Segment:
Compact executive car (sport sedan/coupe).
Target Audience:
Enthusiasts, professional mechanics, and dedicated BMW owners seeking in-depth technical information.
Key Competitors:
Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Ford Sierra XR4i, etc.
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel drive, and engaging driving experience.
Engine Performance:
Smooth inline-six engines providing a good blend of power and refinement.
Build Quality:
Typical BMW build quality, known for durability and longevity.
Engine Mechanical:
Complete engine overhaul, cylinder head, block assembly, pistons, crankshaft, camshaft, valve train, timing belt/chain, seals, gaskets.
Engine Management And Emission Control:
Fuel injection system (Bosch Motronic), ignition system, sensors, actuators, emissions control systems (catalytic converter, EGR if applicable), diagnostic trouble codes (DTCs).
Transmission:
Manual transmission (Getrag 260) and automatic transmission (ZF 4HP22) repair, overhaul, fluid services, shift linkage, torque converter.
Drivetrain:
Driveshaft, universal joints, differential, rear axle assembly, wheel bearings, CV joints (if applicable).
Suspension:
Front suspension (MacPherson struts, control arms), rear suspension (semi-trailing arms), springs, shock absorbers, bushings, alignment procedures.
Steering:
Steering rack, power steering system, steering column, tie rods, alignment specifications.
Brakes:
Front and rear disc brakes, ABS system (if equipped), brake calipers, rotors, pads, lines, master cylinder, brake bleeding procedures.
Electrical System:
Battery, alternator, starter, lighting system, wiring diagrams, fuses, relays, ignition switch, horn, wipers, power windows, power locks.
Body And Chassis:
Body panel removal and installation, door mechanisms, window regulators, body seals, frame construction, underbody protection.
Heating Ventilation And Air Conditioning HVAC:
HVAC system components, blower motor, heater core, A/C compressor, refrigerant, controls, dashboard removal.
Fuel System:
Fuel tank, fuel pump, fuel lines, fuel filter, fuel injectors, evaporative emissions control (EVAP).
Cooling System:
Radiator, coolant hoses, water pump, thermostat, cooling fan, expansion tank, coolant specifications.
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, fluid checks and top-offs, belt inspections.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon problems, symptom-based troubleshooting charts.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement, brake system repairs.
Component Diagnostics:
Detailed testing procedures for all major engine, chassis, and electrical components.
Wiring Diagrams:
Comprehensive, color-coded wiring diagrams for all vehicle systems.
Torque Specifications:
Precise torque values for all critical fasteners and bolts.
Special Tool Requirements:
Identification and usage of specialized tools required for certain repair procedures.
Diagnostic Trouble Code DTC Listing:
Explanation and interpretation of diagnostic codes generated by the vehicle's computer.
Depth:
Comprehensive from basic maintenance to complete engine and transmission overhauls, including electronic diagnostics and body repair.
Oil Change Interval:
Approximately 10,000-15,000 km (6,000-10,000 miles) or 12 months, depending on driving conditions and oil quality. Consult manual for specific recommendation.
Spark Plug Replacement:
Typically around 30,000-50,000 km (20,000-30,000 miles).
Timing Belt Replacement:
Crucial: The M20 engine uses a timing belt. Replacement interval is critical, usually around 60,000 km (40,000 miles) or 4-5 years due to potential catastrophic failure if it breaks.
Engine Oil Type:
API SG or higher, SAE 15W-40 or 10W-40 (check owner's manual for specific viscosity recommendations based on temperature).
Engine Oil Capacity:
Approx. 4.5 - 5.0 Liters (4.8 - 5.3 US Quarts) with filter change.
Coolant Type:
BMW Blue (ethylene glycol based) or equivalent antifreeze/coolant, mixed 50/50 with distilled water.
Common Wear Items:
Bushings (control arm, sway bar), fuel pump, fuel injectors, radiator, heater core, O2 sensor, vacuum leaks.
Engine Specific Concerns:
Timing belt failure (if not replaced on schedule), head gasket leaks (less common but possible), valve stem seals.
Electrical Issues:
Corroded grounds, aging wiring insulation, Motronic ECU issues, instrument cluster problems.
