BMW 3 series e21 Service Repair Manual

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🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E21 Generation: 1st Generation Production Years: 1975-1983 👋 Introduction Market Position Target Audience: Owners and mechanics seeking detailed, authoritative...

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Taper: Car

Distributeur:

UGS: 480397

Mots clés: 3 Series BMW Car Cars e21

Variantes de produits

Description

🏷️ Basic Information

Identification

Make:

Model:

3 Series

Chassis Code:

Generation:

1st Generation

Production Years:

1975-1983

👋 Introduction

Market Position

Target Audience:

Owners and mechanics seeking detailed, authoritative information for maintaining and repairing BMW E21 models.

Competitive Analysis

Value Proposition:

Offers a comprehensive and instantly accessible alternative to expensive, hard-to-find dealership or older printed manuals.

Key Features

Instant Access:

Digital format allows for immediate download and use, eliminating shipping delays.

Completeness:

Covers a vast array of mechanical, electrical, and body systems, ensuring all aspects of the vehicle are addressed.

Support:

Customer support offered for any questions, with a satisfaction guarantee.

📋 Manual Details

Coverage

Manual Title:

BMW 3 Series E21 Service Repair Manual

Manual Type:

Service and Repair Manual

Language:

English

Format:

Digital Download (PDF)

Page Count:

Comprehensive (Exact page count not specified, but described as 'complete')

📖 Manual Coverage

Systems Covered

Engine Mechanicals:

Detailed procedures for engine disassembly, inspection, repair, and reassembly.

Engine Control Systems:

Diagnosis and repair of fuel injection and ignition control systems.

Cooling System:

Maintenance, troubleshooting, and repair of the radiator, water pump, thermostat, and coolant.

Exhaust System:

Inspection, repair, and replacement of exhaust manifolds, pipes, and mufflers.

Fuel System:

Service for fuel pumps, carburetors (where applicable), fuel lines, and filters.

Transmission Manual:

Repair and overhaul procedures for manual gearboxes.

Transmission Automatic:

Troubleshooting and repair of automatic transmission systems.

Clutch System:

Service and replacement of clutch components.

Driveline Rear Axle:

Diagnosis and repair of the rear axle, differential, and drive shafts.

Suspension Front:

Repair and adjustment of front suspension components (struts, control arms, bushings).

Suspension Rear:

Service and repair of rear suspension systems.

Road Wheels Tires:

Information on wheel balancing, tire rotation, and specifications.

Steering System:

Repair and adjustment of steering racks and components.

Power Steering:

Troubleshooting and repair of the power steering system (where equipped).

Brakes Front:

Service for front brake discs, calipers, pads, and lines.

Brakes Rear:

Service for rear brake drums/discs, shoes/pads, and lines.

Restraint System Seatbelts:

Inspection and repair of seat belt mechanisms.

Restraint System Srs:

Information on Supplemental Restraint System (SRS) components and precautions (if applicable to the E21 generation).

Body Exterior:

Repair and maintenance of body panels, trim, bumpers, and doors.

Body Interior:

Service for interior trim, upholstery, dashboard, and controls.

Locking Systems:

Repair and adjustment of door locks, latches, and key mechanisms.

Windows Mechanisms:

Service for manual and power windows, regulators, and seals.

Roof Systems:

Repair of standard roofs and sunroofs (if equipped).

Air Conditioning:

Maintenance and repair of the A/C system, including refrigerant handling (with appropriate warnings).

Electrical Wiring Diagrams:

Detailed wiring schematics for all vehicle electrical systems.

Starting Charging System:

Diagnosis and repair of the battery, alternator, and starter motor.

Lighting System:

Service for headlights, taillights, interior lights, and associated circuits.

Instrument Cluster:

Troubleshooting and repair of gauges, warning lights, and indicators.

Driver Information Systems:

Diagnosis of message systems and on-board computer functions (if equipped).

Wipers Washers:

Service for the windshield wiper and washer systems.

Horn System:

Troubleshooting and repair of the horn circuit.

Audio Video Systems:

Basic troubleshooting for factory or aftermarket audio systems.

Power Systems Distribution:

Understanding and troubleshooting the vehicle's electrical power distribution.

Procedures Included

Routine Maintenance:

Step-by-step instructions for oil changes, filter replacements, fluid checks, and lubrication.

Tune Ups:

Guidance on ignition timing, carburetor adjustment, and spark plug replacement.

Troubleshooting Diagnostics:

Systematic approaches to identifying and resolving common and complex vehicle problems.

Component Replacement:

Detailed instructions for replacing virtually all major and minor components.

Rebuild Procedures:

Comprehensive instructions for overhauling engines, transmissions, and other major assemblies.

Specifications Data:

Torque specifications, clearances, fluid capacities, and other critical data.

Wiring Diagram Interpretation:

Guidance on understanding and using complex automotive wiring schematics.

Technical Depth

Depth Of Coverage:

Expert-level diagnostic and repair procedures, suitable for both DIY enthusiasts and professional mechanics.

📊 Manual Specifications

File Attributes

File Format Type:

Portable Document Format (PDF)

Searchability:

Likely searchable text within the PDF for easy navigation.

