🏷️ Basic Information

Make:

BMW

Model:

6 Series (E24)

Specific Models:

633CSi, 635CSi, M6

Chassis Code:

E24

Generation Code:

E24

Engine Codes Covered:

M30 (various displacements and variants for 633CSi, 635CSi, and M6)

👋 Introduction

Vehicle Class:

Luxury Grand Tourer (GT)

Key Competitors Era:

Mercedes-Benz SEC Coupe (W126), Porsche 928, Jaguar XJ-S, Maserati Quattroporte

Design Philosophy:

Elegant styling, powerful inline-six engines, rear-wheel drive, focus on driver engagement and long-distance comfort. The E24 was renowned for its pillarless coupe design and dynamic handling for its size.

Manual Utility:

Essential resource for owners and technicians maintaining or repairing the E24 chassis, providing the detailed, accurate information needed to keep these classic BMWs in optimal condition.

📋 Manual Details

Coverage Years:

1983, 1984, 1985, 1986, 1987, 1988, 1989

Estimated Page Count:

High (typical workshop manuals of this era exceed 500 pages for comprehensive coverage)

Manual Type:

Workshop Service Repair Manual (FSM - Factory Service Manual equivalent)

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine Management:

Fuel Injection (Bosch L-Jetronic/Motronic), Ignition System (Distributor, Coil, Spark Plugs), Engine Control Unit (ECU) diagnostics and troubleshooting

Engine Mechanical:

Engine block, Cylinder head removal and assembly, Valvetrain (Valves, Springs, Lifters, Camshafts), Crankshaft, Connecting Rods, Pistons, Lubrication System (Oil pump, Oil filter, Oil pan, Oil pressure testing), Cooling System (Radiator, Water pump, Thermostat, Hoses, Fan, Coolant types), Camshaft timing chain and tensioner

Transmission:

Automatic Transmission (e.g., ZF 4HP22) and Manual Transmission (e.g., Getrag 5-speed) removal, installation, overhaul, and troubleshooting. Clutch operation and adjustment.

Brakes:

Hydraulic brake system (master cylinder, brake lines, calipers, wheel cylinders), Brake pads and discs, Parking brake system, ABS (Anti-lock Braking System) operation and components (if equipped)

Electrical:

Complete Wiring Diagrams, Starter system, Charging system (Alternator), Battery, Lighting systems (Headlights, Taillights, Interior), Gauges and instruments, Power windows, Central locking, Wiper system, Horn, Fuse and relay identification and testing

Body And Chassis:

Body panels, Doors, Hood, Trunk, Bumpers, Glass, Seats, Interior trim, Suspension (Front MacPherson struts, Rear trailing arms), Steering system (Power steering pump, Rack and pinion), Exhaust System (Mufflers, Catalytic converter, Pipes)

Climate Control:

Heating system operation and repair, Air Conditioning system (Compressor, Condenser, Evaporator, Refrigerant charge, Troubleshooting)

Routine Maintenance:

Oil and filter changes, Air filter replacement, Spark plug replacement, Coolant flushing and replacement, Brake fluid flush, Belt inspection and replacement, Battery maintenance

Diagnostics And Troubleshooting:

Step-by-step diagnostic procedures for common issues, fault code interpretation (where applicable), voltage and resistance testing for electrical components, pressure testing for fuel and lubrication systems

Major Repairs:

Engine rebuild procedures, Cylinder head overhaul, Transmission overhaul (both automatic and manual), Suspension component replacement, Steering system repair, Brake system overhaul, Electrical component replacement and repair

Assembly And Disassembly:

Detailed instructions for removing and reinstalling all major components and sub-assemblies, including torque specifications for critical fasteners

Depth Of Coverage:

Comprehensive - covers everything from basic fluid changes to complete engine and transmission rebuilds, including detailed electrical diagnostics and wiring diagrams.

📊 Manual Specifications

File Type:

PDF

Image Resolution:

Typically high resolution allowing for clear reproduction of diagrams, schematics, and text. Suitable for printing.

Binding For Physical Copy:

N/A (Digital Format)

Paper Type For Physical Copy:

N/A (Digital Format)

Text Search Capability:

Likely searchable PDF, allowing users to quickly find specific topics or keywords.

