🏷️ Basic Information

Make:

BMW

Model:

318i

Model Generation:

E30

Product Name:

BMW 318i 1984-1990 Workshop Service Repair Manual

Engine Code Primary:

M10B18

👋 Introduction

Era Context:

The E30 generation BMW 3 Series represented a significant evolution for BMW, solidifying its reputation for sporty handling and build quality in the compact executive sedan segment.

Competitors:

Competed directly with the Mercedes-Benz 190E, Audi 80/90, and Alfa Romeo 75.

Driving Dynamics:

Renowned for its balanced chassis, rear-wheel-drive layout, and engaging driving experience, a hallmark of BMW.

Durability:

The M10 engine, though relatively simple, was known for its robustness and longevity when properly maintained.

📋 Manual Details

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Digital (Likely PDF, though not explicitly stated, common for this era)

Applicable Years:

1984, 1985, 1986, 1987, 1988, 1989, 1990

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures, including cylinder head, block, pistons, crankshaft, camshaft, timing, lubrication, and cooling systems.

Fuel System:

Bosch L-Jetronic fuel injection system diagnostics, maintenance, and repair; fuel pump, injectors, pressure regulator, fuel lines.

Ignition System:

Bosch ignition system maintenance, troubleshooting, coil, distributor, spark plugs, and timing adjustments.

Transmission Manual:

Repair, adjustment, and maintenance of the Getrag 260 5-speed manual transmission.

Transmission Automatic:

Service and repair procedures for the ZF 4HP22 automatic transmission (if applicable to specific 318i models covered).

Drivetrain Rear Axle:

Differential maintenance, lubrication, and repair; driveshaft and CV joint service.

Suspension Front:

MacPherson strut overhaul, control arms, bushings, ball joints, anti-roll bar.

Suspension Rear:

Semi-trailing arm system, shock absorbers, bushings, springs, anti-roll bar.

Steering:

Power steering system (if equipped), steering rack, tie rods, steering column.

Brakes Front:

Disc brake pad replacement, caliper overhaul, rotor service, brake line routing.

Brakes Rear:

Disc brake pad replacement, caliper overhaul, rotor service, parking brake mechanism.

Electrical System Charging:

Alternator testing, replacement, drive belt adjustment.

Electrical System Starting:

Starter motor testing and replacement, battery maintenance and testing.

Electrical System Lighting:

Headlights, taillights, interior lights, bulb replacement, wiring diagrams.

Electrical System Instruments:

Dashboard gauges, warning lights, speedometer, tachometer operation and troubleshooting.

Body Exterior:

Panel alignment, door mechanisms, hood and trunk latches, window regulators, glass replacement.

Body Interior:

Seat removal, dashboard disassembly, trim panel replacement, headliner.

HVAC System:

Heater core, blower motor, ventilation controls, air conditioning system servicing (if equipped).

Routine Maintenance:

Oil and filter changes, spark plug replacement, air filter replacement, fuel filter replacement, coolant flushes, brake fluid changes.

Troubleshooting:

Diagnostic flowcharts and procedures for common starting, running, and electrical issues.

Component Replacement:

Step-by-step instructions for replacing major and minor components across all systems.

Adjustments:

Valve adjustments, ignition timing, idle speed, clutch adjustment, parking brake adjustment.

Lubrication:

Detailed lubrication points and recommended lubricant types.

Wiring Diagrams:

Comprehensive electrical schematics for all vehicle systems.

Depth:

Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Covers full diagnostics, repairs, and overhauls.

Detail Level:

Detailed torque specifications, clearance measurements, and diagnostic fault codes.

📊 Manual Specifications

Digital Format:

Likely PDF, designed for digital access and searchability.

Scalability:

High resolution for clear viewing and printing of diagrams and text.

Binding:

N/A (Digital Format)

Paper Quality:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Inline-4 Cylinder, SOHC

Engine Code:

M10B18

Displacement:

1.8 Liters (1766 cc)

Bore X Stroke:

89.0 mm x 71.0 mm

Compression Ratio:

8.8:1 (typical)

Horsepower:

Approx. 101-105 hp @ 5800-6000 rpm (depending on market and specific tuning)

Torque:

Approx. 103-107 lb-ft @ 3250-3500 rpm (depending on market and specific tuning)

Fuel Injection:

Bosch LE-Jetronic (later models may have Motronic variations)

Fuel Type:

Unleaded Gasoline (Octane rating requirements specified in manual)

Cooling Method:

Liquid Cooled, Thermostatically Controlled

Oil Capacity:

Approx. 4.5 Liters (with filter change)

🔧 Transmission

Transmission Type Standard:

Getrag 260 5-Speed Manual

Transmission Type Optional:

ZF 4HP22 4-Speed Automatic (Less common on 318i but available)

Clutch Type:

Single Dry Plate, Hydraulic Operation

Gear Ratios Manual:

Specific ratios are detailed within the manual for the Getrag 260 gearbox.

