BMW 318i, 325, 325e, 325es, 325i, 325is, 325i Convertible 1984–1990 Service Manual (P/N B390)
BMW Models Covered & Key Technical Specifications
Models: 318i, 325, 325e, 325es, 325i, 325is, 325i Convertible
Sub-models / Variants: 318iA, 325iA, 325isA, 325eA, 325eSA, 325A, 325iA Convertible, M3, 325ix, 325ixA, 325ix 4-door, 325ixA 4-door
Model Years: 1984–1990
Serial Numbers: Sequential production number for specific vehicle
Technical Data:
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Engine displacement: 1.8 liter (4-cylinder), 2.5 liter (6-cylinder), 2.7 liter (6-cylinder)
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Engine types: M10 (4-cylinder), M42 (4-cylinder), M20 (6-cylinder), S14 (4-cylinder)
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Fuel systems: L-Jetronic, Motronic, Motronic 1.1
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Spark plug torque: 20–30 Nm (15–22 ft. lb.)
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Wheel bolt torque: 110 Nm (81 ft. lb.)
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Transmission oil drain torque: 40–60 Nm (29–43 ft. lb.)
BMW Manual Features & Content Preview
Stop hunting through forums for unverified E30 specs. This 554-page factory-authorized Bentley manual is the definitive shop reference for the 1984–1990 BMW 3 Series. Whether you need to diagnose a hard start or verify crank clearances, this guide delivers the exact tolerances, wiring diagrams, and diagnostic thresholds you need on the bench right now.
- Model Coverage: 1984–1990 BMW 3 Series (318i, 325, 325e, 325es, 325i, and 325i Convertible) across 4-cylinder and 6-cylinder engines.
- Publisher: Original Bentley Publishers release (Part No. B390).
- Extensive Detail: 16 distinct chapters covering everything from the BMW Service Indicator System to deep engine mechanical work.
Manual Content and Workshop Utility
This manual skips the generic filler and gets straight to the heavy lifting. Expect detailed, technical breakdowns of Bosch L-Jetronic and Motronic fuel injection systems, mapping out exactly how air flow meters, oxygen sensors, and electronic control units integrate to optimize performance.
Beyond routine fluid charts, the guide provides massive diagnostic value. You get full visual documentation for suspension teardowns, final drive servicing, and transmission maintenance. If you are tracking down an electrical issue, the manual includes pin-out values, wiring harness connector diagrams, and baseline diagnostic thresholds for sensors and injectors.
Specifications and Reference Data
Forget guessing. The reference tables provide precise torque specifications (listed in both Nm and ft-lb) for vital fasteners like cylinder head bolts and spark plugs. For internal engine reconditioning, you will find exact compression ratios, piston skirt measurements, valve clearances, and crankshaft tolerances.
Working on vintage German machinery requires precision and adherence to strict safety protocols. Always verify these reference parameters against the specific conditions of your project, use proper shop equipment, and ensure you possess the necessary mechanical background before tackling high-pressure fuel systems or heavy chassis components.
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