 82: ...ear axle Dimensions Length Length with over riders Width Height hood erected Ground clearance minimum Track Front Rear Wheelbase Turning circle kerb to kerb Toe in 0 82 1 13 45 1 8 47 1 Overdrive 5 4...

Page 83: ...r sustained speeds at or near the maximum the above tyre pressures are increased by 6 Ib sq in 42 kg m Tourer t 24 Ib sq in 1 69 kg cma 26 Ib sq in 1 83 kg cm2 2 347 lb 1065 kg Tyre size 165SR 14 Pres...

Page 84: ...n A at 6 000 mile 10000 km or 6 month intervals B at 12 000 mile 20000 km or 12 monthintervals Items included in the 3 000 mile 5000 km or 3 month interval Inspection Check are indicated in column C E...

Page 85: ...ions Checkladjust headlamp alignment 48 Check if necessary renew windscreen wiper blades 54 WHEELS AND TYRES I X X X X X EXHAUST FUEL AND CLUTCH PIPES Check visually fuel and clutch pipes and unions f...

Page 86: ...ts and accessories are designed and and tested for your vehicle and have the full backing of the British Leyland accessories Owner s Service Statement ONLY WHEN GENUINE BRITISH LEYLAND AND UNIPART PAR...

Page 87: ...ibutors and Dealers The tool kit kit in a waterproof roll contains the following tools 8 combination spanners 1 adjustable spanner 2 pairs pliers 2 screwdrivers 1 feeler gauge set This kit can be supp...

Page 88: ...se the corrosive acids formed by combustion and also prevent the formation of sludge which can block oilways Additional oil additives should not be used Servicing intervals must be adhered to Engine U...

Page 89: ...l l Mobil SW120 I HD90 I HD8O I MP or MS Upperlube ATF 210 All temperatures below 10 C 15 F Esso Extra Motor Oil SW120 MIL G21OSB Castrol Hypoy B 90 All conditions Gear Oil GX 90 140 BP Super Visco St...

Page 90: ...Lubrication 1 IND 2316...

Page 91: ...AXLE Check oil level and top up if necessary g GEARBOX AND OVERDRIVE Check oil level and top up if necessary 9 AUTOMATIC TRANSMISSION Check fluid level and top up if necessary 10 FRONT SUSPENSION 6 n...

Page 92: ...ar quarter panel and pull each hood quarter light slightly forward to disengage the retaining clips from the sockets on the body side panels Fig 2 Slide the rear edge of the hood backwards to clear th...

Page 93: ...Release the windscreen frame toggle catches inset Fig 5 Release the four fasteners from each rear quarter panel pull the hood slightly forward to disengage the clips from the sockets on the body side...

Page 94: ...el and unfold the quarler lights Engage the hood rear rail with the slotted anchor plates on the tonneau panel Engage the hood quarter light clips in their retaining sockets on the body side panels Mo...

Page 95: ...From Car No GHN4 158371 Tourer and from Car No GHD4 158231 GT Refer to page 56 for key...

Page 96: ...Supplement for Early Cars EARLY CARS Refer to page 56 for key...

Page 97: ...Console switches Steering column switches INSTRUMENTS AND WARNING LAMPS Instruments Warning lamps ELECTRICAL Battery Headlamps Pilot lamp Direction indicator lamp Number plate lamp Panel and warning...

Page 98: ...e button on the end of the lever and u s h the lever down Pedals The brake pedal operates the brake hydraulic system and applies the brakes on all 3 4 5 four wheels The brake stop warning lights funct...

Page 99: ...ched off and the steering lock disengaged The heater blower motor windscreen wipers washers and the radio may be operated with the key in this position The key must be in this position when towing the...

Page 100: ...the switch rocker to the first position to switch on the side 2 and tail lamps and to the second position to switch on the headlamps Panel With the side lamps switched on illumination of the instrume...

Page 101: ...s the lower end of the switch rocker all the direction indicators and the warning lamps will operate together irrespective of whether the ignition is switched on or off To operate press the lighter kn...

Page 102: ...k automatically when the switch lever is returned to the off position Move the lever towards the steering wheel to engage overdrive move the lever away from the steering wheelto return to direct drive...

Page 103: ...stance the car has travelled 6 and the distance travelled for any particular trip 4 To reset the trip recorder turn the knob 5 anti clockwise it is im portant that all the counters are returned to zer...

Page 104: ...d Blue 9 Direction The arrow shaped lamps operate with the flashing direction indicators and show indicators the direction selected Green 10 Ignition Red The ignition warning light serves the dual pur...

Page 105: ...ctrolyte is visible inside the battery pour distilled water into the filling trough 4 until the six tubes 5 and the connecting trough 6 are filled Refit the vent cover The above operations should not...

Page 106: ...w the light unit 4 and disconnect the three pin plug 5 Refitting Connect the three pin plug and position the light unit in the headlamp body ensuring that the three lugs formed on the outer edge of th...

Page 107: ...n To gain access to the direction indicator bulb unscrew the two retaining screws indicator 2 and withdraw lens 1 Fig 9 Number plate Slacken the screw l remove the metal cover 2 and glass lens 3 Press...

Page 108: ...nts and unscrew the bulb 2 Warning lamp bulbs A 2 watt miniature bayonet fixing bulbs Remove the push fit bulb holders 3 from the lamps and remove the bulbs 4 Volts Watts Replacement Pilot lamps caple...

Page 109: ...and see that the contact breaker points are perfectly clean and dry Contact gap Turn the crankshaft until the points are fully open Check the contact gap 2 with a feeler gauge see GENERAL DATA the ga...

Page 110: ...500 miles 800 km During this period the heel of the contact will have bedded in and reduced the gap GENERAL DATA Engine Type 18V 846F Standard 18V 847F Overdrive Idle speed 750 r p m Fast idle speed 1...

Page 111: ...t including driver and passenger Maximum weight condition refer to note below S i z e Type 165SR 14 Radlal ply Tourer 1 GT 1Tourer 1 GT 1Tourer 1 GT 2 394 lb 2 446 lb 1 216 lb 1 198 lb 1 178 lb 1 248...

Page 112: ...Supplement for Cars with Impact absorbing Bumpers...

Page 113: ...switch 39 Ignition coil 40 Distributor 41 Fuel pump 43 Oil pressure gauge 44 Ignition warning lamp 45 Headlamp flasher switch 46 Coolant temperature gauge 47 Coolant temperature transmitter 49 Revers...

Page 114: ...and specificationsas the partson many newcars And they ll fit almost any car S o nexttimeyour car needs anew part whether you re fitting ityourselfor takingitto agarage makesure it s fittedwith Unipar...

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Summary of Contents for MGB GT GHD4

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MG MGB GT GHD4, Handbook, Page: 1 / 114

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Summary of Contents for MGB GT GHD4

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