BMW 7 Series (E32) Service Manual: 1988-1994

Models and Engines Covered

This manual provides detailed information for the following BMW 7 Series (E32) models and their respective engines:

• 735i / 735iL: M30 - 3.5 liter engine
• 740i / 740iL: M60 - 4.0 liter engine (OBD II)
• 750iL: M70 - 5.0 liter engine

Transmissions Covered

The manual includes procedures for removal, installation, and external service for the following transmissions:

• Automatic Transmissions:
  • ZF 4 HP 22 EH (M30 engine)
  • ZF 4 HP 24 EH (M70 engine)
  • ZF A5S 560Z (M60 engine)
• Manual Transmissions:
  • Getrag 260/6 (M30 engine)

Key Features and Technical Highlights

This service manual provides extensive coverage of various vehicle systems and procedures:

• Maintenance Procedures: Detailed instructions for routine maintenance, from brake fluid changes to resetting the Service Indicator.
• Engine Service and Repair: Comprehensive guidance on engine service, repair, and reconditioning, including valve clearance adjustment for 6-cylinder (M30) engines and camshaft timing chain setup and adjustment for V8 (M60) and V12 (M70) engines.
• Driveability Problems: Information for diagnosing and resolving specific driveability issues for DME 1.2 (early and late), DME 1.3, DME 1.7, and DME 3.3 engine management systems, On-Board Diagnostics (OBD), and Electronic Throttle Control (EML).
• Suspension and Brake Systems: Maintenance, troubleshooting, adjustment, and repair procedures for suspension and brake systems, including ABS, traction control (ASC/ASC+T), self-leveling suspension (LAD), and electronic damping control (EDC III).
• Automatic Heating and Air Conditioning (IHKA): Repair instructions, including A/C component replacement.
• Body Adjustments and Repairs: Guidance on body-related adjustments and repairs.
• Wiring Schematics: Complete wiring schematics for all circuits, covering power distribution, ground circuits, and an expanded electrical component location section.
• Factory Specifications: Comprehensive BMW factory tolerances, wear limits, adjustments, and tightening torques.

Understanding Your Manual (Setup)

This manual is organized into chapters and sections, each dedicated to a specific system or component of the BMW 7 Series (E32). To effectively use this manual:

1. Identify Your Model: Confirm your specific BMW 7 Series model (e.g., 735i, 740iL, 750iL) and engine type (M30, M60, M70) to ensure you are referencing the correct procedures and specifications.
2. Review Safety Information: Always read and understand all safety warnings and precautions before beginning any work on your vehicle.
3. Locate Relevant Sections: Use the detailed index (if available in the physical book) or browse through the chapters to find the specific repair or maintenance task you need to perform.
4. Understand Terminology: Familiarize yourself with the technical terms and abbreviations used throughout the manual.

Performing Service Procedures (Operating)

Each procedure in this manual is designed to be followed step-by-step. Pay close attention to details, torque specifications, and any special tool requirements.

• Step-by-Step Instructions: Follow the numbered or bulleted steps precisely. Do not skip steps unless explicitly instructed.
• Illustrations and Diagrams: Refer to accompanying illustrations, diagrams, and wiring schematics to aid in understanding and execution.
• Torque Specifications: Always use a torque wrench to tighten fasteners to the specified values to prevent damage or failure.
• Special Tools: If a special tool is required, ensure you have it or an appropriate alternative before starting the procedure.

Figure 2: Example illustration from the manual, demonstrating a detailed engine repair procedure.

Maintenance

Regular maintenance is crucial for the longevity and performance of your BMW 7 Series (E32). This manual covers all routine maintenance tasks.

Routine Maintenance Examples:

• Brake fluid changes
• Resetting the Service Indicator
• Checking brake pad thickness (refer to section 020 Maintenance)
• Oil and filter changes
• Fluid level checks and top-ups
• Inspection of belts, hoses, and other wear items

For detailed descriptions of engine repair procedures, including timing chain setup and adjustment, refer to section 117 Camshaft Timing Chain.

Troubleshooting

The manual provides guidance for diagnosing and resolving common issues across various systems.

Common Troubleshooting Areas:

• Engine Driveability: Information for specific problems related to DME 1.2, 1.3, 1.7, and 3.3 engine management systems, On-Board Diagnostics (OBD), and Electronic Throttle Control (EML).
• Suspension and Brakes: Troubleshooting guides for ABS, traction control (ASC/ASC+T), self-leveling suspension (LAD), and electronic damping control (EDC III).
• Electrical Systems: Use the provided wiring schematics and electrical component location section (refer to section 610 Electrical Component Locations) to diagnose electrical faults.
• Heating and Air Conditioning: Troubleshooting for IHKA system issues.

Specifications

This manual includes comprehensive BMW factory tolerances, wear limits, adjustments, and tightening torques. Always refer to these specifications when performing repairs or maintenance.

For specific vehicle component specifications (e.g., engine torque values, fluid capacities, electrical resistances), refer to the relevant sections within the manual.

Warranty Information

This instruction manual is a reference publication. Information regarding any warranty for the BMW 7 Series (E32) vehicle itself should be obtained from an authorized BMW dealership or the original vehicle owner's manual. This service manual does not provide warranty coverage for the vehicle or its components.

Support

For inquiries regarding this Bentley Manual, you may contact the publisher:

Please note that Bentley Publishers provides technical manuals and does not offer direct vehicle repair support or consultation.