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MG Workshop Manual

MG are a Brit automotive marque subscribed because of the defunct MG vehicle business brief, a Brit sports vehicle maker started into the 1920s as a business marketing sideline within W R Morris's Oxford city retail selling and provider business

because of the company's supervisor, Cecil Kimber. Best-known for its two-seat open activities automobiles, MG also created saloons and coupés. Kimber ended up being a worker of William Morris; MG are the initials for Morris Garages.

The MG business ended up being Morris's individual belongings until 1 July 1935 as he offered MG to his holding providers, Morris Motors brief, restructuring their holdings before issuing shares in Morris Motors into general public in 1936. MG underwent numerous changes in ownership you start with Morris merging with Austin when you look at the Brit engine Corporation brief in 1952. MG became the MG Division of BMC in 1967 and so a factor associated with the 1968 merger that produced British Leyland engine Corporation. Because of the start of 2000 MG had been part of the MG Rover Group which registered receivership in 2005 and also the possessions therefore the MG brand name had been bought by Nanjing car Group for GB£53 million. Manufacturing restarted in 2007 in China, and later at Longbridge plant in the UK underneath the existing manufacturer MG engine. The very first all-new model from MG in the united kingdom for 16 years, the MG 6, ended up being officially launched on 26 June 2011.

The original MG marque was in continuous utilize, excluding the extent associated with Second World War, for 56 ages after its beginning in 1923. The production of predominantly two-seater sports vehicles ended up being focused at a factory in Abingdon, some 10 kilometers south of Oxford. The Brit Motor firm competition department has also been situated during the Abingdon plant, producing numerous winning rally and cars, until the Abingdon factory closed and MGB manufacturing ceased inside Autumn of 1980.

Between 1982 and 1991, the MG marque always badge-engineer sportier versions of Austin Rover's Metro, Maestro, and Montego ranges. The MG marque had not been revived in its very own right until 1992, utilizing the MG RV8 – an updated MGB Roadster with a Rover V8 motor, that has been previewed on 1992 Birmingham Motor Show, with low-volume manufacturing commencing in 1993.

Another revival arrived in the summertime of 1995, whenever high-volume MG F two-seater roadster was launched.

The MG marque, combined with Rover marque, decided to go to the MG Rover group in-may 2000, when BMW "broke up" the Rover team. This arrangement have the return of MG badges on sportier Rover-based cars including the MG ZT in 2001, along side a modified MG F design, referred to as MG TF, established in 2002; but all production ceased in April 2005 whenever MG Rover moved into management.

The possessions of MG Rover are purchased by Chinese carmaker Nanjing car in July 2005, afterwards purchased by SAIC in December 2007, which now operate a British subsidiary, MG Motor.

The first design, the 1924 MG 14/28 consisted of a sporting human anatomy on a Morris Oxford framework. This car model carried on through a number of versions following the updates to your Morris. The first vehicle which can be referred to as a fresh MG, versus a modified Morris was the MG 18/80 of 1928 which have a purpose created chassis therefore the earliest appearance for the traditional straight MG grille. A smaller sized vehicle premiered in 1929 aided by the firstly an extended type of Midgets starting with the M-Type centered on a 1928 Morris mild framework. MG established a name for itself during the early times of the game of intercontinental car rushing. Starting before and continuing after globe War II, MG created a line of cars known as the T-Series Midgets which, post-war, are exported worldwide, achieving greater profits than anticipated. These included the MG TC, MG TD, and MG TF, all of which had been on the basis of the pre-war MG TB, and updated with every consecutive design.

MG departed from its early in the day type of Y-Type saloons and pre-war styles and circulated the MGA in 1955. The MGB was launched in 1962 to meet interest in an even more modern and comfortable low rider. In 1965 the fixed-head coupé followed: the MGB GT. With consistent news, mostly to conform to increasingly stringent United States emissions and security requirements, the MGB ended up being produced until 1980. Between 1967 and 1969 a short-lived design labeled as the MGC was released. The MGC ended up being on the basis of the MGB system, but with a bigger six-cylinder engine, and significantly worse maneuvering. MG also began making the MG Midget in 1961. The Midget had been a re-badged and somewhat restyled second-generation Austin-Healey Sprite. Towards dismay of numerous enthusiasts, the 1974 MGB ended up being the past design made out of chrome bumpers because latest US safety laws; the 1974½ bore thick black colored rubberized bumpers that some stated ruined the outlines for the vehicle. In 1973, the MGB GT V8 was launched utilizing the ex-Buick Rover V8 system and had been built until 1976. As with the MGB, the Midget build ended up being regularly modified through to the Abingdon factory closed-in October 1980 while the last of number was made. The badge was also placed on variations of BMC saloons like the BMC ADO16, that was in addition readily available as a Riley, but with the MG pitched as slightly even more "sporty".

