Engine:
Detailed diagnosis, repair, and overhaul procedures for all E34 5 Series gasoline engines offered in 1992, including M50 (2.5L), M30 (3.0L, 3.5L), and potentially M60 (4.0L) depending on specific models covered.
Transmission:
Covers both manual (Getrag 260, Getrag 420G) and automatic (ZF 4HP22, ZF 5HP18) transmissions. Includes overhaul, component replacement, fluid service, and troubleshooting.
Drivetrain:
Rear-wheel drive (RWD) system, including driveshaft, universal joints, differential (open and limited-slip options), axle shafts, and wheel bearings.
Suspension:
Front and rear suspension systems. Covers McPherson struts, control arms, ball joints, tie rods, bushings, springs, shock absorbers, sway bars, and leveling systems (if applicable).
Steering:
Power steering system, including pump, steering rack, hydraulic lines, steering column, and wheel alignment procedures.
Brakes:
Hydraulic brake system (front discs, rear discs/drums depending on model), Anti-lock Braking System (ABS) components, hydraulic lines, calipers, master cylinder, brake fluid service, and bleeding procedures.
Electrical:
Comprehensive electrical system coverage. Includes wiring diagrams for all major systems (engine management, lighting, comfort, safety), battery, alternator, starter, fuses, relays, ignition system, and diagnostic connector.
Fuel System:
Fuel delivery, including fuel pump, fuel filter, fuel injectors, fuel pressure regulator, and emissions control systems (e.g., catalytic converter, EVAP).
Cooling System:
Radiator, fan, water pump, thermostat, hoses, and coolant specifications.
Exhaust System:
Exhaust manifolds, catalytic converters, mufflers, and pipes.
Body And Chassis:
Exterior body panels, doors, hood, trunk, windows, seals, interior trim, seats, and chassis structural components. Includes repair and alignment procedures.
Climate Control:
HVAC system, including A/C compressor, condenser, evaporator, heater core, blower motor, and control modules.
Restraints:
Seat belt systems and mounting points. Airbag systems are generally not covered in detail for pre-SRS models but may have basic information on related components.
Maintenance:
Routine maintenance tasks: oil changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, coolant flushes, brake fluid changes, tire rotation, and lubrication.
Diagnostics:
Troubleshooting guides and diagnostic flowcharts for common problems across all major systems. Includes interpretation of engine control unit (ECU) fault codes via the diagnostic connector.
Repair:
Step-by-step repair instructions for component replacement and assembly/disassembly of mechanical and electrical parts.
Rebuilding:
Detailed procedures for rebuilding major components such as engines, transmissions, and steering racks.
Restoration:
Guidance on refurbishing and restoring various aspects of the vehicle, including bodywork, interior components, and mechanical systems.
Specifications:
Torque specifications, clearances, measurements, and adjustment procedures for all serviceable parts.
Wiring Diagrams:
Complete, detailed wiring diagrams for all electrical systems, facilitating troubleshooting and repair of electrical issues.
Troubleshooting Charts:
Systematic charts to diagnose and resolve common drivability, electrical, and mechanical problems.
Depth:
Extensive, covering everything from basic preventative maintenance to complex engine rebuilds and advanced electrical diagnostics.
Detail Level:
Highly detailed, often including exploded views, step-by-step photographic or illustrative guidance, and precise technical data.
Oil Change Interval:
Typically every 7,500-10,000 miles (12,000-16,000 km) or annually, depending on driving conditions and oil type used. BMW's Condition Based Service (CBS) was not yet prevalent; manual recommendations apply.
Spark Plug Replacement:
Around 30,000 miles (48,000 km) for standard plugs, up to 60,000 miles (96,000 km) for premium long-life plugs (e.g., platinum/iridium).
Transmission Fluid Change:
Manual: Lifetime fill recommended by some sources, but periodic checks and changes (e.g., every 60,000-100,000 miles) are advised for longevity. Automatic: Fluid and filter service recommended every 50,000-80,000 miles (80,000-130,000 km).
Engine Oil Spec:
BMW Longlife-98 or Longlife-01 specification oil is recommended, typically SAE 0W-40, 5W-30, or 5W-40. Consult manual for specific engine recommendations. API SG/SH rated oils were common.
Coolant Spec:
Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. BMW coolant concentrate or a compatible universal coolant is required.
Brake Fluid Spec:
DOT 4 or DOT 4 PLUS brake fluid. Regular flushing and replacement (every 2 years) is crucial.
Common Problems:
Coolant leaks (cracked plastic expansion tank, water pump housing, heater core), fuel pump failure, ABS sensor failures, window regulator failures, blower motor resistor failure, VANOS (Variable Valve Timing) issues on M50 engines, and head gasket leaks on high-mileage M30 engines.
Preventative Maintenance:
Regular inspection and replacement of cooling system components, periodic inspection of suspension bushings, and fuel system cleaning can prevent many common issues.