Service Procedures: MG B 1962-1974

Technical Reference

Member-uploaded diagrams & documents for this generation. AI-classified; community-verified where badged.

Service Procedures

• MGB Twin SU Carburetter Tuning - Initial Settings & Tuning Conditions (Page 428)
  This is page 428 (section 4-12, 'Engine Emission, Issue 3, 24062') of a British Leyland-style workshop manual covering twin SU carburetters, uploaded to a 1971 MG B gallery. The page shows a labeled illustration of a…
• MGB Carburetter Reassembly Steps 22-34 - Spring-Loaded Needle & Jet Setting
  This page (page 425, section 4-9) from an 'Engine Emission' workshop manual (Issue 4, ref. 18959) covers the final reassembly steps for SU-type carburetters. Steps 22-26 detail refitting spring-loaded jet needle…
• MGB Twin SU Carburetter Tuning & Balancing Procedure - Engine Emission Manual
  This is page 420 (section 4-4) of a British Leyland engine emission workshop manual section titled 'CARBURETTERS', covering the tuning and balancing procedure for twin SU carburetters. A note explains that on…
• MG B SU Carburetter Tuning & Twin Carburetter Adjustment - Engine Emission p419
  This is page 419 (section 4-3) of an 'Engine Emission' service manual (Issue 3, 12383) covering carburetter tuning procedures, uploaded to a 1971 MG B gallery. The page continues a single-carburetter tuning procedure…
• MGB Workshop Manual p134 - SU Carburetter Removal, Tuning & Float Level (D.4)
  This is page 134 (page D.12) from the MGB workshop manual, Section D, The Fuel System, covering SU carburetter service. It begins with Fig. D.11, showing how to check the nylon float level using a 1/8 to 3/16 in. (3.18…
• MGB Engine Manual p.80: Cylinder Head Refitting, Valve & Guide Replacement (A.7)
  This is page 80 (section A, 'The Engine') of an MG B workshop/service manual, covering completion of cylinder head refitting and the beginning of Section A.7, 'Valve Gear and Valves'. The cylinder head refitting…
• MGB Workshop Manual p77 - Rocker Bushes & Cylinder Head Removal, Fig A.2 Sequence
  This is page 77 of the MGB workshop manual ('THE ENGINE' section, page A.5, Issue 6, ref. 25729). It completes the rocker shaft assembly procedure (Section A.5), covering removal of the eight rocker shaft bracket nuts…
• 1971-1973 MGB Service Manual p39 - Transmission, Steering & General Data Specs
  This is page 39 of an MGB service/maintenance manual covering three sections: Transmission, Steering/Suspension, and General Data. The Transmission section explains checking gearbox oil via the combined filler/dipstick…
• Engine Emission page 4-14: setting throttle and jet interconnection levers, balancing at 1,500 r.p.m., mixture control wire and fast idle.
• Engine Emission page 4-13 on twin carburetter tuning: damper oil level, balancing meter use, jet nut-flats graph and CO reading check.
• Engine Emission page 4-11 on carburetter tuning: idle speed, jet adjusting nut setting by engine RPM, restrictor locking and CO check.
• Section 4-C carburetter tuning, complete: type HS carburetter key, initial setting, tuning conditions and piston damper top-up, page 426 (4-10).
• Carburetter suction chamber drop test, fixed and spring-loaded needle refit, and jet centring steps, page 424 (4-8).
• Carburetter throttle disc and spindle removal, then reassembly steps for all types covering float needle, float lever and piston, page 423 (4-7).
• Carburetter dismantling of the jet assembly, pick-up and cam levers, float-chamber and float needle seating, page 422 (4-6).
• MGB workshop manual page D.13 covering twin carburetter mixture adjustment, throttle clearance, jet centring, float-chamber level, flooding and needle sticking.
• Carburetter dismantling steps for all, fixed needle and spring-loaded needle types, plus Section 4-B servicing, page 421 (4-5).
• Section 4-A basic carburetter tuning for single carburetters, with a numbered type HS carburetter drawing, page 418 (scanned upside down).
• MGB lubrication diagram with 12 numbered points, weekly, 6,000-mile and 24,000-mile tasks, and editor's notes on cooling, brakes and ignition.