The marque resided on after 1980 under BL, being used on many Austin saloons such as the Metro, Maestro, and Montego. In unique Zealand, the MG badge also made an appearance in the late 1980s Montego property, labeled as the MG 2.0 Si truck. There is a quick competitive record with a mid-engined, six-cylinder version of the Metro. The MG Metro complete manufacturing in 1990 in the release of a Rover-only design. The MG Maestro and MG Montego stayed for sale until 1991, when production of these versions was pruned in purchase for Rover to concentrate on the more contemporary 200 Series and 400 Series. Powerful Rover Metro, 200 and 400 GTi models had opted available for sale in belated 1989 and throughout 1990 whilst the MG version of the Metro was discontinued in 1990 and variations associated with the Maestro and Montego had been axed in 1991.

The Rover team revived the two-seater aided by the MG RV8 in 1992. The all-new MGF continued purchase in 1995, becoming the first mass-produced "real" MG sports vehicle since the MGB stopped manufacturing in 1980.

After the May 2000 acquisition associated with MG and Rover brands by the Phoenix Consortium additionally the forming of this new MG Rover team, the MG number ended up being broadened during summer of 2001 with the introduction of three activities products based on the contemporary range of Rover automobiles. The MG ZR had been on the basis of the Rover 25, the MG ZS in the Rover 45, and the MG ZT/ZT-T from the Rover 75.

The MG Rover team bought Qvale, which had bought out development of the De Tomaso Bigua. This car, renamed the Qvale Mangusta and already accepted for sale in the United States, created the cornerstone of MG XPower SV, an "extreme" V8-engined low rider. It was disclosed in 2002 and proceeded sale in 2004.

The MGB was a two-door sports car made and marketed because of the British engine organization, later on Uk Leyland, as a four-cylinder, soft-top roadster from 1962 until 1980. Variations are the MGB GT three-door 2+2 coupé, the six-cylinder roadster and coupé MGC, additionally the eight-cylinder 2+2 coupé, the MGB GT V8.

Replacing the MGA in 1962, production of the MGB and its alternatives continuing until 1980, achieving selling for MGB, MGC and MGB GT V8 blended of 523,836 automobiles. The MGB bodyshell is reprised in modified form with a limited run of 2,000 MG RV8 roadsters.

Motor: All MGBs used the BMC B-Series system. This engine is essentially an enlarged version of that used within the MGA with displacement being increasing from 1622 cc to 1798 cc. The sooner cars utilized a three primary bearing crankshaft, 18G-series. In February 1964 positive crank-case respiration was introduced and system prefix altered to 18GA, until October 1964, whenever a five-bearing crankshaft build ended up being introduced, engine prefix became 18GB. Horse power ended up being ranked at 95net bhp on both 5 main bearing and early in the day 3-bearing automobiles with peak power coming at 5400 rpm with a 6000 rpm redline. Torque output on MGB had a peak of 110 lb·ft gas consumption had been around 25mpg. US requirements automobiles spotted energy fall in 1968 with all the introduction of emission criteria as well as the using air or smog pumps. In 1971 UK spec automobiles nonetheless have 95 bhp at 5,500 rpm, with 105 lb·ft torque at 2500 rpm. System prefix became 18V in addition to SU carburettor needles are altered for reasons of the latest emission laws, under ECE15. By 1973 it was 94 bhp; by 1974 it was 87, with 103 lb·ft torque; by 1975 it was 85 with 100 lb·ft. Some California specification automobiles produced just around 70 hp because of the late 1970s. The compression proportion was also decreased from 9 to 1 to 8:1 on United States spec automobiles in 1972.

Carburation: All MGBs from 1963 to 1974 put twin 1.5-inch SU carburettors. United States spec automobiles from 1975 made use of a single Stromberg 1.75-inch carburettor mounted on a combination intake–exhaust manifold. This considerably reduced energy in addition to producing longevity problems due to the fact catalytic converter had a tendency to crack the intake–exhaust manifold. All MGBs made use of a SU-built electric gas pump.

