BMW 325i 325is 1986 Full Service Repair Manual

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🏷️ Basic Information Identification Make: BMW Model: 3 Series Sub Model: 325i, 325is Year: 1986 Codes Chassis Code: E30 Engine Code: M20B25 👋 Introduction Market Position Market Segment: Compact luxury...

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类型: Car

斯库: 429320

标签: 1986 325i 325is BMW Car Cars Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

3 Series

Sub Model:

325i, 325is

Year:

Codes

Chassis Code:

Engine Code:

M20B25

👋 Introduction

Market Position

Market Segment:

Compact luxury sports sedan/coupe.

Target Audience:

Enthusiasts and owners seeking to maintain, repair, or restore their E30 325i/is.

Competitive Analysis

Key Competitors:

Mercedes-Benz 190E, Audi 80/90, Alfa Romeo Milano.

Key Features

Vehicle Reputation:

Renowned for its driving dynamics, handling, and build quality.

Manual Value Proposition:

Provides the detailed technical knowledge required for DIY maintenance and advanced repairs, extending the life and performance of a classic vehicle.

📋 Manual Details

Coverage Areas

Manual Type:

Full Service Repair Manual

Language:

English

Format:

Print (likely)

Page Count

Estimated Page Count:

Extensive, likely over 800 pages

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Engine disassembly, assembly, rebuild, tuning, timing, valve train, lubrication, cooling.

Engine Electrical:

Ignition system, fuel injection system (Bosch Motronic), starting system, charging system, sensors, ECU.

Fuel System:

Fuel tank, pump, lines, injectors, pressure regulator, EFI system.

Transmission:

Manual and Automatic transmission service, clutch, drive shafts, differentials.

Brakes:

Hydraulic system, ABS (if equipped), front and rear brake overhaul, parking brake.

Suspension:

Front and rear suspension components, struts, shocks, control arms, bushings, steering linkage.

Steering:

Power steering system, steering column, rack and pinion.

Electrical System:

Wiring diagrams, lighting, instruments, power windows, mirrors, central locking, HVAC blower.

Body And Frame:

Body panel repair, doors, windows, locks, trim, rust prevention, undercoating.

HVAC:

Heating, ventilation, and air conditioning system service and repair.

Procedures Included

Basic Maintenance:

Oil changes, filter replacements, fluid checks, spark plug replacement, brake pad inspection.

Intermediate Repair:

Component replacement (e.g., alternator, starter, fuel pump, radiator), brake caliper rebuild, CV joint replacement.

Advanced Repair:

Engine overhaul, transmission rebuild, differential service, complex electrical diagnostics, body panel alignment.

Troubleshooting:

Diagnostic charts, symptom-based problem solving, common failure modes.

Restoration:

Guidance on refurbishing and rebuilding components for historical accuracy.

Specifications:

Torque specifications, clearances, fluid capacities, electrical specifications.

Technical Depth

Diagnostic Depth:

Comprehensive diagnostic procedures for all major systems, including fuel injection and ignition.

Rebuild Depth:

Detailed step-by-step instructions for complete engine, transmission, and differential rebuilds.

Electrical Diagrams:

Complete, high-quality wiring diagrams for all vehicle circuits.

📊 Manual Specifications

File Format

Digital Format:

Likely PDF if digital, optimized for printing.

Print Quality

Print Quality:

High resolution for clear diagrams and text.

Binding Type

Binding Type:

Professional perfect binding or spiral bound for durability in a workshop environment.

Paper Type

Paper Type:

Durable, semi-gloss paper stock to withstand workshop conditions.

⚙️ Engine Specifications

Primary Engine

Engine Type:

Inline 6-cylinder, naturally aspirated

Engine Code:

M20B25

Displacement:

2494 cc (2.5 Liters)

Performance

Horsepower:

168 hp @ 5800 rpm

Torque:

164 lb-ft @ 4300 rpm

Fuel System

Fuel Delivery:

Bosch LE-Jetronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline (91 RON minimum recommended)

Ignition System

Ignition Type:

Distributorless Ignition System (DIS) or Distributor-based (depending on specific ECU and production date).