Automatic Kickdown:

Feature of the ZF 4HP22 automatic transmission.

📐 Dimensions

Length:

Approx. 4325 mm (170.3 in)

Width:

Approx. 1678 mm (66.1 in)

Height:

Approx. 1380 mm (54.3 in)

Wheelbase:

Approx. 2565 mm (101.0 in)

Curb Weight:

Approx. 1150-1250 kg (2535-2755 lbs), depending on configuration.

Gross Vehicle Weight Rating:

Specified in vehicle documentation, typically around 1600 kg.

Wheel Bolt Pattern:

5x120 mm

Standard Tire Size:

175/70 HR 14 or 195/60 HR 14 (varies by market and trim)

🛡️ Safety Features

Crash Test Data:

While formal crash test ratings from organizations like NHTSA or Euro NCAP were less standardized and comprehensive in this era, the E30 chassis was engineered with a focus on occupant protection for its time. Specific data for the 318i may be limited.

ABS:

Optional on some models, not standard on all 318i variants during this period.

Seatbelts:

3-point inertia reel seatbelts in the front, lap belts in the rear (likely).

Body Structure:

Reinforced safety cage, crumple zones designed for the era.

💡 Technology Features

Radio Options:

Factory-installed BMW Bavaria C or similar cassette radios were common. Later models might have upgraded head units. Manual would cover basic wiring and installation for the period.

ABS Availability:

Optional, not a standard feature across all 1984-1990 318i models.

Features:

Limited connectivity by modern standards. Primarily focused on essential vehicle functions.

🔧 Maintenance

Oil Change Interval:

Typically every 7,500-10,000 miles or 12-15,000 km, or annually, whichever comes first (check manual for specific recommendations).

Spark Plug Replacement Interval:

Approx. 20,000-30,000 miles for standard plugs, longer for platinum/iridium if used in later variants.

Coolant Flush Interval:

Every 2-3 years or 30,000-40,000 miles.

Timing Belt Chain:

The M10 engine uses a timing chain, which typically does not require periodic replacement unless worn or noisy. The manual will detail inspection procedures.

Engine Oil Viscosity:

Refer to manual; common recommendations include 10W-40, 15W-40, or 20W-50 depending on climate and service.

Coolant Type:

BMW Blue/Green antifreeze (ethylene glycol based) mixed 50/50 with distilled water. Refer to manual for exact BMW specification.

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid. Manual will specify exact requirement.

Transmission Fluid Manual:

Refer to manual for GL-4 or GL-5 gear oil specifications (e.g., SAE 75W-90 or 80W-90).

Transmission Fluid Automatic:

Refer to manual for specific ZF 4HP22 ATF specification (e.g., Dexron II or equivalent).

Differential Fluid Type:

Hypoid gear oil (e.g., SAE 80W-90).

Engine M10:

While robust, potential issues include valve stem seals, oil leaks from the front crank seal, and cooling system component failure (hoses, radiator, thermostat) due to age. The L-Jetronic system can be sensitive to vacuum leaks and faulty airflow meter components.

Suspension:

Worn bushings (control arm, trailing arm, sway bar) are common due to age and mileage, affecting handling and ride quality. Shock absorber and strut failure.

Electrical:

Corrosion in wiring harnesses, aging relays, instrument cluster issues (e.g., tachometer, odometer), and fuel pump failure are common points of concern for vehicles of this age.

Rust:

Rust is a significant concern for E30s, particularly in the jacking points, rocker panels, rear wheel arches, and sunroof drainage areas. Proper inspection and maintenance are crucial.

Exhaust System:

Aging catalytic converters (if fitted), muffler, and exhaust manifold leaks.

📚 Vehicle History

Bmw Philosophy:

Continued BMW's tradition of building driver-focused, well-engineered vehicles.

E30 Introduction:

The E30 generation was introduced in 1982 as a successor to the E21 3 Series. The 318i variant was a core model, offering a balance of performance and economy.

Facelifts:

The E30 received a significant facelift (often referred to as 'Late Model' or 'Series 2') in late 1987/early 1988, with updated styling, suspension tweaks, and revised interior elements. This manual likely covers both pre-facelift and facelift models.

Production Years E30:

1982-1994 (Sedan/Coupe/Convertible/Touring), with the 318i being produced throughout the core sedan/coupe lifespan from 1984-1990.

Manufacturing Locations:

Primarily Dingolfing, Germany.

🏆 Awards & Recognition

Car And Driver 10Best:

The E30 generation 3 Series, including various engine variants, was a frequent recipient of Car and Driver's 10 Best lists during the 1980s, cementing its reputation as a benchmark sports sedan.

Overall Reputation:

Highly regarded for its driving dynamics, build quality, and longevity, making it a popular choice among enthusiasts and a collectible classic.