Target Audience:
BMW enthusiasts, DIY mechanics, classic car owners seeking in-depth repair knowledge.
Advantage:
Official factory documentation ensures accuracy and completeness, unlike generic aftermarket guides.
Accuracy:
Information is the same as used by dealership technicians and BMW engineers.
Usability:
Digital format allows for easy searching, printing specific sections, and zooming in on details.
Cost Savings:
Enables owners to perform repairs themselves, saving significant labor costs.
Engine Mechanical:
Complete overhaul, internal component inspection and replacement, timing, valve adjustments.
Engine Electrical:
Ignition system, starting system, charging system, fuel injection system (Bosch L-Jetronic), sensors, ECU diagnostics.
Fuel System:
Fuel pump, fuel filter, fuel lines, injection system diagnostics and repair.
Transmission:
Manual transmission (Getrag 260) removal, inspection, repair, fluid replacement; Automatic transmission (ZF 4HP22) diagnostics and maintenance.
Drivetrain:
Clutch operation and adjustment, driveshaft, universal joints, differential inspection and service.
Suspension:
Front struts, rear shock absorbers, control arms, bushings, springs, anti-roll bars, alignment specifications.
Steering:
Steering rack, power steering pump and system, tie rods, steering linkage.
Brakes:
Front ventilated discs, rear discs (or drums on some early models), brake fluid, calipers, master cylinder, ABS (if equipped, though rare on 518).
Cooling System:
Radiator, thermostat, water pump, coolant hoses, fan clutch, heater core.
Exhaust System:
Catalytic converter (if applicable), muffler, exhaust pipes, mounting hardware.
Electrical System:
Complete wiring diagrams, fuse box layout, lighting, instruments, interior electronics, diagnostic procedures.
Body And Chassis:
Body panel removal and installation, doors, windows, locks, hinges, seals, frame inspection.
HVAC:
Air conditioning system, heater blower, controls, ducting, cabin filter replacement (if applicable).
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication, spark plug replacement, drive belt inspection and replacement.
Troubleshooting:
Diagnostic flowcharts for common problems, fault code interpretation (OBD-I for this era), symptom-based repairs.
Repair:
Step-by-step instructions for component replacement, rebuilding, and adjustment across all vehicle systems.
Diagnostics:
In-depth diagnostic procedures for engine, electrical, and mechanical systems using basic tools and factory specifications.
Specifications:
Torque specifications for all fasteners, engine clearances, fluid capacities, electrical values, alignment settings.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, detailed electrical diagnostics and wiring schematics.
Crash Test Era:
Early 1980s safety standards, pre-modern crash testing protocols.
Brakes:
Standard 4-wheel disc brakes (ventilated front), power assisted.
Steering:
Recirculating ball steering with power assist.
Occupant Protection:
Reinforced chassis, crumple zones, safety glass, padded interior surfaces.
Seat Belts:
Standard 3-point front seat belts; lap belts in rear.
Headlights:
Halogen headlights for improved visibility.
Oil Change Interval:
Every 5,000 - 10,000 km (3,000 - 6,000 miles) or 6-12 months, depending on driving conditions and oil type.
Air Filter Replacement:
Every 15,000 - 20,000 km (9,000 - 12,000 miles)
Spark Plug Replacement:
Every 20,000 - 30,000 km (12,000 - 18,000 miles)
Coolant Flush:
Every 2-3 years or 40,000 - 60,000 km (25,000 - 37,000 miles)
Engine Oil:
API SF or SG; SAE 20W-50 or 15W-40 recommended for warmer climates, 10W-40 for cooler climates. Capacity: Approx. 4.5 liters with filter.
Coolant:
50/50 mix of Ethylene Glycol Antifreeze and distilled water.
Brake Fluid:
DOT 3 or DOT 4 (ensure compatibility with ABS if fitted, though unlikely on 518).
Rust:
Common rust points include wheel arches, rocker panels, door bottoms, and boot lid edges.
Engine Oil Leaks:
Valve cover gasket, oil pan gasket, and front/rear main seals are common leak sources.
Suspension Wear:
Bushings (control arm, sway bar), ball joints, and tie rod ends are subject to wear, leading to imprecise handling.
Cooling System Failures:
Radiator leaks, aged hoses, and faulty thermostat or water pump can lead to overheating.
Electrical Gremlins:
Corroded connectors, failing relays, and aged wiring looms can cause intermittent electrical faults.