⚙️ Engine Specifications

Engine Family:

BMW M30 Inline-6

633Csi Engine:

3.2L (3210 cc) M30B32 inline-six, ~197 hp, ~285 Nm torque (Euro Spec), ~170 hp (US Spec)

635Csi Engine:

3.4L (3430 cc) M30B34 inline-six, ~218 hp, ~305 Nm torque (Euro Spec), ~182 hp (US Spec)

M6 Engine:

3.5L (3453 cc) S38B35 inline-six (often referred to as M88/3 derivative), ~256 hp, ~330 Nm torque (Euro Spec), ~210 hp (US Spec)

Compression Ratio:

Varies by model and market, typically around 8.0:1 to 10.0:1

Bore X Stroke:

Varies by displacement (e.g., 92 mm x 76.8 mm for 3.2L, 92 mm x 86 mm for 3.4L, 93.4 mm x 84 mm for 3.5L S38)

Fuel Delivery:

Bosch Motronic or L-Jetronic fuel injection system

Fuel Type:

Unleaded gasoline (premium octane recommended)

Ignition Type:

Electronic Ignition with Distributor (or distributorless in some later variants/market specifics)

🔧 Transmission

Standard Transmission Type:

Often a 4-speed automatic transmission (e.g., ZF 4HP22) for many models and markets. Manual transmissions were also common, especially in Europe.

Optional Transmission Type:

Getrag 5-speed manual transmission (e.g., 265 series) was a popular option, particularly on the 635CSi and M6.

Transmission Features:

Sport mode on automatics, limited-slip differential (optional or standard on M6)

Automatic Transmission Fluid:

Dexron II or equivalent (refer to manual for exact BMW specification)

Manual Transmission Fluid:

GL-4 or GL-5 gear oil, SAE 75W-90 or 80W-90 (refer to manual for exact BMW specification)

📐 Dimensions

Length:

Approx. 4.9m (193 inches)

Width:

Approx. 1.7m (67 inches)

Height:

Approx. 1.4m (55 inches)

Wheelbase:

Approx. 2.7m (107 inches)

Curb Weight:

Approx. 1500-1600 kg (3300-3500 lbs), depending on model and equipment

🛡️ Safety Features

Safety Ratings:

NHTSA/Euro NCAP ratings from this era are not directly comparable to modern standards. Primary safety features focused on structural integrity and driver control.

Anti Lock Brakes:

ABS was optional on most E24 models and standard on some later or performance variants (like the M6).

Traction Control:

Not typically available on these models.

Airbags:

Driver's side airbag became available in later years (around 1987-1988) as an option. Passenger airbags were not common.

Seatbelts:

3-point inertia-reel seatbelts

💡 Technology Features

Audio System:

Premium sound systems available (e.g., Blaupunkt or Bavaria), often with cassette player. Features varied by year and options.

Cruise Control:

Optional cruise control system available on most models.

Connectivity Features:

Basic in-car connectivity; primarily focused on radio and driver controls, not modern digital integration.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles or annually, whichever comes first (refer to manual for precise recommendation based on driving conditions).

Spark Plug Replacement:

Every 15,000-20,000 miles, depending on plug type (e.g., standard copper vs. platinum).

Coolant Flush:

Every 2-3 years or 30,000 miles.

Engine Oil Specification:

API SG or SH, ACEA A2-96 or A3-98, Viscosity typically 10W-40 or 20W-50 (depending on climate and specific engine variant, consult manual).

Coolant Type:

Ethylene glycol based antifreeze, typically BMW blue or green coolant (50/50 mix with distilled water).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid (check reservoir cap or manual).

Common Problems Engine:

Oil leaks from valve cover gasket, oil pan gasket, rear main seal. Head gasket failure can occur. Timing chain tensioner wear. Fuel injector issues with age.

Common Problems Electrical:

Corrosion in wiring harnesses, fuel pump relay failure, instrument cluster issues, power window regulator failure.

Common Problems Suspension Steering:

Worn control arm bushings, worn ball joints, power steering leaks, steering damper failure.

Common Problems Body:

Rust in common E24 areas (e.g., jacking points, rear wheel arches, sunroof panel). Door seal degradation.

📚 Vehicle History

Bmw Performance Legacy:

The E24 6 Series continued BMW's tradition of building driver-focused, high-performance luxury vehicles with a strong emphasis on engineering and driving dynamics.

E24 Production Run:

1976-1989, with the specific models and updates covered in this manual from 1983-1989.

Facelifts And Updates:

The E24 received a significant facelift in 1982, introducing updated aerodynamics, interior revisions, and the larger 3.5-liter engine for the 635CSi.

Manufacturing Location:

Dingolfing, Germany

M6 Significance:

The M6 (or M635CSi in Europe) was a homologation special for motorsport, featuring the potent M88 engine from the M1 supercar, making it a highly desirable and collectible performance coupe.

🏆 Awards & Recognition

Automotive Press Acclaim:

Consistently praised by automotive journalists of the era for its elegant styling, powerful engines, and superior handling characteristics compared to many competitors. Often considered one of the most beautiful BMWs ever produced.