Gearbox:: All MGBs from 1962 to 1967 made use of a four-speed handbook gearbox with a non-synchromesh, straight-cut very first equipment. Optional overdrive ended up being offered. This gearbox had been based on which used within the MGA with a few minor improvements to cope with the excess result of the larger MGB motor. In 1968 early gearbox was replaced by a complete synchromesh product based on the MGC gearbox. This device had been made to handle the 150net bhp of 3-litre system associated with MGC and is thus over-engineered when mated aided by the standard MGB B-Series motor. Actually, similar transmission was even found in the 3.5-litre V-8 type of the MGB-GT-V8. A computerized three-speed transmission has also been supplied as a factory solution, but turned out to be fairly unpopular.

Electrically involved overdrive gearboxes are a readily available option on all MGBs. The overdrive device had been operational in third and 4th gears but the overall proportion in third equipment overdrive is approximately just like fourth gear direct. The overdrive product had been engaged by a toggle change situated on the dashboard. The switch ended up being moved to the top the gearshift knob in 1977. Overdrives are fitted to lower than 20percent of all MGBs, which makes it a rather desirable function.

There have been three several types of overdrive transmissions fitted to the MGB.

1962–1964, 1965–1967

Laycock Means D OD
a gap within the bell housing where in actuality the starter nose pokes through
"Shield" shaped access cover
1020 TPM for OD and 1040 TPM for non-OD

Note: The gearbox input shaft, flywheel and engine backing dish had been altered using advent regarding the 5 biggest bearing engine in 1965. Consequently, the transmission for a 3 main bearing motor differs from its subsequent equivalent.

1968 through 1974.5

Laycock Kind LH OD
Rectangular formed access cover
Oval clutch fork boot
Dipstick
Black label regarding OD solenoid address stamped "22/61972"
1280 TPM for OD and non-OD
Speedometer drive equipment is blue
Speedometer driven equipment try white with 21 teeth



1974.5 through 1980

Laycock Kind LH OD
Rectangular formed accessibility cover
Square clutch fork boot
Part fill plug
Azure label in the OD solenoid address stamped "22/62005"
1000 TPM for OD and non-OD
Speedometer drive equipment are red
Speedometer driven gear are purple with 20 teeth

Note: Overdrive runs in 4th gear only in models produced from February 1977 onward.
A sectioned MGB showing a corner axle and differential

Back axle: Early MGBs made use of the "banjo" type differential transported more than from the MGA using the back axle proportion decreased through the MGA's 4.1 to 3.9 to at least one. wheels.) MGB GTs first began using a tube-type rear axle in 1967. This device was considerably stronger getting, like subsequent gearbox, designed for the three-litre MGC. All MGBs utilized the tube-type axle from 1968.

Brake system: All MGBs are fitted with 11-inch solid disc brakes on the front with drum brake system regarding back. The front brake calipers are manufactured by Girling and used two pistons per caliper. The braking system system regarding MGB GT ended up being the same as the Roadster except for a little larger backside braking system cylinders. A single-circuit hydraulic system had been utilized before 1968 whenever dual-circuit had been setup on all MGBs to conform to US regulations. Servo aid wasn't standard until 1975. Most modern-day and modern testers need commented in the most hefty brake pedal pressure had a need to stop the non-servo-assisted vehicles.

Electrical system: The MGB in the beginning had a very easy electric program. Dash-mounted toggle switches managed the lights, ventilation fan, and wipers with just the movement indicators being installed on a stalk regarding the steering line. The ignition turn has also been attached to the dash. Like MGA, the MGB applied two 6-volt batteries wired in series to offer a 12-volt good world setup. The electric batteries are placed directly under a scuttle panel behind the seats making accessibility some challenging however the location provided exemplary fat circulation and thus enhanced maneuvering. The asking program used a Lucas dynamo. Later on MGBs have considerable modifications toward electrical system including the use of a single twelve-volt electric battery, an alteration from positive to bad planet, safety-type toggle switches, an alternator in the place of the dynamo, additional warning lighting and buzzers, and having most frequent functions moved to steering line stalks.

