Era:
Covers the popular E30 (3 Series) and E28/E34 (5 Series) generations, BMW's entry into mass-market sport sedans.
Rivals:
Competed with Mercedes-Benz W201 (190E) and W124 (E-Class), Audi 80/100, Volvo 240/740.
Driving Dynamics:
Renowned for precise handling, rear-wheel drive, balanced chassis, and responsive engines.
Build Quality:
German engineering, solid construction, and durable materials characteristic of BMW.
Purpose:
Essential for owners and independent mechanics to maintain and repair these classic BMWs, preserving their performance and value.
Engine:
Comprehensive engine overhauls, diagnostics, repair procedures for M10, M20, M30, M40, M42 (likely 4-cyl and 6-cyl variants) gasoline engines.
Fuel System:
Fuel injection systems (Bosch L-Jetronic, Motronic), carburetors (where applicable), fuel pumps, lines, and filters.
Ignition System:
Ignition coils, distributors, spark plugs, timing, electronic ignition control.
Cooling System:
Radiator, coolant hoses, thermostat, water pump, fan clutch, cooling fan.
Exhaust System:
Exhaust manifolds, catalytic converters (if equipped), mufflers, pipes, hangers.
Transmission:
Manual transmission (Getrag, ZF) repair, clutch replacement, automatic transmission (ZF, GM) overhaul and diagnostics.
Drivetrain:
Driveshafts, universal joints, CV joints, differential repair, rear axle assembly.
Suspension:
Front struts, rear shock absorbers, control arms, bushings, sway bars, wheel bearings.
Steering:
Steering rack, power steering pump, hoses, linkages, steering column.
Brakes:
Disc brake calipers, rotors, pads, brake lines, master cylinder, ABS diagnostics (if equipped).
Electrical System:
Wiring diagrams, fuse box layout, starter, alternator, battery, lighting, power windows, central locking.
Body And Chassis:
Body panel repair, door mechanisms, window regulators, interior trim, rust prevention and repair.
HVAC:
Heater core, ventilation system, A/C system (charging, leak detection, component replacement).
Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspections and replacement.
Diagnostics:
Troubleshooting guides for common issues, symptom-based diagnostics, use of diagnostic tools.
Repair:
Step-by-step instructions for component removal, replacement, and reassembly for all major systems.
Rebuilds:
Detailed procedures for engine and transmission overhauls, including torque specifications and clearances.
Adjustments:
Valve adjustments, timing belt tension, idle speed adjustments.
Specifications:
Torque specifications, clearances, fluid capacities, electrical component resistance values.
Depth:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds, including electrical system diagnostics and wiring diagrams.
3 Series Engines:
M10 (4-cylinder, e.g., 318i, 320i), M20 (6-cylinder, e.g., 325e, 325i, 335i), M40 (4-cylinder, e.g., 316i, 318i in some markets), M42 (4-cylinder DOHC, 318is).
5 Series Engines:
M30 (6-cylinder, e.g., 528e, 535i), M20 (6-cylinder, e.g., 520i, 525i), M40 (4-cylinder, e.g., 518i in some markets).
Typical Hp Range:
Approximately 105 hp (316i) to 211 hp (535i).
Typical Torque Range:
Approximately 105 lb-ft to 225 lb-ft.
Injection Type:
Bosch K-Jetronic (CIS), L-Jetronic, and Motronic EFI systems depending on engine and year.
ECU:
Early electronic control units (ECUs) for fuel injection and ignition timing.
3 Series Standard:
4-speed or 5-speed manual transmissions (Getrag 240, 260).
5 Series Standard:
5-speed manual transmissions (Getrag 260, 265).
3 Series Optional:
3-speed or 4-speed automatic transmissions (ZF 3HP22, ZF 4HP22).
5 Series Optional:
4-speed automatic transmissions (ZF 4HP22, GM 4L30-E on some later models).
Clutch Type:
Single dry plate clutch.
Manual Transmission Fluid:
Typically Dexron III/Mercon ATF or specific manual transmission fluid (MTF) depending on transmission type. Refer to manual for exact specification (e.g., BMW MTF LT-2).
Automatic Transmission Fluid:
Dexron III/Mercon ATF or equivalent.
Oil Change:
Typically every 5,000-7,500 miles (8,000-12,000 km) or annually, depending on driving conditions. Refer to manual for specific intervals.
Spark Plugs:
Intervals vary by engine; typically 20,000-30,000 miles (32,000-48,000 km) for older plug types, 60,000+ miles for longer-life options.
Timing Belt:
M10 and M20 engines use timing belts, typically replaced every 40,000-60,000 miles (64,000-96,000 km) or 4-5 years. M30 engines use timing chains, generally maintenance-free but require inspection.
Engine Oil:
API SG or SH, SAE 15W-40 or 10W-40 for most engines. 5W-30 or 5W-40 for colder climates or specific high-performance engines. Always verify with manual.
Coolant:
BMW Blue Antifreeze or equivalent ethylene glycol-based coolant, mixed 50/50 with distilled water.
Brake Fluid:
DOT 3 or DOT 4 glycol-based brake fluid.
Rust Prone Areas:
Wheel wells, rocker panels, rear quarter panels, jacking points, battery tray area.
Engine Common Problems:
Oil leaks (valve cover gasket, oil pan gasket), coolant leaks (hose failures, radiator leaks, water pump seals), starter motor issues, fuel injector seal leaks.
Suspension Common Problems:
Worn control arm bushings, failing front strut mounts, worn rear shock absorbers.
Electrical Common Problems:
Corroded grounds, failing instrument cluster illumination, door lock actuators, window regulator failures.
Maintenance Schedule Summary
Basic Maintenance:
Regular oil and filter changes, air filter replacement, fluid level checks, belt inspections.
Intermediate Maintenance:
Coolant flush, brake fluid flush, transmission fluid change, spark plug replacement, differential fluid change.
Major Maintenance:
Timing belt replacement (M10/M20), valve adjustments, suspension component renewal, exhaust system inspection.
Bmw Philosophy:
Bayerische Motoren Werke AG, known for 'The Ultimate Driving Machine' slogan, emphasizing performance, engineering, and driver engagement.
E30 Generation:
The E30 (1983-1991) is considered a legendary generation of the 3 Series, introducing the M3 variant and solidifying BMW's sport sedan reputation.
E28 Generation:
The E28 (1982-1988) was the second generation of the 5 Series, building on the success of the E12 and introducing models like the M5.
E34 Generation:
The E34 (1988-1996) succeeded the E28, representing a significant leap in technology, luxury, and styling, including the introduction of the V8 engine.
Manufacturing Locations:
Primarily Germany (Munich, Dingolfing), with some assembly in other international locations.
