🏷️ Basic Information

Make:

BMW

Model:

E24 6 Series

Trim:

635CSi / M6

Year:

1988

Chassis Code:

E24

Engine Code 635Csi:

M30B34

Engine Code M6:

S38B35

👋 Introduction

Target Audience:

Technicians, mechanics, and car owners seeking to repair or learn about their E24.

Advantage:

Comprehensive electronic troubleshooting focus, factory-level data, instant access at a low price.

Data Integrity:

Technical data kept like original manufacturer book.

Accessibility:

Instant download, no waiting for physical delivery.

Support:

Direct contact available for concerns or download issues.

📋 Manual Details

Primary Focus:

Electronic Troubleshooting

Secondary Focus:

General Maintenance and Repair

Estimated Pages:

Hundreds to Thousands (Printable)

Type:

Factory Service Repair Manual (Electronic Troubleshooting Focused)

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine:

Comprehensive engine service and repair, including fuel injection and emission systems.

Transmission:

Service and repair for both manual and automatic transmissions.

Brakes:

Detailed coverage of the brake system, including components and troubleshooting.

Electrical:

Extensive coverage of the electrical system, including wiring diagrams and electronic troubleshooting.

Suspension:

Service and repair for the suspension system.

Steering:

Detailed information on the steering system.

Cooling System:

Service and maintenance for the cooling system.

Fuel System:

Comprehensive coverage of the fuel system, including injection and delivery.

Emission System:

Information pertaining to the emission control system.

HVAC:

Heater and Air Conditioning system service and repair.

Chassis Body:

Details on chassis and bodywork.

Restraint System:

Information regarding the vehicle's restraint systems (seatbelts, etc.).

Interior:

Coverage of interior components and systems.

Drivetrain:

Differential and axle service/repair.

Diagnostics:

Extensive troubleshooting procedures for electronic and mechanical systems.

Maintenance:

General maintenance procedures, periodic lubrication, and service checklists.

Repair:

Detailed repair instructions for all major vehicle systems.

Wiring Diagrams:

Inclusion of complete and detailed wiring diagrams.

Engine Control System:

Detailed diagnostics and repair procedures for the engine control unit and associated sensors.

Level Of Detail:

Factory level technical data, suitable for professional technicians and enthusiasts.

Diagnostics Support:

Specific diagnostic procedures and datasheets for circuits and equipment.

📊 Manual Specifications

Compatibility:

All Versions of Windows & Mac

Requirements:

Adobe PDF Reader & WinZip (for larger files)

Quality:

Great Quality, Printable Pages

Type:

Digital Download (Implied)

Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Inline 6-cylinder, SOHC

Displacement:

3.4 liters (3430 cc)

Bore X Stroke:

92 mm x 86 mm

Compression Ratio:

8.0:1 or 8.5:1 (market dependent)

Horsepower:

218 PS (215 hp) @ 5700 rpm (DIN)

Torque:

310 Nm (229 lb-ft) @ 4000 rpm (DIN)

Fuel System:

Bosch L-Jetronic Fuel Injection

Ignition System:

Electronic Ignition

Engine Type:

Inline 6-cylinder, DOHC, 24 valves

Displacement:

3.5 liters (3453 cc)

Compression Ratio:

10.5:1

Horsepower:

256 hp @ 6500 rpm (US Market)

Torque:

330 Nm (243 lb-ft) @ 5000 rpm (US Market)

Fuel System:

Bosch Motronic Fuel Injection

🔧 Transmission

Transmission Type 635Csi:

Getrag 4-speed Automatic (ZF 4HP22)

Transmission Type 635Csi Manual:

Getrag 5-speed Manual

Transmission Type M6:

Getrag 5-speed Manual

Automatic Fluid:

Dexron III (or equivalent, refer to manual for exact spec)

Manual Fluid:

BMW MTF LT-2 (or equivalent, refer to manual for exact spec)

📐 Dimensions

Length:

4,730 mm (186.2 in)

Width:

1,798 mm (70.8 in)

Height:

1,380 mm (54.3 in)

Wheelbase:

2,795 mm (110.0 in)

Curb Weight 635Csi:

~1,600 - 1,700 kg (3,527 - 3,748 lbs) depending on options

Curb Weight M6:

~1,700 kg (3,748 lbs)

Wheel Bolt Pattern:

5x120 mm

Typical Tire Size 635Csi:

205/70 VR 14 or 225/55 VR 15

Typical Tire Size M6:

225/50 VR 16

🛡️ Safety Features

ABS:

Available on some models, especially M6.

Airbags:

Driver airbag not standard for the entire model run, but became more common later.

Seatbelts:

Three-point inertia reel seatbelts front and rear.

💡 Technology Features

Audio System:

Factory AM/FM stereo cassette player, often with premium sound options.

Climate Control:

Manual or automatic climate control systems.

Cruise Control:

Standard on most models.

Connectivity Features:

Limited by era; typically manual antenna adjustment, speaker balance/fader.

🔧 Maintenance

Oil Change:

Typically every 7,500-10,000 miles or 12-18 months (refer to manual for exact interval).

Transmission Fluid Service:

Every 30,000-60,000 miles for automatic, often 'lifetime' for manuals but fluid change recommended.

Spark Plugs:

Typically around 30,000 miles for the M30 engine.

Engine Oil Type:

10W-40 or 20W-50 (API SG/SH or higher, consult manual for exact viscosity and spec)

Coolant:

BMW Antifreeze/Coolant (blue or green ethylene glycol based, 50/50 mix with distilled water)

Engine Oil Capacity 635Csi:

~6.5 liters (6.9 US quarts)

Engine Oil Capacity M6:

~6.5 liters (6.9 US quarts)

Cooling System Capacity:

~10-12 liters (10.6-12.7 US quarts)

Common Problems:

Harness degradation (especially under dash), fuel distributor issues (K-Jetronic), fuel pump failure, differential seals, suspension bushings, window regulators, potential head gasket issues (especially if overheated).

Electronic Trouble Areas:

Air flow meter sensors, idle control valves, temperature sensors, ABS control module, dashboard warning lights and indicators.

📚 Vehicle History

Brand Focus:

BMW's legacy in performance luxury grand tourers.

E24 Generation:

First generation of BMW's 6 Series coupes, produced from 1976 to 1989.

1988 Updates:

Likely received minor updates as part of the E24's mid-cycle refreshes. The M6 (internationally known as M635CSi) was a significant performance variant introduced earlier.

Production Period:

1976-1989 (E24 platform)

Manufacturing Location:

Germany

🏆 Awards & Recognition

Automotive Press:

The E24 6 Series, particularly the M6, was critically acclaimed for its performance, handling, and luxurious GT capabilities by automotive journalists of its time.