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Audi 90 1988-1992 Service Repair Manual

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Basic Information Identification Make: Audi Model: 90 Model Code: Type 85 / Type 8A (B3 chassis) Years Covered: 1988-1992 Market Segment: Compact Executive Sedan/Coupe Introduction Market Position Segment: Premium compact...
Taper: Cars
Distributeur:
UGS: 471690
Mots clés: 90 Audi
Audi 90 1988-1992 Service Repair Manual
Basic Information
Identification
Make: Audi
Model: 90
Model Code: Type 85 / Type 8A (B3 chassis)
Years Covered: 1988-1992
Market Segment: Compact Executive Sedan/Coupe
Introduction
Market Position
Segment: Premium compact executive segment, competing with BMW 3 Series, Mercedes-Benz 190E.
Competitive Analysis
Key Competitors: BMW E30 3 Series, Mercedes-Benz W201 190E, Acura Legend, Lexus ES250.
Key Features
Design Philosophy: German engineering, sophisticated styling, front-wheel drive (standard) and quattro all-wheel drive options, inline-five engines.
Unique Selling Points
Powertrain: Renowned Audi inline-five cylinder engines known for smooth power delivery and unique sound.
Manual Details
Coverage Areas
Primary Coverage: Maintenance and Repair Procedures
Secondary Coverage: Specifications, Technical Features, Troubleshooting, Electrical Systems, Fuel Systems, Powertrain, Drivetrain, Suspension, Maintenance, Index, Appendix
Page Count
Estimated Page Count: Varies based on specific model year and engine; typically 500+ pages for comprehensive factory manuals.
Manual Type
Type: Service Repair Factory Manual
Language
Language: English
Format
Format: PDF
Manual Coverage
Systems Covered
Engine: Engine mechanical, engine management, cooling system, lubrication system, emission control system
Fuel System: Fuel injection (CIS-E/KE-Jetronic), fuel pump, fuel filter, fuel lines, fuel tank
Electrical System: Wiring diagrams, battery, charging system, ignition system, lighting, instruments, accessories, starter motor, ECU diagnostics
Transmission: Manual and Automatic transmission repair, clutch, driveline components (CV joints, driveshafts)
Suspension Steering: Front and rear suspension, steering gear, power steering system, wheel alignment
Brakes: Hydraulic system, disc brakes (front and rear), anti-lock braking system (ABS) if equipped, parking brake
Body Chassis: Body panel repair, interior trim, doors, windows, HVAC (Heating, Ventilation, and Air Conditioning), chassis components
Procedures Included
Maintenance: Scheduled maintenance (oil changes, filter replacements, tune-ups), fluid checks and replacements, belt inspections and replacements
Troubleshooting: Diagnostic procedures for common problems, fault code interpretation (if applicable), electrical system troubleshooting
Repair Rebuild: Detailed disassembly, inspection, repair, and reassembly procedures for major components and systems
Technical Adjustments: Valve adjustments, idle speed settings, ignition timing adjustments
Technical Depth
Depth: Comprehensive, covering basic maintenance to major component overhauls and advanced diagnostics
Manual Specifications
File Format
Readability: High clarity, zoomable sections for detailed views
Searchability: Likely searchable text within the PDF for quick information retrieval
Print Quality
Digital Quality: Electronic (PDF), allowing for clear digital viewing
Binding Type
Format Type: Digital Download (PDF)
Paper Type
Physical Equivalent Description: Digital equivalent of a factory-issued bound manual
Engine Specifications
Primary Engine
Engine Options: 2.3L (2309cc) I5 SOHC (5-cylinder, single overhead camshaft)
Engine Code: NG (2.3L)
Performance
Horsepower Rating: Approximately 130-136 hp (depending on market and specific tune)
Torque Rating: Approximately 140-145 lb-ft (depending on market and specific tune)
Fuel System
Fuel Injection: Bosch CIS-E (Continuous Injection System - Electronic) or KE-Jetronic
Technical Details
Bore X Stroke: 82.5 mm x 90.0 mm
Compression Ratio: 10.0:1
Firing Order: 1-2-4-5-3
Engine Placement: Transverse
