🏷️ Basic Information Identification Make: Chevrolet Model: Corvette Year: 1981 Engine Variant: 350 Cubic Inch V8 Codes Vin Code Engine: H 👋 Introduction Market Position Positioning: Essential diagnostic and repair resource for C3 Corvette owners and mechanics Competitive Analysis Comparison: Often considered the 'bible' for this generation of Corvette, superior to generalized repair guides Key Features Features: Detailed factory procedures, torque specifications, wiring diagrams, diagnostic flowcharts 📋 Manual Details Coverage Areas Trim Levels: All Models Engine Types: All Engine Types Transmission Types: All Transmission Types Page Count Estimated Page Count: 1000+ Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, emissions control Transmission: Automatic (THM350) and Manual transmissions (Laboratories), clutch system Drivetrain: Driveshaft, rear axle, differential Suspension: Front and rear suspension, steering system Brakes: Front disc brakes, rear disc brakes, parking brake, hydraulic system Electrical: Wiring diagrams, charging system, starting system, lighting, instruments, accessories, power windows, power seats Body: Body and frame construction, interior trim, exterior trim, doors, windows, seats, bumpers HVAC: Heating, ventilation, and air conditioning (HVAC) system Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-ups Troubleshooting: Diagnostic charts, common problems and solutions Repair: Component removal, installation, overhaul, and adjustment procedures Diagnostics: Engine performance diagnostics, electrical system troubleshooting Technical Depth Depth: Comprehensive from basic maintenance to major overhauls and diagnostics 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (typically for professional PDFs) Printable: Yes Print Quality Quality: High-resolution scans for clear diagrams and text Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: V8 Displacement: 350 cu in (5.7 L) Block Material: Cast Iron Cylinder Head Material: Cast Iron Bore X Stroke: 4.00 in x 3.48 in (101.6 mm x 88.4 mm) Compression Ratio: 8.2:1 Performance Horsepower Net SAE: 190 hp @ 4500 rpm Torque Net SAE: 285 lb-ft @ 2400 rpm Fuel System Fuel Delivery: Rochester Quadra-Jet 4-barrel carburetor Fuel Type: Unleaded gasoline (87 octane recommended) Ignition System Ignition Type: Electronic Spark Control (ESC) with knock sensor, Breakerless Electronic Ignition (for some models/markets) 🔧 Transmission Standard Transmission Type: Turbo Hydramatic 350 (THM350) 3-speed automatic Optional Transmission Type: Optional 4-speed manual (Muncie SM465 or BorgWarner T-10 variations existed in earlier C3s, but less common by '81. The manual for '81 primarily focuses on the automatic) Features Transmission Fluid Type: Dexron III Automatic Transmission Fluid (ATF) 📐 Dimensions Exterior Wheelbase: 98.0 inches (2489 mm) Length: 185.8 inches (4719 mm) Width: 70.5 inches (1791 mm) Height: 47.9 inches (1217 mm) Weights Curb Weight: Approx. 3,450 - 3,550 lbs (1565 - 1610 kg) Gross Vehicle Weight Rating Gvwr: Approx. 4,400 lbs (1996 kg) 🛡️ Safety Features Ratings NHTSA Overall Rating: Not rated by NHTSA under modern standards Active Features Braking System: Power-assisted front and rear disc brakes Steering System: Power steering Passive Features Restraints: Seat belts (lap and shoulder belts) Body Structure: Reinforced frame and body construction 💡 Technology Features Infotainment Audio System: AM/FM stereo radio, optional cassette player, power antenna Driver Assistance Features: Power steering, power brakes, cruise control (optional) Connectivity Features: N/A (pre-digital era) 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 miles or 6 months (depending on driving conditions) Transmission Fluid Change: Every 30,000-50,000 miles Coolant Flush: Every 2 years or 30,000 miles Fluid Specifications Engine Oil Type: API SF, SAE 10W-30 or 10W-40 recommended Engine Oil Capacity: 5 US quarts (4.7 liters) with filter Coolant Type: Ethylene Glycol (Green) Brake Fluid Type: DOT 3 Known Issues Common Problems: Carburetor tuning and adjustment, vacuum leaks, aging electrical components, fiberglass delamination (rare), clutch wear (manual), transmission hard shifts (automatic). Emissions Controls: ECS system, catalytic converter, EGR valve require regular maintenance and potential replacement. 📚 Vehicle History Brand Heritage Heritage: Continuation of the iconic Chevrolet Corvette lineage, America's Sports Car Model Evolution Generation: Third Generation (C3) - 1968-1982 Year Specific Changes: 1981 saw updated emissions controls, revised suspension tuning, and a move towards all-Corvette assembly in Bowling Green, Kentucky. Offered in Coupe and Convertible body styles. Production Production Location: Bowling Green, Kentucky, USA Production Volume 1981: 40,606 units 🏆 Awards & Recognition Recognitions Iconic Status: Recognized as a significant model in Corvette's C3 era and a desirable classic sports car. Ratings Classic Car Value: Consistently holds value as a classic collectible, appreciating with good condition and originality. Certifications Manual Quality: Certified professional quality, aligned with factory service manual standards.