Market Position:
The BMW 8 Series (E31) was BMW's flagship luxury grand tourer of the 1990s, positioned as a high-performance, sophisticated, and exclusive coupe. It competed against other luxury performance coupes like the Mercedes-Benz SL and the Aston Martin DB7.
Competitive Analysis:
The E31 8 Series distinguished itself with its advanced engineering, potent V8 and V12 engines, sophisticated chassis, and distinctive wedge-shaped styling. It prioritized driver engagement and long-distance comfort over outright sportscar agility.
Key Features:
Pop-up headlights, pillarless hardtop design, powerful naturally aspirated V8 and V12 engines, advanced electronics for its time, luxurious interior appointments, and iconic styling.
Design Philosophy:
The E31 was conceived as a high-performance GT, blending cutting-edge technology and luxury with classic BMW driving dynamics.
Coverage Areas:
Maintenance, general instructions, motor, engine electrics, fuel preparation and control, fuel tank and lines, radiator, exhaust system, clutch, gearbox, drive chain, steering, rear wheel drive, brakes, wheels and tyres, frame, equipment, general electrical equipment, instruments, lights
Page Count:
Unknown (Digital format, typically comprehensive for factory manuals)
Manual Type:
Factory Repair Manual / Service Manual
Manual Purpose:
Designed to facilitate repairs, maintenance, and diagnostics for the BMW 8 Series E31, enabling users to perform tasks efficiently and accurately.
File Accessibility:
Instant download format provides immediate access to the manual's content.
Systems Covered:
Engine mechanicals, engine management (ECU), ignition system, fuel injection, emissions control, cooling system, exhaust components, clutch operation, manual transmission, driveline, power steering, braking system (ABS, DSC), suspension, wheel alignment, tire specifications, chassis and body structure, interior trim, exterior lighting, instrumentation and gauges, comfort and convenience features, wiring diagrams, diagnostic procedures.
Electrical Schematics:
Detailed wiring diagrams for all vehicle systems, including engine management, lighting, comfort features, and diagnostics.
Chassis And Body:
Body panel removal and installation, corrosion protection, jacking points, body repair techniques, trim component identification and removal.
Brake System Overhaul:
Procedures for brake pad and rotor replacement, caliper service, bleeding the brake system, ABS hydraulic unit troubleshooting and replacement.
Fuel System Diagnostics:
Testing fuel pressure, fuel injector diagnosis and replacement, fuel pump testing, fuel tank and line inspection.
Climate Control System:
Diagnosis and repair of the automatic climate control system, including blower motor, evaporator, heater core, and refrigerant management.
Procedures Included:
Scheduled maintenance tasks (oil changes, filter replacements, spark plugs), detailed repair procedures for all major mechanical and electrical systems, diagnostic troubleshooting steps, component replacement instructions, torque specifications, electrical system testing, component testing procedures, body repair guidelines, alignment specifications, fluid capacities and types, special tool requirements.
Troubleshooting Guides:
Step-by-step diagnostic procedures for common and complex faults, fault code interpretation (where applicable).
Resetting Service Indicators:
Guidance on how to reset the oil service and inspection interval indicators after maintenance.
Technical Depth:
Comprehensive factory-level detail, suitable for professional technicians and experienced DIY enthusiasts. Covers routine maintenance through major component overhauls and diagnostics.
Engine Rebuild Procedures:
Complete instructions for engine disassembly, inspection, repair, and reassembly, including piston ring installation, bearing replacement, valve train servicing, and crankshaft procedures.
Suspension And Steering Diagnostics:
Detailed procedures for diagnosing and repairing steering play, suspension noise, and alignment issues, including subframe and component replacement.
Transmission Rebuild:
Detailed overhaul instructions for both automatic and manual transmissions, including clutch pack replacement, valve body service, and gear synchronization (for manuals).
Diagnostic Tool Usage:
Information regarding the use of BMW's diagnostic tools and interfaces relevant to the E31's era, and common OBD-I/OBD-II fault code retrieval.
Primary Engine:
For 1995, the E31 8 Series was primarily offered with the 4.0L V8 (M60B40) and the 5.0L V12 (M70B50). The 4.4L V8 (M62B44) and the 5.6L V12 (S70B56) were also available in some markets or later model years.
M60B40 Horsepower:
282 hp @ 5800 rpm (approx.)
M60B40 Torque:
295 lb-ft @ 4500 rpm (approx.)
M70B50 Horsepower:
312 hp @ 5200 rpm (approx.)
M70B50 Torque:
332 lb-ft @ 3900 rpm (approx.)
Fuel System:
Bosch Motronic electronic fuel injection (EFI)
Engine Management:
BMW proprietary ECU control for fuel injection, ignition timing, and emission management.
Engine Type:
V8 (M60/M62) and V12 (M70/S70)
Engine Notes:
The M60 V8 engines are known for their smooth power delivery and excellent sound. The V12 engines are paragons of refinement and effortless torque. Both require meticulous maintenance to ensure longevity.
Length:
Approx. 4,785 mm (188.4 in)
Width:
Approx. 1,855 mm (73.0 in)
Height:
Approx. 1,370 mm (53.9 in)
Wheelbase:
Approx. 2,634 mm (103.7 in)
Curb Weight:
Varies by engine and options, typically ranging from 1,700 kg to 1,950 kg (3,750 lbs to 4,300 lbs).
Infotainment:
Early generation BMW Professional Radio/Cassette system, often with a CD changer option. Basic climate control, not the advanced iDrive system seen in later BMWs.
Driver Assistance:
ABS, optional ASC+T (Automatic Stability Control + Traction). Cruise control.
Connectivity:
Limited by modern standards. Primarily focused on the vehicle's internal systems and audio. No integrated Bluetooth or USB connectivity as standard.
Features:
Electric seat adjustment with memory, heated seats, power mirrors, power windows, remote central locking, automatic climate control.
Oil Change Interval:
Typically every 10,000-15,000 miles or 12 months, depending on driving conditions and BMW's specific service indicator system (often referred to as Condition Based Service or CBS in later iterations).
Spark Plug Replacement:
Varies by plug type (copper, platinum, iridium), but generally between 30,000-100,000 miles.
Coolant Flush:
Every 2-3 years or as recommended by BMW, often using BMW's blue or green coolant.
Engine Oil Type:
API SG/SH or higher, SAE 5W-30 or 5W-40 (check specific vehicle manual for exact BMW Longlife-01 or approved specifications).
Transmission Fluid Type Auto:
Dexron III or equivalent approved fluid (e.g., ZF Lifeguardfluid5 for ZF 4HP24).
Coolant Type:
BMW blue antifreeze/coolant (G48) or equivalent ethylene glycol-based coolant with corrosion inhibitors.
Differential Fluid:
SAE 75W-90 GL-5 or BMW approved synthetic gear oil. Capacity typically around 1.5 liters.
Known Issues:
ABS/ASC sensor failures, cooling system leaks (hose, water pump, expansion tank), fuel pump and sender unit issues, window regulator failures, electronic control unit (ECU) issues, starter motor wear, catalytic converter failure on high-mileage vehicles, VANOS system (on later M62 engines) can require service.
Battery Drain:
Electrical parasitic drains can be an issue due to complex electronics; proper diagnosis is key.
Oil Filter Example:
Example Part Number: Mann-Filter HU 925/4 X (V8 engine) or HU 714/1 X (V12 engine) – specific numbers vary.
Air Filter Example:
Example Part Number: Mann-Filter C 3430/1 (V8 engine) or C 35139 (V12 engine) – specific numbers vary.