🏷️ Basic Information Identification Make: Fiat Model: 126 BIS Model Variant: BIS Applicable Years: 1987, 1988, 1989, 1990, 1991 Codes Chassis Code: Type 126 BIS 👋 Introduction Market Position Segment: Microcar / City Car Target Audience: Enthusiasts, DIY Mechanics, Owners seeking cost-effective maintenance and repair Competitive Analysis Competitors: Citroën Dyane, Renault 4, Mini (though larger), other European microcars of the era Key Features Design Philosophy: Compact, rear-engined, rear-wheel-drive, economical and simple construction Practicality: Surprisingly spacious interior for its size, hatchback practicality Heritage: Successor to the iconic Fiat 126, evolving the basic design for improved comfort and emissions 📋 Manual Details Coverage Areas Engine Overhaul: Complete Transmission Repair: Complete Electrical System: Comprehensive Body And Chassis: Full Repair Maintenance Procedures: All Scheduled and Unscheduld Diagnostic Troubleshooting: Detailed Fault Finding Suspension And Steering: Complete Service Braking System: Full Repair and Adjustment Heating And Ventilation: Service and Repair Interior Trim: Removal and Installation Page Count Estimated Pages: N/A (Downloadable, therefore variable based on printing) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Digital Format: Downloadable PDF Accessibility: Printable, Tablet Compatible, Smartphone Compatible 📖 Manual Coverage Systems Covered Engine: 126A.000, 126B.000 (Air-cooled, 2-cylinder, 650cc, OHV) Cooling System: Air Cooling System Components and Servicing Fuel System: Carburetor (Weber 28 IMB), Fuel Pump, Lines, Tank Ignition System: Distributor, Ignition Coil, Spark Plugs, Timing Transmission: 4-Speed Manual Synchromesh Clutch: Single Dry Plate, Hydraulic Actuation Drivetrain: Rear Wheel Drive, Differential Suspension: Independent Front (Transverse Leaf Spring), Independent Rear (Coil Springs and Trailing Arms) Steering: Rack and Pinion, Manual Brakes: Front Disc, Rear Drum, Hydraulic System, Parking Brake Electrical System: 12V System, Battery, Alternator, Starter Motor, Lighting, Wiper System, Horn Body And Chassis: Monocoque Construction, Doors, Hood, Trunk, Bumpers, Seals Heating And Ventilation: Internal Heater Core, Airflow Management Procedures Included Engine Maintenance: Valve Adjustment, Spark Plug Replacement, Carburetor Tuning, Oil Changes Engine Rebuilding: Piston Ring Replacement, Bearing Replacement, Cylinder Honing, Full Engine Disassembly and Assembly Transmission Overhaul: Gearbox Disassembly, Reassembly, Synchro Ring Replacement Clutch Replacement: Clutch Disc, Pressure Plate, Release Bearing Replacement Brake System Repair: Brake Pad/Shoe Replacement, Disc/Drum Machining or Replacement, Master Cylinder Rebuild, Bleeding Suspension Component Replacement: Ball Joint, Tie Rod, Bushing, Shock Absorber Replacement Electrical Component Testing: Alternator Output, Starter Draw, Light Functionality Body Panel Repair: Dent Removal, Rust Repair, Panel Replacement Wiring Diagrams: Full Electrical Schematics Troubleshooting Charts: Systematic Diagnostic Flows Technical Depth Depth: Comprehensive (From basic maintenance to full engine and transmission rebuilds, including electrical diagnostics and bodywork repair) 📊 Manual Specifications File Format Format: PDF Searchability: Text-searchable (assuming OCR processed) Print Quality Quality: High Quality (Designed for clear printing of text and diagrams) Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: 126A.000 (for earlier models of the BIS), 126B.000 (later BIS variants) Configuration: Air-cooled, 2-cylinder, Inline Displacement: 652 cc Bore X Stroke: 74 mm x 76 mm Compression Ratio: 8.25:1 Valve Train: Overhead Valve (OHV) with pushrods Performance Horsepower Ps: 26 PS (19 kW) at 4,800 rpm Torque Nm: 45 Nm (33 lb-ft) at 3,000 rpm Fuel System Carburetor: Weber 28 IMB (single barrel) Fuel Type: Unleaded Gasoline (historically, leaded gasoline was used) Lubrication Oil Capacity: 2.5 Liters (2.6 US Quarts) Oil Specification: API SG or higher, SAE 20W-50 recommended (check manual for precise modern equivalents) 🔧 Transmission Standard Type: 4-Speed Manual Synchromesh Optional Type: N/A (No automatic transmission option) Features Gear Ratios: Typical ratios: 1st: 3.818, 2nd: 2.353, 3rd: 1.452, 4th: 1.000, Reverse: 4.400 (Check manual for exact ratios) Fluid Capacity Gearbox Oil Capacity: 1.2 Liters (1.3 US Quarts) Fluid Specifications Gearbox Oil Type: API GL-4, SAE 75W-90 or 80W-90 (Check manual for precise specification) 📐 Dimensions Exterior Length: 3,050 mm (120.1 in) Width: 1,370 mm (53.9 in) Height: 1,395 mm (54.9 in) Wheelbase: 1,840 mm (72.4 in) Weights Curb Weight: Approx. 680 kg (1,499 lbs) Gross Vehicle Weight: Approx. 960 kg (2,116 lbs) Cargo Trunk Volume: Small, located in the front and under the rear seat 🛡️ Safety Features Ratings Crash Test Results: N/A (No modern standardized crash test data available for this era/segment) Active Features Braking System Type: Front Disc, Rear Drum Passive Features Seat Belts: Standard 3-point front belts, 2-point rear belts Body Construction: Unitary body with crumple zones (basic for the era) 💡 Technology Features Infotainment Radio: Optional (typically aftermarket or dealer-fitted) Speakers: Limited, usually 2 Driver Assistance Features: None beyond standard braking and steering systems Connectivity Features: N/A 🔧 Maintenance Service Intervals Engine Oil And Filter: Every 5,000 km (3,000 miles) or 6 months Spark Plugs: Every 10,000 km (6,000 miles) Air Filter: Every 10,000 km (6,000 miles), clean more frequently Valve Adjustment: Every 15,000 km (9,000 miles) Brake Fluid Flush: Every 2 years Transmission Fluid Change: Every 20,000 km (12,000 miles) or 12 months Fluid Specifications Coolant: N/A (Air-cooled engine) Brake Fluid:...