BMW 3 Series 325i 1987-1991 Workshop Service Repair Manual

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🏷️ Basic Information Identification Make: BMW Model: 3 Series Sub Model: 325i Model Years: 1987-1991 Codes Chassis Code: E30 👋 Introduction Market Position Positioning: The BMW 3 Series (E30) represented...

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类型: Car

斯库: 447777

标签: 1987 1988 1989 1990 1991 3 Series 325i BMW Car Cars Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

3 Series

Sub Model:

Model Years:

1987-1991

Codes

Chassis Code:

👋 Introduction

Market Position

Positioning:

The BMW 3 Series (E30) represented BMW's entry into the compact executive sedan market, offering a blend of sporty handling, refined engineering, and luxury.

Competitive Analysis

Competitors:

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

Key Features

Driving Dynamics:

Renowned for its balanced chassis, rear-wheel-drive platform, and engaging driving experience.

Design Era:

Classic, understated BMW design language of the era.

Target Audience

Audience:

Enthusiasts, DIY mechanics, and owners seeking to maintain and repair their classic BMWs.

📋 Manual Details

Coverage Areas

Coverage Focus:

Workshop service and repair

Page Count

Page Count:

Manual Type

Manual Type:

Workshop Service Repair Manual

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Full overhaul, diagnosis, tuning, component replacement (M20B25)

Engine Management:

Fuel injection (Motronic), ignition system, sensors, actuators, troubleshooting

Transmission Manual:

Clutch, gearbox overhaul, shift linkage, maintenance

Transmission Automatic:

Service, fluid changes, troubleshooting, component replacement (if applicable to 325i models)

Drivetrain:

Driveshafts, universal joints, differential, axle shafts

Suspension:

Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment specifications

Steering:

Steering rack, power steering system, linkages, troubleshooting

Brakes:

Disc brakes (front and rear), hydraulic system, ABS (if equipped), bleeding, pad and rotor replacement, caliper service

Electrical System:

Battery, charging system, starter, lighting, wipers, horn, accessory circuits

Body And Chassis:

Body panels, doors, hood, trunk, interior trim, glass, seals

Heating Ventilation Air Conditioning:

HVAC system operation, component service, refrigerant handling (R12 typical)

Exhaust System:

Exhaust manifold, catalytic converter (if applicable), mufflers, pipes

Fuel System:

Fuel tank, fuel pump, fuel lines, injectors, fuel pressure regulation

Cooling System:

Radiator, thermostat, water pump, hoses, coolant specifications

Interior Systems:

Seats, seat belts, dashboard, instrumentation

Procedures Included

Maintenance Tasks:

Oil changes, filter replacements, spark plug replacement, fluid level checks, lubrication

Diagnostic Procedures:

Troubleshooting charts, symptom analysis, fault code interpretation (where applicable)

Repair Procedures:

Step-by-step instructions for component removal, installation, and adjustment

Rebuilding Procedures:

Engine and transmission rebuild instructions with specifications

Wiring Diagrams:

Detailed electrical wiring schematics for various systems

Specifications And Tolerances:

Torque values, clearances, measurements for all components

Technical Depth

Depth:

Comprehensive (from basic maintenance to full engine/transmission rebuilds)

Diagnostic Capability:

Advanced diagnostic procedures and troubleshooting guides

Special Tools:

Identification and use of specialized BMW tools required for certain procedures

📊 Manual Specifications

File Format

File Format:

Print Quality

Resolution:

High-resolution, suitable for printing

Searchability:

Likely text-searchable PDF for quick information retrieval

Binding Type

Binding Type:

N/A (Digital PDF format)

Paper Type

Paper Type:

N/A (Digital PDF format)

Completeness

Completeness:

Full workshop manual, covering all major systems and repairs.

⚙️ Engine Specifications

Primary Engine

Engine Code:

M20B25

Configuration:

Inline 6-cylinder, SOHC

Displacement:

2.5 liters (2494 cc)

Performance

Horsepower:

168 hp @ 5800 rpm (approximate, US spec)

Torque:

225 Nm (166 lb-ft) @ 4300 rpm (approximate, US spec)

Fuel System

Fuel Delivery:

Bosch Motronic electronic fuel injection (EFI)

Fuel Type:

Unleaded gasoline (Premium Octane recommended)

Cooling System

Coolant Type:

Ethylene glycol-based coolant, typically a 50/50 mix with distilled water.