Engine Mounts: Hydraulic mounts for vibration isolation
Transmission
Standard
Transmission Type: 5-speed Manual Transaxle (FWD)
Optional
Transmission Type: ZF 4-speed Automatic Transaxle (FWD or AWD)
Features
Drivetrain Options: Front-Wheel Drive (FWD) and Audi quattro All-Wheel Drive (AWD)
Clutch Type: Hydraulically actuated single dry-plate clutch (Manual)
Dimensions
Exterior
Wheelbase: Approximately 2611 mm (102.8 inches)
Length: Approximately 4335 mm (170.7 inches)
Width: Approximately 1700 mm (66.9 inches)
Height: Approximately 1390 mm (54.7 inches)
Weights
Curb Weight: Approximately 1280-1400 kg (2820-3085 lbs) depending on configuration
Gross Vehicle Weight Rating: Approx. 1700 kg (3750 lbs)
Cargo
Trunk Volume: Approx. 0.42 m³ (14.8 cubic feet)
Wheels Tires
Standard Wheel Size: 14-inch or 15-inch alloy wheels
Bolt Pattern: 4x108 mm
Standard Tire Size: 185/60HR14 or 195/60HR15 (varies by trim and year)
Safety Features
Ratings
Crash Test Results: No specific government ratings readily available for this era, but German engineering emphasized safety features for the time.
Active Features
Braking System: Standard front ventilated discs, rear solid discs. Optional Bosch ABS (Anti-lock Braking System).
Steering: Power-assisted rack and pinion steering.
Passive Features
Occupant Protection: Safety cage construction, padded interior, optional driver's side airbag (late models), seat belts (front and rear).
Lighting: Halogen headlights, integrated fog lights (optional/standard on higher trims).
Technology Features
Infotainment
Audio System: Factory AM/FM cassette radio with optional CD player integration.
Driver Assistance
ABS: Optional Bosch Anti-lock Braking System (ABS) was available on some models.
Comfort Features
Climate Control: Manual HVAC system with optional automatic climate control on higher trims.
Windows Mirrors: Power windows and power-adjustable mirrors were common options.
Maintenance
Service Intervals
Oil Change Interval: Typically every 7,500 miles (12,000 km) or 12 months, whichever comes first.
Timing Belt Replacement: Recommended every 60,000 miles (96,000 km) or 5 years due to interference engine design.
Coolant Flush: Every 2-3 years or as per manual recommendation.
Fluid Specifications
Engine Oil: API SG/SH, SAE 5W-30 or 5W-40 (check specific manual for exact grade and viscosity based on temperature).
Coolant: G11 (Blue) or G12 (Pink) antifreeze (ethylene glycol-based) mixed with distilled water (50/50 ratio).
Transmission Fluid Manual: VW G 052 172 A1 (or equivalent GL-4 gear oil)
Transmission Fluid Automatic: ATF Dexron III (or equivalent)
Brake Fluid: DOT 3 or DOT 4
Known Issues
Fuel System: CIS-E/KE-Jetronic issues: cold start problems, rough idle, fuel distributor leaks, worn frequency valves.
Electrical System: Wiring harness degradation (especially in engine bay), failing coolant temperature sensors, intermittent electrical connections.
Engine: Timing belt failure if not replaced at intervals, oil leaks (valve cover gasket, oil pan gasket), vacuum leaks.
Suspension: Worn control arm bushings, ball joints, and tie rod ends leading to play and poor handling.
HVAC: Compressor clutch failure, A/C system leaks, blower motor issues.
Vehicle History
Brand Heritage
Brand Origins: Founded in 1899 in Germany, Audi has a history of innovation in automotive engineering.
Model Evolution
Chassis Platform: Based on the Audi B3 platform, sharing some underpinnings with the Audi 80.
Body Styles: Primarily offered as a 4-door sedan. A 2-door coupe variant was also available.
Production
Production Years: 1988-1992 (for the Audi 90 designation)
Manufacturing Location: Ingolstadt, Germany and other Volkswagen Group facilities.
Awards & Recognition
Recognitions
General Reputation: Audi 90 was well-regarded for its build quality, refinement, and performance for its era.
Design Awards: While specific design awards for the Audi 90 aren't widely cited, the B3 chassis design was considered sleek and modern at the time.
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