Tyres: whenever leaving the factory, all non-V8 MGBs were originally fitted with Pirelli Cinturato tyres. Cross-ply tyres had been standard until 1972 with radials being recommended. From 1972 there have been two different radial sizes factory suited to brand new vehicles, depending perhaps the vehicle had been a roadster, or a GT,. Because of the 1974.5 arrival for the rubberized bumper automobiles the factory installed tyre dimensions had been simplified to 165/80x14 for many vehicles, irrespective of whether the automobile ended up being a Roadster or a GT, and irrespective of the wheel kind. In the future through the rubberized bumper production period, alloy tires had been launched on various minimal version brands - with the final a thousand LE systems becoming the last automobiles to go out of the Factory with alloy rims which, although the same 5”x14” rim size due to the fact RoStyle, had 185/70x14 radials fitted. This wider tyre was not factory fitted to wire tires. The factory built V8s had been installed with full profile 175HR14 tyres.

The roadster was the initial associated with MGB number becoming created. The human body ended up being a pure two-seater but a tiny back chair ended up being an uncommon option at one-point. By making better use of area the MGB could provide additional traveler and luggage rooms compared to the early in the day MGA while 3 ins smaller total. The suspension was also softer, offering a smoother ride, and the larger system provided a slightly greater top rate. The four-speed gearbox was an uprated version of the main one used in the MGA with an optional overdrive transmission. Wheel diameter fallen from 15 to 14 ins.

In late 1967, enough adjustment had been introduced the factory to establish a level II design for 1968 model season. Changes included synchromesh on all 4 gears with revised ratios, an optional Borg-Warner automatic gearbox, a new back axle, and an alternator rather than the dynamo with a change to a bad planet program. To accommodate the new gearboxes there were considerable modifications to the sheet material in floorpan, and a fresh flat-topped transmission tunnel.

To meet up United States safety laws, later on us tourers got three windscreen wipers rather than just two, and in addition got a plastic and foam-rubber covered "protection" dashboard, dubbed the "Abingdon pillow". Other areas carried on because of the steel dashboard. Rubery Owen ROstyle tires were launched to displace the earlier pushed metallic models in 1969 and reclining seats had been standardised. 1970 in addition saw a brand new front grille, recessed, in black aluminum. The greater traditional-looking polished grille returned in 1973 with a black "honeycomb" insert. In the united states, 1970 spotted split backside bumpers with all the number-plate between, 1971-74 returned to the sooner single piece full length design chrome bumper.

Further alterations in 1972 were into the indoor with a brand new fascia.

To generally meet effects laws, 1974 people designs spotted the chrome bumper over-riders changed with oversized plastic people, nicknamed "Sabrinas" after the well-endowed British actress. Inside second half of 1974 the chrome bumpers were replaced altogether, that are considered 1974.5 versions. A new, steel-reinforced black plastic bumper in front incorporated the grille area and, giving a significant restyling on B's nose, and a matching rear bumper finished the alteration.

Unique US headlight level laws furthermore intended the headlamps had been now too reasonable. In place of redesign leading associated with automobile, British Leyland increased the vehicle's suspension system by 1-inch. This, in conjunction with the brand new, far heavy bumpers resulted in considerably poorer management. For 1975 model 12 months only, the front anti-roll club ended up being deleted as a cost-saving measure. The destruction done-by the British Leyland reaction to people legislation ended up being partially alleviated by changes towards the suspension geometry in 1977, whenever a rear anti-roll club is made standard products on all versions. United States emissions regulations furthermore paid off horse power.

In March 1979 British Leyland began the production of black colored painted limited version MGB roadsters the US market, intended for an overall total of 500 instances. Because of a higher demand associated with the limited version model, production finished with 6682 instances. The uk got bronze decorated roadsters and a silver GT design minimal editions. Manufacturing run of homemarket limited edition MGBs was separated between 421 roadsters and 579 GTs.

The last MGB Roadster off the production line at Abingdon returned to Abingdon County hallway Museum on 1 December 2011 by using British engine Heritage. It had been raised up 30 legs through a first flooring screen regarding the quality We listed creating with inches to spare and from now on sorts part of the range on show in the main gallery.

Focus on a successor for the MGB was indeed undertaken so long back as 1968, but British Leyland had drawn the connect on that venture by the end of 1970. Whenever Abingdon factory eventually closed-in the autumn of 1980, British Leyland did not change it.