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BMW E30 M3 1990 Service Repair Workshop Manual
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🏷️ Basic Information Identification Make: BMW Model: M3 Chassis Code: E30 Model Year: 1990 Codes Engine Code: S14B23 Internal Model Code: M3 Evolution III 👋 Introduction Market Position Vehicle Segment:...
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🏷️ Basic Information
Identification
Make:
BMW
Model:
M3
Chassis Code:
E30
Model Year:
1990
Codes
Engine Code:
S14B23
Internal Model Code:
M3 Evolution III
👋 Introduction
Market Position
Vehicle Segment:
Compact Executive Sports Coupe
Enthusiast Status:
Highly sought-after homologation special, iconic status
Competitive Analysis
Key Rivals:
Porsche 944, Ford Sierra RS Cosworth, Mercedes-Benz 190E 2.3-16
Key Features
Design Origin:
Touring car homologation special derived from the E30 3 Series platform
Aerodynamics:
Distinctive front air dam, rear spoiler, and side skirts
Chassis Enhancements:
Wider track, revised suspension geometry, M-specific chassis bracing
📋 Manual Details
Coverage Areas
Coverage Type:
Comprehensive Service, Repair, and Workshop
Page Count
Estimated Pages:
800+
Manual Type
Type:
Workshop Manual / Service Manual
Language
Language:
English
Format
Format:
Digital (likely PDF)
📖 Manual Coverage
Systems Covered
Engine:
S14B23 2.3L Inline-4 DOHC 16-valve
Fuel System:
Bosch Motronic M1.3 Fuel Injection, Fuel Pump, Injectors, Pressure Regulator
Ignition System:
Electronic Ignition, Spark Plugs, Coils, Ignition Control Module
Cooling System:
Radiator, Fan, Water Pump, Thermostat, Hoses, Coolant Specifications
Exhaust System:
Exhaust Manifold, Catalytic Converter, Muffler, Oxygen Sensor
Transmission:
Getrag 265 5-speed Manual Transmission
Clutch:
Clutch Assembly, Flywheel, Master/Slave Cylinders, Hydraulic Lines
Drivetrain:
Driveshaft, Universal Joints, Rear Differential, Axles
Suspension:
Front McPherson Struts, Rear Independent Suspension, Control Arms, Bushings, Sway Bars
Steering:
Power Steering System, Steering Rack, Tie Rods, Steering Column
Brakes:
Front and Rear Disc Brakes, ABS (Anti-lock Braking System), Brake Calipers, Master Cylinder, Fluid Specifications
Electrical System:
Battery, Alternator, Starter Motor, Fuses, Relays, Wiring Diagrams
Lighting System:
Headlights, Taillights, Interior Lights, Turn Signals
Interior:
Dashboard, Seats, Trim Panels, HVAC Controls
Bodywork:
Body Panels, Doors, Hood, Trunk, Bumpers, Aerodynamics
HVAC:
Air Conditioning System, Heater Core, Blower Motor, Controls
Procedures Included
Maintenance:
Routine Service, Oil Changes, Filter Replacements, Spark Plug Changes, Brake Fluid Flush
Repair:
Engine Rebuild, Transmission Overhaul, Suspension Component Replacement, Brake System Repair
Diagnostics:
Troubleshooting Common Issues, Fault Code Interpretation, Component Testing
Specifications:
Torque Values, Tolerances, Fluid Capacities, Electrical Schematics
Troubleshooting:
System-by-system fault finding guides
Technical Depth
Depth:
In-depth, suitable for professional mechanics and advanced DIY enthusiasts
Detail Level:
Step-by-step instructions, detailed diagrams, and technical explanations
📊 Manual Specifications
File Format
File Type:
PDF
Searchability:
Text-searchable for quick information retrieval
Print Quality
Resolution:
High-resolution scans for clear diagrams and text
Binding Type
Binding:
N/A (Digital)
Paper Type
Paper Quality:
N/A (Digital)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Naturally Aspirated Inline-4
Engine Code:
S14B23
Displacement:
2302 cc (2.3 Liters)
Bore X Stroke:
91 mm x 87 mm
Compression Ratio:
10.5:1
Valvetrain:
DOHC, 4 valves per cylinder
Performance
Horsepower:
218 hp (163 kW) @ 6750 rpm (European spec)
Torque:
230 Nm (170 lb-ft) @ 4750 rpm (European spec)
Fuel System
Fuel Delivery:
Bosch Motronic M1.3 Fuel Injection
Fuel Type:
Unleaded Premium (91+ Octane)
Ignition System
Ignition Type:
Distributorless Electronic Ignition (DIS)
🔧 Transmission
Standard
Type:
5-speed Manual
Manufacturer Model:
Getrag 265
Optional
Type:
Not Available for M3
Features
Differential:
Limited-Slip Differential (LSD) standard
Gear Ratios:
Refer to manual for specific ratios (dogleg 1st gear on some variants)
Fluid Specifications
Transmission Fluid:
BMW MTF LT-2 or equivalent (check manual for exact spec)
📐 Dimensions
Exterior
Length:
4346 mm (171.1 in)
Width:
1700 mm (66.9 in)
Height:
1370 mm (53.9 in)
Wheelbase:
2564 mm (100.9 in)
Front Track:
1471 mm (57.9 in)
Rear Track:
1480 mm (58.3 in)
Weights
Curb Weight:
1200 kg (2645 lbs) approx.