Ignition System

Ignition Type:

Electronic ignition with distributor and coil

🔧 Transmission

Standard

Type:

Getrag 260 5-speed manual transmission

Optional

Type:

ZF 4HP-22 4-speed automatic transmission

Features

Clutch Type:

Hydraulically actuated single-plate dry clutch

Fluid Specs

Manual Transmission Fluid:

API GL-4, SAE 75W-90 or 80W-90 (check specific manual for exact spec)

Automatic Transmission Fluid:

Dexron-III or equivalent (check specific manual for exact spec)

📐 Dimensions

Exterior

Body Styles:

2-door sedan, 4-door sedan, convertible, touring (wagon - less common for 325i)

Wheelbase:

Approx. 2565 mm (101 inches)

Length:

Approx. 4330 mm (170.5 inches)

Width:

Approx. 1675 mm (66 inches)

Height:

Approx. 1380 mm (54.3 inches)

Weights

Curb Weight:

Approx. 1300-1400 kg (2866-3086 lbs), varies by body style and options

Gross Vehicle Weight - Consult specific vehicle plate or manual.

Wheel And Tire

Bolt Pattern:

5 x 120 mm

Tire Size Std:

205/55 VR 15 (common original spec)

Wheel Size Std:

15 x 7 inch alloy

🛡️ Safety Features

Ratings

Crash Tests:

Limited formal crash test data available by modern standards. E30 known for robust chassis for its era.

Active Features

Anti-lock Braking System (ABS) was an optional feature on many 325i models.

Passive Features

Seatbelts:

Three-point front seatbelts, lap belts in the rear.

Headrests:

Front and rear headrests (depending on body style/options).

Construction

Body Structure:

Reinforced unibody construction with crumple zones.

💡 Technology Features

Infotainment

Audio System:

Factory-installed cassette radio (often with optional CD changer). Upgradeable to modern head units.

Climate Control:

Manual or optional automatic climate control system.

Driver Assistance

Cruise Control:

Optional cruise control system.

Connectivity

Bluetooth:

Not available from factory; requires aftermarket installation.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically 7,500-10,000 miles (12,000-16,000 km) or annually, whichever comes first (check manual).

Spark Plug Replacement:

Approximately 30,000 miles (48,000 km).

Timing Belt Replacement:

M20 engine uses a timing belt. Replacement interval is crucial, often around 60,000 miles (96,000 km) or 5 years. Failure is catastrophic.

Fluid Specifications

Engine Oil:

API SG/SH or higher, SAE 10W-40 or 15W-40 (check manual for ambient temperature recommendations).

Coolant:

BMW Coolant (Blue) or equivalent ethylene glycol-based antifreeze mixed 50/50 with distilled water.

Brake Fluid:

DOT 3 or DOT 4 (check manual), replaced every 2 years due to hygroscopic nature.

Power Steering Fluid:

Pentosin CHF 11S or equivalent hydraulic fluid (specific to BMW).

Known Issues

Cooling System:

Plastic thermostat housing prone to cracking, radiator end tanks can leak, water pump failure.

Engine Oil Leaks:

Valve cover gasket, oil pan gasket, and front/rear main seals are common leak points due to age.

Fuel Injectors:

Can become clogged over time, affecting performance and idle.

Suspension Bushings:

Control arm bushings, subframe bushings, and trailing arm bushings degrade with age, impacting handling and ride quality.

Electrical Connectors:

Corrosion and degradation of wiring harness connectors can lead to intermittent electrical faults.

ABS Sensors:

ABS wheel speed sensors can fail, leading to ABS warning lights.

📚 Vehicle History

Brand Heritage

Heritage Description:

BMW, established in 1916, is renowned for its 'Ultimate Driving Machine' philosophy, emphasizing performance, engineering, and driver engagement.

Model Evolution

E30 Introduction:

The E30 generation of the 3 Series was introduced in 1982, replacing the E21. The 325i model, featuring the M20 engine, became a hallmark of the E30 lineup.

325I Specifics:

The 325i, with its 2.5L inline-six, offered a significant performance upgrade over earlier 320i and 323i models, becoming a popular choice for enthusiasts.

Facelifts:

The E30 received facelifts, notably in 1987 (often referred to as 'late' E30s), which included revised bumpers, trim, and interior details.

Production

Production Years:

E30 generation produced from 1982 to 1994 (convertible models continued longer).

Manufacturing Locations:

Primarily Germany (Munich), with some assembly in other BMW plants globally.

🏆 Awards & Recognition

Recognitions

Automotive Press:

Consistently praised by automotive journalists for its handling, build quality, and driver focus, often cited as a benchmark in its class.

Collector Status:

The E30 325i is highly regarded by enthusiasts and is considered a modern classic, appreciating in value due to its driving dynamics and reliability when properly maintained.