Engine:
Comprehensive coverage of M30B35 engine, including tuning, diagnostics, and overhaul.
Fuel System:
Detailed schematics and procedures for Bosch Motronic fuel injection system, fuel pump, injectors, and lines.
Ignition System:
Diagnosis and repair of electronic ignition system, coils, distributors, and spark plug maintenance.
Cooling System:
Radiator, water pump, thermostat, fan, and heater core service and repair procedures.
Exhaust System:
Catalytic converter, muffler, and exhaust manifold diagnosis and replacement.
Transmission Manual:
Overhaul, clutch replacement, and adjustment for the Getrag 260 5-speed manual transmission.
Transmission Automatic:
Diagnosis, fluid service, and repair of the ZF 4HP22 automatic transmission.
Drivetrain:
Driveshaft, CV joints, differential, and axle shaft maintenance and repair.
Suspension Front:
Struts, control arms, ball joints, tie rods, and wheel bearing replacement and alignment.
Suspension Rear:
Shock absorbers, trailing arms, bushings, and wheel hub service.
Steering:
Power steering pump, steering rack, and steering column diagnosis and repair.
Brakes Front:
Ventilated disc brake pad and rotor replacement, caliper service, and brake line bleeding.
Brakes Rear:
Disc brake pad and rotor replacement, caliper service, and parking brake adjustment.
ABS:
Anti-lock Braking System (ABS) sensor diagnosis, control unit troubleshooting, and hydraulic unit repair.
Electrical System:
Comprehensive wiring diagrams, fuse box layouts, relay functions, and component testing.
Lighting:
Headlight, taillight, interior lighting, and auxiliary lighting system diagnosis and repair.
Instrument Panel:
Gauge cluster diagnosis, warning light explanation, and odometer troubleshooting.
Comfort Controls:
Climate control system (HVAC), blower motor, refrigerant, and heater control valve service.
Power Accessories:
Power windows, door locks, mirrors, sunroof, and seat adjustment system troubleshooting.
Body And Trim:
Door panel removal, bumper replacement, interior trim fitting, and exterior molding installation.
Chassis:
Frame structure, body mounting, and general chassis inspection.
Scheduled Maintenance:
Detailed schedules for oil changes, filter replacements, fluid checks, and inspections.
Troubleshooting:
Systematic diagnostic procedures and flowcharts for common and intermittent issues.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment.
Engine Rebuild:
Torque specifications, clearance measurements, and assembly instructions for engine internal components.
Transmission Overhaul:
Disassembly, cleaning, inspection, and reassembly of transmission internals.
Brake Service:
Pad/rotor replacement, caliper rebuilding, and bleeding procedures.
Suspension Alignment:
Specifications and adjustments for front and rear wheel alignment.
Electrical Diagnostics:
Using multimeters and test lights to diagnose electrical faults.
Bodywork Repair:
Minor dent repair, panel replacement, and trim fitting guidance.
Depth:
Comprehensive, covering routine maintenance to major mechanical and electrical repairs, including detailed diagnostics.
Diagnostics:
Extensive diagnostic information, including symptom-based troubleshooting and OBD I codes (if applicable for the era).
Rebuild Procedures:
Detailed instructions for rebuilding major components like the engine and transmission.
Wiring Diagrams:
High-quality, often color-coded, wiring schematics for all electrical systems.
Oil Change Interval:
Typically every 7,500 to 10,000 miles (12,000-16,000 km) or annually, whichever comes first, using synthetic oil.
Coolant Flush Interval:
Every 2 years or 30,000 miles (48,000 km).
Brake Fluid Flush Interval:
Every 2 years.
Spark Plug Replacement:
Around 60,000 miles (96,000 km), depending on plug type.
Engine Oil:
SAE 5W-30 or 5W-40 synthetic engine oil meeting BMW LL-01 or equivalent specifications.
Coolant:
BMW blue or green antifreeze (ethylene glycol based) mixed 50/50 with distilled water.
Brake Fluid:
DOT 4 brake fluid.
Transmission Fluid Manual:
GL-4 or GL-5 gear oil (check specific manual for exact type, e.g., Castrol TAF-X).
Transmission Fluid Automatic:
Dexron III/Mercon ATF (Automatic Transmission Fluid) or equivalent specified by BMW.
Cooling System Leaks:
Common for radiator, coolant hoses, and water pump to degrade and leak over time.
Head Gasket:
While the M30 is robust, head gasket issues can arise with age and overheating.
Rear Main Seal:
Leaking rear main crankshaft seal is a common wear item.
Fuel Pump Reliability:
Fuel pumps can eventually fail, requiring replacement.
Electrical Gremlins:
Wiring harness degradation and corrosion can lead to intermittent electrical faults.
Suspension Bushings:
Rubber suspension bushings (control arm, trailing arm) can wear out, affecting handling.