1984-1990 BMW 3 Series Service Manual (318i, 325, 325e, 325es, 325i, 325is, 325i Convertible)

This comprehensive BMW 3 Series service manual covers 1984-1990 models, including the 318i, 325, 325e, 325es, 325i, 325is, and 325i Convertible. Publication B390.

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Document Details

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Document Number / Seller:
29013 / David White
File Size:
159.16 MB
File Type:
PDF
Language:
English
Printable:
Yes
Estimated Download Time:
3.26 Minutes
Delivery Format:
Digital (PDF) - Instant Access
Category:
Car
Brand:
BMW
Reviewed and Approved:
Oct 6, 2025
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Models Covered & Key Technical Specifications

BMW 3 Series Service Manual and Technical Guide (1984-1990)

318i, 325, 325e, 325es, 325i, 325is, and 325i Convertible | Bentley Publishers File

  • Technical Data: Includes detailed engine specifications for 4-cylinder and 6-cylinder engines, covering bore, stroke, displacement, compression ratio, horsepower, and torque figures.
  • Ignition System: Covers Transistorized Coil Ignition (TCI-i) and Motronic (DME) systems, including testing, maintenance, and troubleshooting of distributor, coil, spark plugs, and related components.
  • Fuel System: Details L-Jetronic and Motronic fuel injection systems, fuel supply, pressure regulation, air flow measurement, idle speed control, and injector testing.
  • Lubrication and Maintenance: Outlines routine maintenance schedules based on BMW's Service Indicator System, including fluid specifications, oil changes, tune-ups, and component checks.
  • Engine Mechanical: Provides procedures for engine disassembly, assembly, and reconditioning, including piston, ring, cylinder, crankshaft, valve, and cylinder head specifications and measurements.
  • Troubleshooting: Offers guidance on diagnosing and resolving common engine problems, from starting issues and driveability symptoms to noises and fluid leaks.

Professional Workshop Service Manual & Technical Specifications

Comprehensive Configuration Workshop Manual: BMW 3 Series Service & Repair Reference Electrical-Reference (1984-1990)

Asset-ID: B390 // Series-Validation: E30 Car / Engine Logic // Asset-ID: Bentley Publishers TOP Performance-Element Operational-Logic Context
Engine Components Detailed descriptions of 4-cylinder and 6-cylinder engines, including crankshaft, pistons, cylinder head, and valve train. Each component's function and assembly is explained.
Ignition System Covers TCI-i and Motronic systems, including timing, coils, distributors, and spark plugs. Troubleshooting steps for starting and running issues are provided.
Fuel System Explains L-Jetronic and Motronic fuel injection, fuel delivery, and pressure regulation. Covers air flow sensors, idle control, and injector testing.
Lubrication and Maintenance Routine maintenance tasks and schedules specified by BMW. Includes fluid and lubricant specifications and engine oil change procedures.
Troubleshooting Logical approach to diagnosing engine and driveability problems. Focuses on common issues like noise, fluid leaks, and poor performance.
General Description Overview of the car's systems and how they function. Includes VIN decoding and basic safety information.

Comprehensively requiring the documentation of all engine systems, procedures, and maintenance schedules. The manual provides a structural breakdown of the vehicle's systems, from general descriptions to detailed troubleshooting. It includes an introduction to the manual's structure, safety advice, and descriptions of necessary tools. The document details engine management systems, fuel delivery, ignition timing, and various engine components. It also addresses lubrication, maintenance, and cleaning procedures, offering comprehensive coverage for the specified BMW 3 Series models. The manual documents torque specifications for component alignment retention to ensure proper assembly and function.

FAQ

Determine the **specific** torque specifications for critical engine components. keyboard_arrow_down

Torque specifications are provided for various components, such as cylinder head bolts, crankshaft sprocket bolts, and intake manifold bolts, to ensure correct component alignment retention and proper engine operation. For example, cylinder head bolts are tightened in stages, with specific torque values and angles provided in the technical data sections.

What **designated** safety precautions should be followed when working with the fuel system? keyboard_arrow_down

When working with the fuel system, it is critical to observe several safety precautions. Fuel is highly flammable and can be under pressure. Always ensure the ignition is off, avoid any potential spark sources, do not smoke, and keep an approved fire extinguisher readily available. Loosen fuel lines slowly to dissipate residual pressure and avoid spraying fuel.

Check the **critical** lubrication requirements for the engine and its components. keyboard_arrow_down

Proper lubrication is vital for engine longevity and performance. The manual details engine oil specifications, manual transmission gear oil, and final drive gear oil requirements. Regular oil changes, as guided by the Service Indicator System, are essential. Specifications for lubricants, including SAE viscosity grades and API service ratings, are provided to ensure optimal protection and performance.

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Reviews (3)

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This guide covers everything you need for my 1987 BMW 3 Series. The support I received via email was prompt and very helpful. Overall a fantastic purchase!
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New
The step-by-step instructions are easy to follow. I was able to tackle my maintenance tasks without any issues. Plus, the download process was seamless!
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This manual is a lifesaver! The diagrams are incredibly helpful and the troubleshooting tips made my repairs much easier. Highly recommend for any BMW 3 Series enthusiast!