🏷️ Basic Information

Make:

BMW

Model:

318i

Chassis Code:

E30

Model Code Range:

1984-1990

👋 Introduction

Segment Placement:

Compact executive sedan/coupe, renowned for its sporty handling, build quality, and driver engagement.

Target Audience:

Enthusiasts, DIY mechanics, and professional repair shops seeking to maintain and restore the BMW 318i (E30).

Key Competitors:

Mercedes-Benz 190E (W201), Audi 80/90, Alfa Romeo 75, Ford Sierra.

Vehicle Attributes:

Rear-wheel drive, balanced chassis, durable powertrain, classic BMW design language, driver-focused interior.

📋 Manual Details

Primary Focus:

Service, Repair, Workshop

Estimated Pages:

Extensive (typically 800-1200+ pages for comprehensive workshop manuals of this era)

Type:

Factory-authorized Service and Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Powertrain:

Engine (M10B18), Fuel System, Ignition System, Exhaust System, Cooling System

Drivetrain:

Transmission (Manual & Automatic), Clutch, Driveshafts, Differential, Axles

Chassis:

Suspension (Front & Rear), Steering System, Brakes (Front & Rear), Wheels & Tires

Electrical:

Starting System, Charging System, Lighting, Instruments & Gauges, Wiper/Washer System, Horn, Power Windows/Locks (if equipped), Audio System

Body:

Body Panels, Doors, Hood, Trunk, Bumpers, Interior Trim, HVAC System, Seats, Safety Restraints

Fuel System Details:

Fuel pump testing, fuel pressure regulation, injector cleaning and replacement, cold start valve operation, fuel tank and lines.

Ignition System Details:

Spark plug specifications, ignition coil testing, distributor maintenance, timing adjustments, ignition control module diagnosis.

Routine Maintenance:

Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt adjustments

Troubleshooting:

Diagnostic flowcharts, symptom-based problem solving, electrical troubleshooting diagrams

Repair Rebuild:

Engine component overhaul, transmission repair, brake caliper replacement, suspension component replacement, electrical component diagnosis and repair

Specifications Data:

Torque values, clearances, fluid capacities, electrical resistance values, diagnostic parameters

Engine Mechanical:

Compression testing, cylinder head removal and installation, piston and connecting rod service, crankshaft bearing checks.

Electrical Schematics:

Full wiring diagrams for all major systems, including engine management, lighting, and accessories.

Level Of Detail:

Comprehensive: From basic fluid checks to complete engine and transmission rebuilds, including detailed electrical schematics and diagnostic procedures.

Diagnostic Tools:

Covers use of specialized tools and techniques common in BMW service centers of the era.

📊 Manual Specifications

Format Details:

Searchable PDF, allowing for quick access to specific sections and keywords.

Quality:

High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Code:

M10B18

Engine Type:

Inline 4-cylinder, SOHC (Single Overhead Camshaft)

Displacement:

1.8 Liters (1766 cc)

Horsepower:

Approx. 105 hp @ 5800 rpm

Torque:

Approx. 107 lb-ft @ 3250 rpm

Induction:

Bosch L-Jetronic Fuel Injection

Fuel Type:

Unleaded Gasoline (87-91 Octane recommended)

Configuration:

Front-engine, Rear-wheel drive

🔧 Transmission

Type:

4-speed Manual (Getrag 245)

Type:

3-speed Automatic (ZF 3HP22)

Drivetrain:

Rear-Wheel Drive (RWD)

📐 Dimensions

Wheelbase:

Approx. 101.2 inches (2570 mm)

Length:

Approx. 170.1 inches (4320 mm)

Width:

Approx. 65.7 inches (1670 mm)

Height:

Approx. 55.1 inches (1400 mm)

Curb Weight:

Approx. 2600-2800 lbs (1180-1270 kg), depending on body style and transmission

Seating Capacity:

5 passengers

🛡️ Safety Features

Crash Test Era:

Tested under early safety standards; comprehensive modern ratings are not directly applicable. Known for robust unibody construction for its time.

Braking:

Front: Ventilated Discs; Rear: Drums (standard). ABS optional on later models.

Restraints:

3-point seatbelts (front and rear), optional driver-side airbag (late models).

Body Structure:

Reinforced safety cell, crumple zones.

💡 Technology Features

Audio System:

Basic AM/FM radio with cassette player, often with optional premium sound system.

ABS:

Anti-lock Braking System (ABS) was an optional feature on later models.

Features:

Minimal by modern standards; primarily focused on mechanical systems and basic electrical functions.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000 - 7,500 miles or 6-12 months (refer to manual for exact recommendation based on driving conditions).

Major Service:

Includes timing belt inspection/replacement (if applicable for specific engine variants, though M10 is chain-driven), spark plugs, and other component checks at 30,000 - 60,000 mile intervals.

Engine Oil:

API SG or higher, SAE 20W-50 or 15W-40 recommended for M10 engine (check manual for specific viscosity based on climate).

Coolant:

BMW Blue Antifreeze/Coolant (50/50 mixture with distilled water), or equivalent ethylene glycol-based coolant.

Transmission Fluid Manual:

GL-4 Gear Oil, SAE 75W-90 or 80W-90.

Transmission Fluid Automatic:

Dexron III/Mercon ATF (Automatic Transmission Fluid).

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Power Steering Fluid:

ATF Dexron III/Mercon compatible fluid.

Common Problems:

Rust (wheel wells, rockers, battery tray), fuel distributor leaks (L-Jetronic), idle control valve issues, cooling system component failures (hoses, water pump), worn front suspension bushings, dashboard cracking.

Electrical Common Faults:

Headlight switch failure, door wiring harness degradation, intermittent gauge operation.

📚 Vehicle History

Legacy:

BMW's reputation for 'The Ultimate Driving Machine' was solidified with the E30 platform, known for its engineering and performance.

E30 Lineage:

The 318i was an entry-level model in the E30 range, offering a balance of efficiency and BMW driving dynamics. It evolved from the earlier M10-powered models.

Engine Updates:

The M10 engine, while robust, was an older design. Later E30 models saw the introduction of the more advanced M40 engine in some markets, but this manual specifically covers the M10 in the 318i.

Production Years:

The E30 series was produced from 1982 to 1994, with the 318i variant specific to the 1984-1990 period covered by this manual.

🏆 Awards & Recognition

Automotive Press:

The E30 3 Series, in general, was widely praised by automotive journalists for its driving dynamics, build quality, and overall performance, consistently ranking high in its class.