Target Audience:
Professional mechanical technicians and knowledgeable DIY car owners of Audi B3 90 models.
Value Proposition:
Provides comprehensive, dealer-level information to enable accurate diagnostics, maintenance, and repairs, potentially saving significant costs compared to professional servicing.
Emphasis:
Special aspects of the product, proprietary component instructions, clear warnings and cautions.
Benefit:
Enables owners/technicians to build a reputation for quality service by following precise procedures.
General Coverage:
Comprehensive repair and overhaul of the Audi B3 90
Specific Areas:
Engine, Transmission, Fuel System, Ignition, Lubrication, Exhaust, Electrical System, Bodywork, Chassis, Suspension, Brakes, HVAC, Interior
Estimated Page Count:
Extensive (Exact count not specified, but implied to be comprehensive)
Type:
Workshop Service Repair Manual
Clarity And Precision:
Written in English with clear terminology, assuming a baseline understanding of automotive practices, and uses symbols (WARNING, CAUTION, NOTE) for critical information.
Engine Systems:
Engine Mechanical, Engine Management, Fuel Injection, Ignition System, Cooling System, Lubrication System, Emission Control
Powertrain Systems:
Manual Transmission, Automatic Transmission, Drivetrain Components (Axles, Driveshafts)
Chassis Systems:
Suspension (Front & Rear), Steering System, Brake System (Hydraulic, ABS if applicable)
Electrical Systems:
Wiring Diagrams, Lighting, Instruments, HVAC Controls, Power Accessories, Starter, Charging System
Body Systems:
Body Construction, Exterior Trim, Doors, Hood, Trunk, Interior Trim, Glass
Maintenance:
Routine Maintenance, Service Intervals, Fluid Changes, Filter Replacements, Inspections
Repair Overhaul:
Component Removal and Installation, Assembly and Disassembly, Major Component Rebuilds (Engine, Transmission)
Diagnostics:
Troubleshooting Guides, Diagnostic Procedures, Symptom-Based Diagnosis
Technical Adjustments:
Ignition Timing, Carburetor/Fuel Injection Adjustments, Wheel Alignment
Depth:
Detailed, suitable for professional technicians and advanced DIY enthusiasts. Covers procedures from routine maintenance to complete engine and transmission overhauls.
Special Tools:
The manual is noted to reference special Audi tools by their part numbers, essential for specific adjustments and repairs, highlighting its professional-level detail.
Format Details:
PDF (Portable Document Format)
Searchability:
Likely text-searchable if professionally produced PDF, enabling quick information retrieval.
Delivery Method:
Electronic Delivery via Email (Fast and Free)
Physical Medium:
Not Applicable (Digital Product)
Engine Options:
Likely includes 2.0L (10 valves), 2.3L (10 valves) inline-5 cylinder engines. Specific engine codes (e.g., NG, NF, KV) are expected to be detailed.
Power Output:
Details on horsepower and torque figures for each engine variant will be present. For example, the 2.3L KV engine typically produced around 130-136 hp.
Torque Output:
Specific torque figures for the 2.0L and 2.3L inline-5 engines will be provided, crucial for performance tuning and diagnostics.
Injection Type:
Bosch K-Jetronic (CIS) and later CIS-E (CIS-Jetronic Electronic) fuel injection systems are expected for most variants, with detailed coverage.
Fuel Type:
Unleaded gasoline. Specific octane recommendations will be included.
Oil Type:
Viscosity grades like 10W-40 or 5W-40 are common for this era, with specific API/ACEA ratings detailed in the manual.
Oil Capacity:
Detailed oil capacities for the engine, including filter change, will be provided for correct servicing.
Coolant Type:
Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. Specific Audi approvals might be mentioned.
Ignition Timing:
Specific degrees Before Top Dead Center (BTDC) at idle speed, often adjustable via distributor or ignition module. Points and condenser or electronic ignition details will be covered.
Engine Control Unit:
Details on engine control unit (ECU) functions and troubleshooting for models equipped with electronic fuel injection and ignition control (CIS-E).
Manual Transmission:
Likely a 5-speed manual transmission (e.g., CLK, GQP) as standard on many models.
Automatic Transmission:
Optional 3-speed or 4-speed automatic transmission (e.g., ZF 4HP22) was available on some models.
Drivetrain:
Front-wheel drive (FWD) or optional permanent Quattro all-wheel drive (AWD) system coverage is expected.
Quattro System:
Comprehensive coverage for the legendary Audi Quattro permanent all-wheel-drive system, including differential maintenance and torque split.
Manual Transmission Fluid:
GL-4 gear oil, likely with specific SAE viscosity grades (e.g., 75W-90 or 80W-90).
Automatic Transmission Fluid:
Dexron-II or equivalent ATF fluid specification for automatic transmissions.
Crash Test Data:
Limited official crash test data for this era from independent agencies might be available, but the manual will detail safety systems designed into the vehicle.
Braking System:
Front disc brakes, rear drum brakes or disc brakes depending on model/trim. ABS (Anti-lock Braking System) was an option on some models.
Restraint Systems:
Seat belts with pretensioners, potentially driver airbag on later models. Detailed information on airbag system servicing if equipped.
Audio System:
Factory-installed radio/cassette player, often with up to 6 speakers. Options for premium sound systems.
ABS:
Anti-lock Braking System (ABS) was available as an option on many models, significantly enhancing braking control.
Original Features:
Focus on mechanical and electrical systems rather than modern digital connectivity. Central locking and power windows were common features.
Oil Change Interval:
Typically every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions and oil type used.
Timing Belt Replacement:
Crucial interval, typically around 60,000 miles (96,000 km) or 4-5 years. Failure can cause severe engine damage.
Spark Plug Replacement:
Varies by spark plug type (conventional, platinum, iridium). Expect intervals from 30,000 to 60,000 miles.
Brake Fluid:
DOT 3 or DOT 4 brake fluid. Regular flushing and replacement are recommended every 2 years.
Power Steering Fluid:
Hydraulic fluid meeting specified Audi standards, likely CHF 11S or an equivalent.
Coolant:
G11 (blue/green) or G12 (pink/red) antifreeze, mixed with distilled water. Proper mixture is critical for freeze and corrosion protection.
Electrical Gremlins:
Common for older European cars; aging wiring harnesses, failing relays, and corroded ground points can cause intermittent issues.
Fuel Delivery Issues:
Degradation of K-Jetronic system components (e.g., fuel distributor, airflow meter, injectors), cold start valve issues.
Suspension Wear:
Worn control arm bushings, ball joints, and strut mounts are common maintenance items.
Exhaust System:
Corrosion and leaks in the exhaust manifold, catalytic converter, and muffler.
Cooling System:
Aging radiators, hoses, and water pumps can lead to overheating.
Audi Heritage:
Audi's reputation for engineering quality, quattro all-wheel drive technology, and sophisticated design.
B3 Generation:
The B3 generation represented a significant styling and engineering update for Audi, featuring improved aerodynamics and safety compared to its predecessor.
Audi 90 Positioning:
The Audi 90 served as a slightly more upscale and performance-oriented model compared to the Audi 80, often featuring the larger inline-5 engines and more premium appointments.
Production Period:
1986-1991
Manufacturing Location:
Ingolstadt, Germany
