Engine:
Detailed diagnosis, repair, overhaul procedures for all E28 gasoline engines.
Fuel System:
Fuel injection systems (Bosch L-Jetronic, Motronic), fuel pumps, injectors, pressure regulators.
Ignition System:
Distributor, coils, spark plugs, ignition timing, electronic control units (ECU).
Cooling System:
Radiator, water pump, thermostat, hoses, fan, heater core, coolant specifications.
Exhaust System:
Catalytic converters, mufflers, pipes, oxygen sensors, emission controls.
Transmission Manual:
Gearbox overhaul, clutch replacement, shift linkages, fluid specifications.
Transmission Automatic:
Automatic transmission diagnosis, fluid changes, valve body, torque converter (if applicable).
Drivetrain:
Driveshafts, universal joints, differential, axle shafts.
Suspension Front:
MacPherson struts, control arms, ball joints, bushings, alignment specifications.
Suspension Rear:
Semi-trailing arms, shock absorbers, springs, bushings, alignment specifications.
Steering System:
Steering rack, power steering pump, fluid, tie rods, steering column.
Brakes Front:
Disc brake calipers, rotors, pads, brake lines, ABS (if equipped).
Brakes Rear:
Disc brake calipers, rotors, pads, brake lines, parking brake mechanism.
Wheels Tires:
Bolt patterns, torque specifications, tire pressure recommendations.
Electrical System:
Wiring diagrams, fuse box locations, relays, battery, alternator, starter.
Lighting System:
Headlights, taillights, interior lights, bulb types, wiring.
Instrument Panel:
Gauges, warning lights, dashboard illumination, switchgear.
HVAC System:
Heater core, blower motor, A/C compressor, refrigerant, controls.
Body Exterior:
Door mechanisms, window regulators, trim, body panel removal and installation.
Body Interior:
Seat removal, headliner, carpeting, dashboard disassembly.
Diagnostics Troubleshooting:
Systematic diagnostic procedures, fault codes (if applicable), common problems and solutions.
Scheduled Maintenance:
Oil changes, filter replacements, spark plugs, tune-ups, fluid checks.
Engine Repair:
Head gasket replacement, piston ring installation, bearing replacement, valve adjustments.
Transmission Repair:
Gearbox rebuilds, clutch service, transmission fluid and filter replacement.
Brake Repair:
Brake pad and rotor replacement, caliper overhaul, brake bleeding, ABS system service.
Suspension Repair:
Shock/strut replacement, control arm bushings, ball joint replacement, steering rack repair.
Electrical Repair:
Wiring harness repair, component testing, alternator/starter replacement.
Bodywork:
Panel alignment, rust repair basics, trim component replacement.
Torque Specifications:
Detailed torque values for all fasteners throughout the vehicle.
Wiring Diagrams:
Comprehensive electrical circuit diagrams for all systems.
Depth:
Expert Level (Covers engine rebuilds, transmission overhauls, advanced diagnostics).
Diagnostic Tools:
References to specific diagnostic procedures and potential use of specialized tools.
Oil Change Interval:
Typically every 5,000-7,500 miles or annually, depending on driving conditions.
Major Service Interval:
Refer to manual for specific mileage intervals for spark plugs, timing belts (if applicable), coolant flushes, etc.
Engine Oil:
10W-40 or 15W-40 synthetic or semi-synthetic oil recommended (refer to manual for exact specs).
Coolant:
BMW Blue Antifreeze/Coolant or equivalent G48 coolant.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Common Problems:
Cooling system leaks (hoses, water pump), fuel injector seal leaks, differential seal leaks, rear subframe mounts, seized brake calipers, electrical connector corrosion.
Eta Engine Specifics:
Timing belt replacement is critical; check for head gasket issues on high-mileage examples.
Electrical Gremlins:
Due to age, wiring harness degradation and connector corrosion can cause intermittent issues.