Positioning:
The BMW 3 Series (E30) was a pivotal model for BMW, solidifying its reputation for sporty handling and build quality in the compact executive sedan segment. The 318i represented the entry-level gasoline engine option for many markets during its production run.
Competitors:
Competed against vehicles like the Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, and Peugeot 405.
Chassis Design:
Rear-wheel drive platform, independent front suspension with MacPherson struts, semi-trailing arm rear suspension, known for excellent driving dynamics.
Engine Configuration:
Inline-four cylinder engine, known for its robustness and rev-happy nature.
Value Proposition:
This comprehensive workshop manual provides enthusiasts and mechanics with the detailed information necessary to maintain, diagnose, and repair the BMW 318i (E30) model from 1984-1990, crucial for preserving these classic vehicles.
Covered Years:
1984, 1985, 1986, 1987, 1988, 1989, 1990
Manual Type:
Workshop Service Repair Manual
Format:
PDF (Digital Download)
Engine:
Complete engine overhaul, troubleshooting, diagnostics, fuel injection (Bosch L-Jetronic/Motronic), ignition system, cooling system, lubrication system, exhaust system.
Transmission:
Manual and automatic transmission repair, clutch service, driveshaft, differential service.
Chassis:
Suspension (front struts, rear semi-trailing arms), steering system (rack and pinion), brake system (disc/drum, ABS diagnostics if equipped), wheel alignment specifications.
Electrical:
Complete wiring diagrams, fuse box locations, lighting systems, instrument cluster, power accessories, starter, alternator, battery troubleshooting.
Body:
Body panel repair, interior trim removal/installation, glass replacement, door mechanisms, body sealing, rust prevention.
Maintenance:
Routine maintenance schedules, oil changes, filter replacements, tune-up procedures, spark plug replacement, belt replacement.
Repair:
Component-level repair, part replacement, diagnostic procedures for common faults, engine rebuild procedures.
Troubleshooting:
Systematic diagnostic flowcharts, identification of common problems and their solutions.
Specifications:
Torque specifications, clearances, fluid capacities, electrical component resistance values.
Depth:
Comprehensive, covering basic maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures.
Engine Type:
Naturally Aspirated Inline-4 Cylinder
Displacement:
1.8 Liters (approx. 1766 cc for earlier models, later 1795 cc)
Bore X Stroke:
Varies slightly by specific M10 iteration, e.g., 89 mm x 71 mm
Horsepower:
Approximately 101-105 hp @ 5500-5800 rpm (depending on market and year)
Torque:
Approximately 103-110 lb-ft @ 3250-3500 rpm (depending on market and year)
Fuel Delivery:
Bosch L-Jetronic or Motronic electronic fuel injection (EFI).
Fuel Type:
Unleaded Gasoline (typically 91-95 RON)
Ignition Type:
Electronic ignition with distributor or distributorless ignition system (DIS) on later models.
Cooling Type:
Water-cooled, pressurized system with thermostatic control.
Oil Capacity:
Approx. 4.5 liters (4.8 US quarts) with filter change.
ECU Type:
Bosch Motronic or L-Jetronic control units.
Transmission Type:
4-speed or 5-speed manual transmission.
Transmission Type:
3-speed or 4-speed ZF automatic transmission.
Clutch:
Hydraulically operated single dry plate clutch.
Differential:
BMW's robust rear differential, various ratio options available.
Manual Transmission Fluid:
GL-4 Gear Oil, typically SAE 75W-90 or 80W-90.
Automatic Transmission Fluid:
Dexron III or equivalent ATF.
Body Styles:
2-door sedan (Saloon), 4-door sedan (Saloon), Convertible, Touring (Wagon - less common for 318i).
Wheelbase:
Approx. 2570 mm (101.2 inches)
Length:
Approx. 4325 mm (170.3 inches) for sedan
Width:
Approx. 1640 mm (64.6 inches)
Height:
Approx. 1370 mm (53.9 inches) for sedan
Curb Weight:
Approx. 1150-1250 kg (2535-2755 lbs) depending on body style and equipment.
Crash Test Performance:
Early E30 models pre-date standardized modern crash testing. Safety features focused on structural integrity of the period. Later models received minor safety updates.
Braking System:
Front ventilated disc brakes, rear drum brakes (some later models/trims offered rear discs). ABS optional on some models.
Seat Belts:
Three-point inertia reel seatbelts for front occupants, two-point lap belts for rear passengers (later models often had three-point rear belts).
Steering Column:
Collapsible steering column designed to absorb impact energy.
Audio System:
Factory AM/FM radio with cassette player, often with separate amplifier and speaker options. Aftermarket head units are very common.
Instrument Cluster:
Analog gauges for speedometer, tachometer, fuel level, and engine temperature. Warning lights for various systems.
ABS:
Anti-lock Braking System (ABS) was optional on some models and trim levels, typically the 'iS' variants or higher-spec models.
Connectivity Features:
Limited to basic audio input. No factory Bluetooth or USB connectivity on original models.
Oil Change Interval:
Every 7,500-10,000 miles or 12 months, whichever comes first (depending on driving conditions and oil used).
Air Filter Replacement:
Inspect every 15,000 miles, replace as needed or every 30,000 miles.
Spark Plug Replacement:
Typically every 30,000 miles for standard plugs, longer for platinum/iridium if fitted.
Timing Belt Replacement:
Not applicable, the M10 engine uses a timing chain.
Engine Oil Specification:
API SG or higher, SAE 10W-40 or 15W-40 is common. Check manual for specific viscosity based on temperature. Synthetic oils are often recommended.
Coolant Specification:
Ethylene glycol based antifreeze mixed 50/50 with distilled water. BMW recommends specific coolant types (e.g., BMW Blue or G48 equivalent).
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid. Flush and replace every 2 years.
Common Problems:
Cooling system leaks (radiator, hoses, water pump), fuel distributor issues (L-Jetronic), idle control valve problems, door seal degradation, rust in common areas (wheel arches, rockers), suspension component wear (bushings, ball joints).
Engine Wear:
Oil consumption can increase with age and mileage; valve stem seals are a common wear item.
Bmw Philosophy:
BMW's long-standing reputation for building driver-focused, well-engineered automobiles.
E30 Introduction:
The E30 generation replaced the E21 3 Series and was produced from 1982 to 1994 (with the sedan ending earlier in many markets). It introduced coupe, convertible, and touring body styles to the 3 Series line.
Production Period:
1982-1994 (overall E30 generation), 318i specifically from 1982-1991.
Major Updates:
Facelift models introduced around 1987/1988 brought updated bumpers ('I-Rechen'), revised interior elements, and minor mechanical revisions.
Automotive Press Reviews:
The E30 generation was widely praised by automotive journalists for its sharp handling, build quality, and sporty character, earning it a strong following and critical acclaim throughout its production.
Collector Status:
E30 models, including the 318i, are considered modern classics and are highly sought after by enthusiasts for their driving purity and timeless design.
