Positioning:
BMW's mid-size luxury sports sedan offering, known for its driving dynamics and build quality.
Competitors 1982:
Mercedes-Benz W123/W124, Audi 5000, Jaguar XJ6, Cadillac Seville.
Signature Traits:
Rear-wheel drive, sophisticated independent suspension, powerful inline-six engines, driver-focused interior, robust engineering.
Manual Value Proposition:
Provides essential, accurate, and specific information critical for maintaining the longevity and performance of the E28 chassis, differentiating it from generic repair guides.
Engine Mechanical:
Engine overhaul, cylinder head, block, crankshaft, pistons, connecting rods, camshafts, valve train, timing chain/belt, lubrication system, cooling system, fuel injection system (Bosch L-Jetronic/Motronic variants).
Engine Management:
Ignition system (distributor, coil, spark plugs), ECU functions, sensor diagnostics, emissions control systems.
Transmission Manual:
Clutch assembly, gearbox overhaul, gear selection mechanism, driveshafts, universal joints.
Transmission Automatic:
Automatic gearbox overhaul (e.g., ZF 4HP22), hydraulic control, torque converter, electronic controls (if applicable).
Brakes:
Hydraulic system, brake lines, master cylinder, front disc brakes (ventilated), rear disc brakes, parking brake system, ABS (Antilock Braking System) - early variants.
Suspension Steering:
Front MacPherson struts, rear semi-trailing arms, shock absorbers, springs, bushings, steering rack, power steering system, wheel alignment specifications.
Electrical System:
Wiring diagrams, charging system (alternator, regulator), starting system (starter motor), lighting circuits, instrument cluster, power windows, power locks, HVAC controls, fuse box layout, relay functions, diagnostic connectors.
Body And Chassis:
Body panel removal/installation, door mechanisms, interior trim, sunroof operation, chassis identification, jacking points, towing information.
HVAC:
Heating system, ventilation, air conditioning system (components, refrigerant, servicing).
Maintenance:
Oil changes, filter replacements (oil, fuel, air), spark plug replacement, coolant flush, brake fluid change, belt inspection/replacement, general lubrication.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults, fault code interpretation (OBD I era), circuit testing.
Repair:
Component removal, installation, and overhaul procedures for all major vehicle systems.
Specifications:
Torque specifications for all fasteners, clearances, fluid capacities, electrical values, diagnostic parameters.
Adjustments:
Valve adjustments, ignition timing, idle speed, clutch free play, handbrake adjustment.
Rebuilding:
Detailed instructions for engine, transmission, differential, and other major component rebuilds.
Depth:
Factory-level technical detail, suitable for professional technicians and advanced DIY enthusiasts. Includes disassembly, inspection, repair, and reassembly for most components.
Diagnostic Focus:
Emphasis on systematic troubleshooting and diagnostic procedures using electrical schematics and component testing methods.
Special Tools:
Identification of BMW-specific tools required for certain procedures.
Engine Codes 1982:
M30B28 (2.8L), M30B32 (3.2L), M10B20 (2.0L in some markets).
Engine Type:
Inline 6-cylinder (most common), Inline 4-cylinder (2.0L models)
Displacement:
2.0L (1990 cc), 2.8L (2788 cc), 3.2L (3210 cc)
Horsepower 2.8L:
~170-181 hp (depending on market and tune)
Torque 2.8L:
~215-230 Nm (depending on market and tune)
Horsepower 3.2L:
~184-197 hp (depending on market and tune)
Torque 3.2L:
~270-285 Nm (depending on market and tune)
Injection System:
Bosch L-Jetronic (early) or Motronic (later models, with ignition and fuel management integration).
Fuel Type:
Unleaded gasoline (premium recommended)
Engine Block Material:
Cast Iron
Cylinder Head Material:
Aluminum Alloy
Valve Train:
SOHC (Single Overhead Camshaft), 2 valves per cylinder
Oil Change:
Typically every 5,000-10,000 km (3,000-6,000 miles) or 6-12 months, depending on driving conditions and oil used.
Air Filter:
Inspect every 10,000 km, replace every 20,000-30,000 km.
Spark Plugs:
Replace every 30,000-50,000 km, depending on type (copper vs. platinum).
Coolant Flush:
Every 2-3 years or 40,000-60,000 km.
Timing Belt Chain:
M10/M30 engines use timing chains, requiring inspection for stretch/wear but generally not a scheduled replacement interval unless issues arise.
Engine Oil Type:
API SG or higher, SAE 15W-40 or 10W-40 (check specific model/climate for optimal viscosity, synthetic oils can be used).
Coolant Type:
BMW Blue Antifreeze/Coolant (ethylene glycol based) or equivalent. Typically a 50/50 mix with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Transmission Fluid Manual:
GL-4 gear oil, SAE 75W-90 or 80W-90.
Transmission Fluid Automatic:
Dexron II or equivalent ATF (Automatic Transmission Fluid).
Power Steering Fluid:
ATF (Automatic Transmission Fluid) or Pentosin CHF 11S for specific steering systems.
Common E28 Issues:
Cooling system leaks (hoses, radiator, water pump), fuel distributor problems (L-Jetronic), fuel pump failures, differential seal leaks, seized sunroof mechanisms, rust in common areas (wheel wells, rocker panels, battery tray), aging rubber bushings, occasional fuel injector clogging.
Electrical Common Issues:
Corroded fuse box terminals, failing alternator voltage regulators, worn injector wiring harnesses, instrument cluster lighting failures.
Bmw Philosophy:
Bayerische Motoren Werke AG has a long history of producing performance-oriented luxury vehicles, emphasizing engineering excellence and driving pleasure.
E28 Predecessor:
The E28 succeeded the E12 5-series.
E28 Successor:
The E28 was succeeded by the E34 5-series.
E28 Design:
Known for its sharper, more angular styling compared to the E12, featuring BMW's signature 'kidney' grille and Hofmeister kink. Styled by Paul Bracq.
Production Years:
1981-1988
Manufacturing Locations:
Germany (Dingolfing), South Africa, Thailand, Mexico.
Notable Variants:
520i, 524d (diesel), 525e, 528i, 533i, M535i, and the iconic E28 M5.