Systems Covered:
Maintenance, Engine, Engine Electrical, Fuel System, Fuel Tank & Lines, Radiator, Exhaust System, Clutch, Manual Transmission, Automatic Transmission, Gear Shift Mechanism, Propeller Shaft, Front Axle, Steering & Wheel Alignment, Rear Axle, Brakes, Pedals, Wheels & Tires, Body, Body Equipment, Seats, Hood, Sun Roof, Electrical System, Instruments, Lights, Heating & Air Conditioning, Radio & Special Equipment, Equipment & Accessories, Body Cavity Sealing & Undercoating
Procedures Included:
Repair, Troubleshooting, Diagnostics, Maintenance, Installation, Adjustments, Rebuilds
Total Size Mb:
more than 650MB
Type:
Workshop Repair & Service Manual
Languages:
English, German
Searchability:
Searchable
Engine Mechanical:
Complete overhaul, timing, valve train, lubrication, cooling, fuel injection (Bosch Motronic for later models), emissions control
Engine Electrical:
Ignition system, starter, alternator, fuel pump, ECU diagnosis and repair
Transmission:
Manual gearbox (Getrag), Automatic gearbox (ZF), clutch system, shift linkage, driveshaft
Suspension Steering:
Front and rear suspension components, shock absorbers, springs, control arms, steering box/rack, power steering system, wheel alignment specifications
Brakes:
Hydraulic system, brake calipers, master cylinder, brake booster, parking brake, ABS diagnosis (where applicable)
Body Chassis:
Body panel repair, rust prevention, door mechanisms, window regulators, sunroof operation, interior trim, seats, bumpers
Electrical Accessories:
Wiring diagrams for all circuits, headlights, taillights, interior lighting, power windows, central locking, HVAC controls, radio, instruments, onboard computer
Fuel Tank Lines:
Includes procedures for fuel tank removal, fuel line inspection and replacement, and fuel filter replacement.
Radiator Cooling:
Covers radiator removal and installation, coolant flushing, thermostat replacement, water pump service, and fan clutch diagnosis.
Exhaust System:
Procedures for exhaust manifold repair, catalytic converter replacement (where applicable), muffler and pipe replacement, and exhaust hanger inspection.
Pedals Controls:
Includes information on brake pedal, accelerator pedal, and clutch pedal assembly adjustments and replacement.
Wheels Tires:
Information on wheel bearing replacement, tire pressure recommendations, and basic wheel balancing procedures.
Body Equipment:
Covers door lock mechanisms, window winding mechanisms, mirror adjustments, and basic trim panel removal.
Seats Interior:
Procedures for seat adjustment mechanisms and potential seat trim repair.
Hood Sunroof:
Details on hood latch mechanisms, hinge adjustments, and sunroof manual operation and repair.
Instruments Gauges:
Covers instrument cluster removal, bulb replacement, and diagnosis of faulty gauges (e.g., speedometer, tachometer, fuel gauge).
Heating Air Conditioning:
Detailed troubleshooting for HVAC system failures, including blower speed control, temperature regulation, and air distribution issues.
Radio Special Equipment:
Information on factory radio removal and installation, antenna connections, and potential troubleshooting for audio system issues.
Equipment Accessories:
Covers various optional equipment and accessories, including power seats, central locking systems, and other comfort features.
Engine Repair:
Complete engine rebuild procedures, piston ring replacement, bearing replacement, cylinder head removal and installation, camshaft timing
Transmission Repair:
Gearbox removal and installation, internal component replacement, clutch replacement, automatic transmission service and adjustment
Brake System Service:
Brake pad and disc replacement, caliper overhaul, bleeding the brake system, hydraulic line repair
Suspension Steering Service:
Ball joint replacement, tie rod end replacement, shock absorber replacement, steering pump service
Electrical Diagnostics:
Troubleshooting electrical faults using wiring diagrams, component testing, sensor diagnostics
Heating Cooling Hv Ac:
HVAC system diagnosis and repair, blower motor replacement, heater core replacement, AC system service (where applicable)
Engine Tuning:
Includes idle speed adjustments, ignition timing settings (where applicable), and fuel mixture adjustments (for carbureted models or early injection systems).
Body Resurfacing:
Guidance on undercoating application, rustproofing techniques, and cavity sealing for long-term body preservation.
Depth:
Comprehensive, covering everything from routine maintenance to complete engine and transmission overhauls. Includes detailed diagnostic procedures and troubleshooting trees.
Diagnostic Tools:
The manual details procedures for using basic hand tools, multimeters for electrical diagnostics, and potentially specific BMW diagnostic tools of the era (though modern OBD scanners would not apply).
Torque Specifications:
Provides critical torque values for critical fasteners across all major mechanical and chassis components, ensuring proper assembly and preventing damage.
Wiring Diagrams:
Extensive and detailed wiring diagrams are included for all electrical systems, crucial for diagnosing and repairing electrical faults.
Engine Family:
BMW M30 (primarily), M102, M106, M88/3
728 Engine Specs:
M30B28: 168 hp @ 5,800 rpm, 172 ft-lb @ 4,000 rpm (early models), later models with M30B28 181 hp @ 5,800 rpm, 173 ft-lb @ 4,200 rpm
730 Engine Specs:
M30B30: 181 hp @ 5,800 rpm, 188 ft-lb @ 3,500 rpm
733I Engine Specs:
M30B32: Early models 194 hp @ 5,500 rpm, 206 ft-lb @ 4,300 rpm. Later models featured variations in output, e.g., 181 hp @ 6,000 rpm, 195 ft-lb @ 4,000 rpm.
735I Engine Specs:
M30B34: 215 hp @ 5,200 rpm, 224 ft-lb @ 4,000 rpm (early), later models with 182 hp @ 5,400 rpm, 210 ft-lb @ 4,000 rpm (735i/L7 1985-1987).
745I Engine Specs:
M102/M106 (turbocharged): 249 hp @ 5,200/4,900 rpm, 276 ft-lb @ 2,600/2,200 rpm. M88/3 (for some markets and L7): 282 hp @ 6,500 rpm, 250 ft-lb @ 4,500 rpm.
Injection System:
Bosch L-Jetronic or Motronic fuel injection depending on model and year. Turbocharged models utilized specific fuel delivery systems.
Oil Change Interval:
Typically every 10,000 - 15,000 km (6,000 - 9,000 miles) or annually, depending on driving conditions and oil specification used. The manual will provide precise intervals based on the specific model and oil type.
Spark Plug Replacement:
Intervals vary by spark plug type (e.g., standard, platinum, or iridium). Typically around 30,000 - 50,000 km (20,000 - 30,000 miles) for standard plugs. Manual will specify exact types and intervals.
Engine Oil Type:
Viscosity grades like 10W-40, 15W-40, or 20W-50 were common, depending on climate. Modern synthetic oils meeting BMW specifications are recommended. Manual will specify API service categories and BMW LL grades.
Coolant Type:
Ethylene glycol-based antifreeze mixture. Manual specifies correct ratios and BMW coolant specifications.
Transmission Fluid:
Manual transmission: Gear oil (e.g., GL-4). Automatic transmission: ATF (Automatic Transmission Fluid) specific to the ZF gearbox model (e.g., Dexron II or equivalent). Manual will detail exact fluid types and capacities.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid, as specified in the manual. Regular flushing and replacement are crucial.
Common E23 Problems:
Rust (especially wheel arches, rocker panels, and trunk floor), vacuum leaks (affecting various systems including HVAC and idle control), aging rubber components (hoses, bushings, mounts), cooling system issues (leaks, radiator), and potential for electrical gremlins due to age.