Printability:

Designed for instant download and printing, enabling physical access to information.

Quality:

Implied high-quality scans or digital creation suitable for detailed technical information.

⚙️ Engine Specifications

Primary Engine Variants

M10 (4-Cylinder):

Available in displacements such as 1.8L (M10B18) and 2.0L (M10B20), later evolved to 2.3L (M10B23) for the 323i.

M20 (6-Cylinder):

Introduced later in the E21's life, notably the 2.3L (M20B23) found in the 323i.

Performance General

Horsepower Range:

Varies significantly by engine and market, typically from ~90 hp to ~140 hp for 4-cylinder models, and ~139 hp for the 323i.

Torque Range:

Corresponds to horsepower figures, with 6-cylinder models offering more torque.

Fuel System

Carbureted:

Early models and lower trims utilized Solex or Zenith carburetors.

Fuel Injection:

Later models, especially the 323i, featured Bosch L-Jetronic or K-Jetronic fuel injection.

🔧 Transmission

Standard Transmission

Manual Gearbox:

Typically a 4-speed or 5-speed Getrag manual transmission was standard.

Optional Transmission

Automatic Gearbox:

A ZF 3-speed automatic transmission was an optional offering on most models.

Features

Clutch Type:

Single dry plate clutch.

📐 Dimensions

Exterior General

Body Styles:

Primarily offered as a 2-door sedan, with a limited production 4-door sedan also available.

Wheelbase:

Approximately 2,563 mm (100.9 in).

Length:

Approximately 4,360 mm (171.7 in).

Width:

Approximately 1,610 mm (63.4 in).

Height:

Approximately 1,380 mm (54.3 in).

Weights

Curb Weight:

Generally ranged from 1,100 kg to 1,250 kg depending on engine and equipment.

🛡️ Safety Features

Ratings General

Era Specific Safety:

Safety features reflect the standards of the late 1970s and early 1980s. Advanced crash testing and electronic safety systems were not prevalent.

Active Features

Brakes:

Front disc brakes, rear drum brakes were standard. Some later models or options included rear disc brakes.

Steering:

Recirculating ball steering, with optional power steering available on some models.

Passive Features

Seatbelts:

Standard lap and shoulder belts for front occupants, lap belts for rear occupants.

Body Structure:

Designed with crumple zones for its time, though less sophisticated than modern vehicles.

💡 Technology Features

Infotainment

Audio System:

Typically featured basic AM/FM radios with optional cassette players. Aftermarket head units and speakers are common upgrades.

Driver Assistance

Anti-lock Braking System (ABS) was not a standard feature on early E21 models, and only available as an option on later high-spec models.

Connectivity

Connectivity Features:

No advanced connectivity features like Bluetooth or USB ports were available from the factory.

🔧 Maintenance

Service Intervals

Oil Change:

Typically every 5,000 - 7,500 miles (8,000 - 12,000 km) or annually, depending on driving conditions.

Filter Replacement:

Oil filter with every oil change; air filter and fuel filter every 15,000 - 30,000 miles (24,000 - 48,000 km).

Spark Plugs:

Recommended replacement every 20,000 - 30,000 miles (32,000 - 48,000 km).

Fluid Specifications

Engine Oil:

API SG or SF rated multi-viscosity oil, such as 10W-40 or 20W-50 depending on climate. Consult specific manual for exact viscosity.

Coolant:

50/50 mixture of ethylene glycol antifreeze and distilled water.

Transmission Fluid Manual:

GL-4 gear oil, typically 75W-90 or 80W-90.

Transmission Fluid Automatic:

Dexron III (or equivalent) ATF.

Brake Fluid:

DOT 3 or DOT 4 brake fluid.

Known Issues

Rust And Corrosion:

Common for vehicles of this age, particularly in areas exposed to road salt. Areas to inspect: wheel arches, rocker panels, rear valence, and floor pans.

Fuel Lines:

Age-related degradation of rubber fuel lines can lead to leaks.

Cooling System Leaks:

Hoses, radiators, and water pumps can develop leaks over time.

Electrical Connections:

Corrosion or loose connections in wiring harnesses, especially grounds, can cause intermittent electrical issues.

Carburetor Issues:

Carburetors can become gummed up or require adjustment due to age and fuel quality.

📚 Vehicle History

Brand Heritage

Bmw Philosophy:

The E21 continued BMW's legacy of building sporty, driver-focused sedans with a reputation for engineering excellence and performance.

Model Evolution

Predecessor:

Succeeded the iconic BMW 2002 series.

Successor:

Succeeded by the E30 3 Series.

Design Influence:

Featured BMW's new design language, with the driver-oriented dashboard becoming a hallmark.

Production

Manufacturing Locations:

Primarily manufactured in Germany.

Sales Volume:

One of BMW's most successful models of its era, selling over 1.3 million units globally.

🏆 Awards & Recognition

Recognitions

Automotive Press Reviews:

Consistently praised by automotive press for its driving dynamics, handling, and build quality for its era, establishing the benchmark for the 3 Series line.