Segment:
Luxury Grand Tourer (GT)
Competitors:
Porsche 944, Mercedes-Benz SEC, Jaguar XJ-S
Vehicle Attributes:
Elegant styling, powerful inline-six engine, comfortable ride, sporty handling, rear-wheel drive
Benefit To Owner:
Empowers owners and independent mechanics with the knowledge to maintain, diagnose, and repair the 635CSi effectively, preserving its classic status and performance.
Years Covered:
1983, 1984, 1985, 1986, 1987, 1988, 1989
Type:
Service Repair Workshop Manual
Format:
Digital (likely PDF)
Powertrain:
Engine mechanicals, fuel system, ignition system, cooling system, exhaust system, lubrication system
Drivetrain:
Transmission (manual & automatic), driveshaft, differential, axles
Chassis:
Suspension (front & rear), steering system, braking system
Electrical:
Wiring diagrams, lighting, instrumentation, battery, alternator, starter, engine control unit (ECU)
Body:
Body panels, doors, windows, interior trim, HVAC system
Maintenance:
Oil change, filter replacement, tune-up procedures, fluid checks and changes
Repair:
Engine overhaul, transmission rebuild, brake system service, suspension component replacement, electrical component diagnosis and repair
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault code interpretation
Diagnostics:
Detailed diagnostic flowcharts and procedures for all major systems
Depth:
Comprehensive from basic maintenance to complete engine and transmission rebuilds, including electrical system diagnostics
Digital Quality:
High-resolution, searchable PDF with clear diagrams and text
Print Readability:
Designed for clear printing of all pages, diagrams, and schematics
Physical Binding:
N/A (assuming digital format)
Physical Paper:
N/A (assuming digital format)
Engine Type:
Naturally aspirated, SOHC inline-six
Displacement:
3430 cc (3.4 Liters)
Bore X Stroke:
92 mm x 86 mm
Compression Ratio:
8.0:1 or 9.0:1 (depending on specific model year/market)
Horsepower Peak:
218 hp (163 kW) @ 5200 rpm (DIN)
Torque Peak:
333 Nm (246 lb-ft) @ 3500 rpm (DIN)
Fuel Delivery:
Bosch L-Jetronic (later Motronic) fuel injection
Recommended Fuel:
Premium Unleaded (91+ RON / 87+ AKI)
Coolant Type:
BMW Blue Longlife Coolant or equivalent ethylene glycol-based coolant
Type:
4-speed Getrag 265 manual transmission
Type:
3-speed ZF 4HP22 automatic transmission
Manual Gear Ratios:
Refer to manual for specific ratios (e.g., 3.72, 2.40, 1.44, 1.00)
Automatic Features:
Lock-up torque converter, sport mode (on some models)
Manual Fluid:
GL-4 Gear Oil, SAE 75W-90 or 80W-90 (check manual for specific BMW spec)
Automatic Fluid:
Dexron III or equivalent ATF
Crash Test Data:
Limited official data available for this era; designed with robust safety cage and crumple zones.
Braking System:
Four-wheel disc brakes, ventilated front discs, ABS (Anti-lock Braking System) optional/standard on later models
Seat Belts:
Three-point inertia-reel seatbelts (front), two-point lap belts (rear)
Structure:
Reinforced passenger cell, energy-absorbing steering column
Audio System:
Factory AM/FM stereo with cassette player, optional premium sound systems (e.g., Blaupunkt, Nakamichi on some models)
ABS:
Available as an option on early models, standard on later versions.
Cruise Control:
Standard feature
HVAC System:
Manual or optional automatic climate control
Seats:
Power adjustable front seats with memory (optional), lumbar support
Oil Change:
Every 5,000-7,500 miles or 6-12 months, whichever comes first
Major Service:
At 30,000, 60,000, 90,000 miles (includes spark plugs, fuel filter, air filter, coolant check/flush)
Engine Oil:
10W-40 or 20W-50 (API SG or higher), capacity 5.7 Liters (with filter)
Coolant Capacity:
Approx. 10.5 Liters
Common Wear Items:
Suspension bushings (control arms, sway bars), fuel injectors, fuel pump, radiator, water pump, flex discs (driveshaft)
Electrical Quirks:
Headlight relays, door lock actuators, dashboard illumination, window regulators
Engine Specific:
Head gasket leaks (less common on M30 but possible), valve stem seals, timing chain guides (though robust)
Oil Filter Example:
Mann-Filter W 107, Bosch 0 451 104 001 (verify specific fitment with BMW P/N)
Air Filter Example:
Mann-Filter C 2561 (verify specific fitment with BMW P/N)
Bmw Philosophy:
Building driver-focused, performance-oriented luxury vehicles with advanced engineering.
E24 Generation:
Produced from 1976 to 1989, the E24 coupe represented BMW's flagship luxury GT. The 635CSi, introduced in 1978, became the definitive performance model within the E24 line.
Facelift:
Received significant updates including aerodynamic changes (larger bumpers, revised grille) and powertrain enhancements during its lifecycle, particularly around 1982.
Production Period:
1976-1989 (E24 generation), 635CSi specifically from 1978-1989
Manufacturing Location:
Germany