Gross Vehicle Weight Rating:
Refer to manual
Wheels Tires
Wheel Bolt Pattern:
5x120
Standard Wheel Size:
15 x 7 inches
Standard Tire Size:
205/55 VR 15
🛡️ Safety Features
Ratings
Crash Test Ratings:
NHTSA (US-spec relevant for period), IIHS. Refer to specific crash data if available.
Active Features
ABS:
Standard (Bosch ABS II)
Passive Features
Airbags:
Driver's airbag optional/late model, not standard on all 1990 models
Seatbelts:
3-point inertia reel seatbelts front
Rollover Protection:
Reinforced A-pillars, integrated roll bar structure (coupe)
💡 Technology Features
Infotainment
Radio:
Factory BMW Bavaria C II or similar cassette/radio system
Speakers:
Factory speaker system
Driver Assistance
ABS:
Bosch ABS II standard
Connectivity
Aux Input:
Not available from factory
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically 7,500 - 10,000 miles or 12 months (refer to manual for exact recommendation)
Spark Plug Replacement:
Refer to manual, typically 30,000 - 60,000 miles depending on plug type
Timing Belt Replacement:
S14 engine uses a timing chain, not a belt. Refer to manual for inspection.
Fluid Specifications
Engine Oil Capacity:
5.5 Liters (5.8 US Quarts)
Engine Oil Type:
Synthetic SAE 15W-50 or 20W-50 recommended for performance use (check manual for specific BMW approvals)
Coolant Type:
BMW Blue Antifreeze/Coolant (G48) or equivalent
Brake Fluid:
DOT 4 High-Temperature Brake Fluid
Known Issues
Engine Wear:
Potential for valve guide wear, VANOS issues (though S14 is not VANOS, early E30 engines had some issues), oil consumption
Suspension Bushings:
Wear on control arm bushings, rear trailing arm bushings
Rust:
Common E30 vulnerability, especially around wheel arches, rocker panels, and sunroof
Electrical Gremlins:
Aging wiring harnesses and connectors can lead to intermittent issues
Clutch Release Bearing:
Can be a wear item
📚 Vehicle History
Brand Heritage
Bmw Motorsport Division:
Developed by BMW M GmbH for Group A Touring Car homologation
Model Evolution
E30 Generation:
Fourth generation of BMW 3 Series
M3 Debut:
Introduced in 1986, significant updates for later models including 1990 Evolution III
Production
Production Years:
1986-1991 (E30 M3)
Total Production Units:
Approx. 17,970 (all E30 M3 variants)
Evolution Series:
Includes Evolution I, Evolution II, and Sport Evolution (often referred to as Evo III for later models)
🏆 Awards & Recognition
Recognitions
Motorsport Dominance:
Winner of numerous touring car championships worldwide (DTM, ETCC, etc.)
Enthusiast Acclaim:
Consistently ranked as one of the greatest driver's cars and modern classics
Certifications
Homologation Status:
Essential for BMW's racing efforts in Group A touring car series