Engine Mechanical:
Engine overhaul, cylinder head, block, crankshaft, pistons, connecting rods, camshaft, valve train, timing. Likely focuses on the M10 engine series.
Engine Fuel System:
Fuel injection system (likely Bosch K-Jetronic or L-Jetronic depending on specific market/year), fuel pump, injectors, pressure regulator, fuel lines.
Engine Ignition System:
Ignition coils, distributor (if applicable), spark plugs, ignition timing, control module.
Engine Cooling System:
Radiator, fan, water pump, thermostat, coolant hoses, expansion tank.
Engine Lubrication System:
Oil pump, oil filter, oil pan, oil pressure, oil cooler (if equipped).
Transmission Manual:
Clutch operation, gearbox overhaul, shift linkage, gear ratios, torque specifications.
Transmission Automatic:
Likely coverage for the ZF 3HP22 or similar automatic transmissions used in the E28 chassis, including hydraulic control, torque converter, and overhaul procedures.
Drivetrain:
Driveshafts, universal joints, differential, axle shafts, wheel bearings.
Suspension Front:
MacPherson struts, control arms, sway bar, steering knuckle, bushings, springs, shock absorbers.
Suspension Rear:
Semi-trailing arms, differential mountings, shock absorbers, springs, bushings.
Steering System:
Steering rack, power steering pump, fluid reservoir, steering column, tie rods, ball joints.
Braking System:
Front and rear disc brakes, calipers, brake pads, rotors, master cylinder, brake booster, hydraulic lines, parking brake, ABS (if equipped).
Electrical System Overview:
Wiring diagrams, fuse box layout, relay functions, general electrical principles for the E28 chassis.
Lighting System:
Headlights, taillights, interior lights, fog lights, wiring and bulb specifications.
Instrument Panel Gauges:
Speedometer, tachometer, fuel gauge, temperature gauge, warning lights, diagnostic indicators.
Body And Chassis:
Body panel removal and installation, door mechanisms, glass replacement, structural components.
HVAC System:
Heating, ventilation, air conditioning (if equipped), blower motor, climate controls, refrigerant system diagnostics.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections.
Troubleshooting:
Diagnostic flowcharts, common symptom identification, fault code interpretation (if applicable).
Repair Procedures:
Step-by-step instructions for component removal, repair, and reinstallation for all major systems.
Adjustment Procedures:
Valve lash adjustment, ignition timing, throttle linkage, handbrake adjustment.
Engine Rebuild:
Detailed instructions for complete engine disassembly, inspection, machining, and reassembly.
Transmission Overhaul:
Procedures for disassembling, inspecting, and rebuilding both manual and automatic transmissions.
Brake Service:
Brake pad and rotor replacement, caliper servicing, bleeding the brake system.
Electrical Component Replacement:
Starter motor, alternator, battery, ignition switch, lighting components.
Diagnostic Capability:
Covers basic to intermediate diagnostics, including electrical system testing and symptom-based troubleshooting.
Repair Complexity:
Suitable for DIY enthusiasts and professional mechanics, covering everything from simple maintenance to major component overhauls.
Data Availability:
Includes torque specifications, clearances, fluid capacities, and electrical specifications essential for accurate repairs.
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or 12 months, depending on driving conditions. Consult manual for exact recommendations.
Transmission Fluid Change Manual:
Recommended every 30,000 - 50,000 miles (48,000 - 80,000 km). Verify with manual.
Transmission Fluid Change Automatic:
Recommended every 30,000 - 50,000 miles (48,000 - 80,000 km), especially if towing or under heavy use. Verify with manual.
Spark Plug Replacement:
Typically every 20,000 - 30,000 miles (32,000 - 48,000 km) for standard spark plugs. Platinum or iridium plugs would have longer intervals.
Coolant Flush:
Every 2-3 years or 30,000 - 50,000 miles (48,000 - 80,000 km).
Brake Fluid:
DOT 3 or DOT 4 (confirm specific BMW recommendation).
Power Steering Fluid:
BMW's own power steering fluid or a Dexron III compatible fluid (confirm with manual).
Rust Susceptibility:
Common E28 issue, particularly around wheel arches, rocker panels, and trunk lid edges. Proper rustproofing and maintenance are crucial.
Cooling System Leaks:
Older hoses, water pumps, and radiator connections can degrade, leading to leaks.
Electrical Gremlins:
Aging wiring harnesses, degraded connectors, and failing relays can cause intermittent electrical issues.
Fuel Injector Clogging:
With age, fuel injectors can become clogged, affecting performance and fuel economy.
Worn Suspension Bushings:
Rubber bushings in control arms, trailing arms, and sway bars can wear, leading to sloppy handling and noise.