The following data is presented in good faith based on information from various sources. However, no guarantee or warranty is given to the accuracy of the above information. You are advised to verify the correctness of these specifications prior to using them. Use of these specifications assumes agreement with the disclaimer below. They are provided as a convenience to fellow enthusiasts and the author makes no expressed warranty to their accuracy, use at your own risk.
| Quick Reference | MGB Model Year 1965-1970 |
|---|---|
| Vehicle Number Location | |
| Body Number Location | Top left-hand side if the front bulkhead |
| Engine Number Location | Metal plate right-hand side of cylinder block |
| Gearbox Number Location | Top of gearbox, left of dipstick and filler plug |
| Rear Axle Number Location | Front of left-hand axle tube by spring seat |
| Tune Up | |
| Engine Firing Order | 1, 3, 4, 2 |
| Valve Rocker Clearance | .015 in (.38 mm ) cold |
| Idle Speed | 500 rpm |
| Static Ignition Timing | 10° BTDC (HC), 8° BTDC (LC) |
| Dynamic Ignition Timing | 14° BTDC @ 600 rpm |
| Timing Mark Location | Notch on crankshaft pulley, pointers on timing chain cover |
| Distributor Make/Type | Lucas 25D |
| Contact Breaker (points) Gap | .014 to .016 in (.36 to .41 mm) |
| Rotation of Rotor | anti-clockwise |
| Dwell Angle | 60 +/-3 degrees |
| Ignition Coil Make/Type | Lucas 12 volt |
| Spark Plug Make/Type | Champion N-9Y |
| Spark Plug Gap | .025 in (.64 mm) |
| Carburetor Make/Type | Twin SU HS4 |
| Carburetor Main Jet | .090" |
| Carburetor Main Jet Needle | MB, 5, FX, AAE, AAL |
| Carburetor Piston Spring | red |
| Vehicle Specification | |
| Length | 12 ft 8 1/2 in (3.8 m) |
| Width | 4 ft 11 15/16 in (152.3 cm) |
| Height | 4 ft 1 3/8 in (125.4 cm) |
| Ground Clearance | 5 in (12.7 cm) min. |
| Track Front | 4 ft 1 in (124.4 cm) disc wheels, 4 ft 1 1/4 in (125 cm) wire wheels |
| Track Rear | 4 ft 1 1/4 in (125 cm) |
| Wheelbase | 7 ft 7 in (231.1 cm) |
| Turning Circle | 32 ft (9.75 m) |
| Toe-In | 1/16 to 3/32 in (1.5 to 2.3 mm) |
| Empty Weight | 1920 lb (871 kg) |
| Curb Weight | 2030 lb (920 kg) |
| Gross Weight | 2430 lb (1102 kg) max |
| Original Tire Size | 5.60-14 or 155-14 |
| Original Tire Pressure Front (Cold) | 20 |
| Original Tire Pressure Rear (Cold) | 24 |
| Replacement Tire Size | 165SR-14 |
| Engine Specification | |
| Engine Type | "B-Series" 4 cyl inline ohv 5 bearing |
| Engine Displacement | 1798 cc (109.8 ci) |
| Firing Order | 1, 3, 4, 2 |
| Compression Ratio | 8.8:1 (HC), 8.0:1(LC) |
| Engine Bore | 3.16 in (80.26 mm) |
| Engine Stroke | 3.5 in (89 mm) |
| Number of Cylinders | 4 |
| Oil Pressure Idle | 10 to 25 lb/in2 (0.7 to 1.0 bar) |
| Oil Pressure Normal | 50 to 80 lb/in2 (3.5 to 5.6 kg/cm2) |
| Charging System | Generator (65-67) Alternator (68 on) |
| Ignition Type | points |
| Fuel Pump Make/Type | SU type HP or AUF 300 electric |
| Fuel Tank Capacity | 14 US gallons |
| Cooling System Capacity | 11.4 pints w/o heater, 12 pints w/ heater |
| Sump Capacity | 9 pints |
| Gearbox Capacity, non-overdrive | 5.6 pints |
| Gearbox Capacity, overdrive | 6 pints |
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