Cooling System

Cooling Type:

Water-cooled, thermostatically controlled.

🔧 Transmission

Standard

Transmission Type:

Getrag 260 5-speed manual transmission

Optional

Transmission Type:

ZF 4HP22 4-speed automatic transmission

Features

Clutch Type:

Hydraulically actuated single dry plate clutch

Differential:

Rear-wheel drive with limited-slip differential (LSD) optional on 325i, standard on 325is.

📐 Dimensions

Exterior

Body Styles:

2-door Sedan (E30/2), 4-door Sedan (E30/4), Convertible (E30/2C).

Wheelbase:

2570 mm (101.2 in)

Length:

4340 mm (170.9 in)

Width:

1670 mm (65.7 in)

Height:

1380 mm (54.3 in)

Weights

Curb Weight:

Approx. 1300-1400 kg (2866-3086 lbs) depending on body style and options.

🛡️ Safety Features

Ratings

Crash Test Ratings:

As per 1980s standards, likely performed basic frontal and side impact tests. Later models may have improvements.

Active Features

Anti-lock Braking System (ABS) available as an option, particularly on later 325is models.

Passive Features

Seatbelts:

Three-point inertia-reel seatbelts front and rear.

Rollover Protection:

Reinforced A-pillars and windshield frame. Convertible models feature enhanced rollover protection.

💡 Technology Features

Infotainment

Audio System:

Factory AM/FM cassette player, often with premium sound system option (e.g., Bavaria C II).

Driver Assistance

Cruise Control:

Available as an option.

Connectivity

Features:

Basic for its era, focusing on driver feedback and mechanical connection rather than electronic wizardry.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically 5,000-7,500 miles or 6-12 months, depending on driving conditions. Refer to manual for precise recommendations.

Major Service Intervals:

Timing belt replacement every 30,000-50,000 miles is critical for the M20 engine. Spark plugs, air filter, fuel filter servicing as per manual.

Fluid Specifications

Engine Oil:

API SG or higher, SAE 15W-40 or 10W-40 recommended (check manual for specific viscosity and BMW approval if available).

Coolant:

50/50 mix of BMW coolant or equivalent ethylene glycol-based antifreeze and distilled water.

Transmission Fluid Manual:

API GL-4 75W-90 or 80W-90 gear oil.

Transmission Fluid Automatic:

Dexron III ATF (or equivalent).

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Known Issues

Engine Management:

MAF sensor issues, idle control valve problems, fuel injector leaks, coolant temperature sensor failure.

Cooling System:

Plastic coolant expansion tank brittle and prone to cracking, water pump failures, thermostat issues.

Suspension Steering:

Worn control arm bushings (especially front), tie rod ends, rear subframe mounting points can become stressed and crack.

Rust:

Common rust areas include wheel wells, rocker panels, rear valence, trunk floor, and battery tray.

Electrical:

Corroded wiring connectors, dashboard illumination issues, intermittent power to accessories.

📚 Vehicle History

Brand Heritage

Bmw Legacy:

BMW's reputation for sporty, driver-focused vehicles, built upon decades of engineering excellence.

Model Evolution

E30 Introduction:

The E30 generation was introduced in 1982, replacing the E21. It was a significant step forward in design and engineering.

325I Introduction:

The 325i model, featuring the larger M20B25 engine, was introduced in 1985, offering increased performance over the earlier 323i and 325e models.

E30 Facelift:

The 1986 model year falls within the E30's significant facelift period, which included revised bumpers ('large bumpers' or 'late model bumpers') and other styling updates.

Production

Production Period:

The E30 generation was produced from 1982 to 1994, with the 325i/is variants primarily produced from 1985 to 1992.

Manufacturing Location:

Germany (primarily Munich and Dingolfing).

🏆 Awards & Recognition

Recognitions

E30 Legacy:

Consistently praised by automotive journalists and enthusiasts for its driving dynamics and handling, often cited as one of the best-handling BMWs of all time.

Motorsport Heritage:

The E30 platform was highly successful in various motorsport disciplines, including touring car racing (DTM).