🏷️ Basic Information Identification Make: Chevrolet Model: Corvette Model Designation: C3 (Third Generation) Year: 1975 Engine Code: LS4 (454 cu in) Codes Vin Engine Prefix: Z 👋 Introduction Market Position Vehicle Segment: American Sports Car / Grand Tourer Competitive Analysis Competitors 1975: Porsche 911, Jaguar E-Type (though fading), high-performance muscle cars with sporting pretensions. Key Features Performance Focus: Emphasis on V8 power, particularly the large-displacement 454 Big Block. Styling: Iconic C3 'Mako Shark' styling, still highly desirable. Manual Value Proposition: Essential for owners undertaking maintenance, restoration, or repair of this classic performance vehicle. 📋 Manual Details Coverage Areas General Coverage: Complete factory service and repair procedures for 1975 Chevrolet Corvette with 454 cubic inch engine. Page Count Estimated Page Count: Hundreds of pages (printable in entirety or selectively) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, assembly, overhaul, timing, lubrication, cooling system. Fuel System: Fuel tank, fuel pump, fuel lines, carburetor (Quadrajet 4-barrel), emissions control system. Electrical System: Battery, charging system (alternator), starting system (starter), ignition system (distributor, coil, spark plugs), lighting, gauges, wiring diagrams. Transmission: Manual and automatic transmission service, overhaul, adjustments, fluid specifications. Drivetrain: Clutch, driveshaft, universal joints, rear axle assembly, differential, half-shafts. Suspension: Front suspension (independent, unequal length A-arms, coil springs), rear suspension (independent, trailing arms, transverse leaf spring), shock absorbers, stabilizer bars. Steering: Steering gear (recirculating ball), power steering system, steering column, linkages. Brakes: Front disc brakes (power assisted), rear disc brakes (power assisted), parking brake, hydraulic system, specifications, bleeding procedures. Body And Frame: Chassis construction, body panels, doors, windows, convertible top, interior trim, seals. Heating And Air Conditioning: HVAC system diagnosis and repair, refrigerant, components. Emissions Control: PCV system, exhaust gas recirculation (EGR), catalytic converter, onboard diagnostic (OBD) principles for the era. Procedures Included Maintenance: Scheduled maintenance, lubrication, fluid changes, filter replacements, tune-ups. Troubleshooting: Diagnostic charts, symptom identification, step-by-step troubleshooting guides for common issues. Repair And Overhaul: Detailed disassembly, inspection, repair, and reassembly procedures for all major components. Diagnostic Procedures: Engine performance diagnosis, electrical system testing, brake system diagnostics. Technical Specifications: Torque specifications, clearances, tolerances, alignment specifications, electrical resistance values. Wiring Diagrams: Comprehensive and clearly labeled electrical wiring schematics. Technical Depth Depth: Comprehensive; covers everything from basic maintenance to complete engine and transmission rebuilds, electrical system diagnostics, and body repairs. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality Printability: High-resolution scans of original factory documentation, suitable for printing individual pages or the entire manual. Binding Type Binding Type: N/A (Digital download) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Overhead Valve (OHV) V8 Displacement: 454 cubic inches (7.4 Liters) Bore X Stroke: 4.25 in x 4.00 in Compression Ratio: 8.5:1 (for unleaded fuel compatibility) Horsepower Net SAE: 270 hp @ 4,000 rpm Torque Net SAE: 380 lb-ft @ 3,200 rpm Fuel System Fuel Delivery: Rochester Quadrajet 4-barrel carburetor Fuel Type: Unleaded gasoline (regular and premium grades specified in manual) Emissions Catalytic Converter: Yes (standard equipment for 1975) 🔧 Transmission Standard Transmission Type: M20 4-speed manual or Turbo Hydra-Matic 400 (THM400) 3-speed automatic. Optional Transmission Type: THM400 automatic was optional. Features Manual Gear Ratios: Specific ratios for M20 (e.g., 2.52, 1.85, 1.43, 1.00, R: 2.52) detailed in manual. Automatic Features: Torque converter, hydraulic control, specific fluid type (Dexron). Fluid Specifications Manual Transmission Fluid: GL-4 gear oil (e.g., SAE 90) Automatic Transmission Fluid: Dexron II 📐 Dimensions Exterior Length: 177.3 inches Width: 69.0 inches Height: 47.8 inches (Coupe) Wheelbase: 98.0 inches Weights Curb Weight Approx: 3,600 - 3,800 lbs (depending on options) 🛡️ Safety Features Ratings NHTSA Ratings: N/A (As NHTSA ratings were not standardized or published in the same manner as today) Active Features Brakes: Four-wheel disc brakes (power assisted). Steering: Power steering (standard on 454 models). Passive Features Seat Belts: Three-point lap and shoulder belts (standard). Rollover Protection: Reinforced windshield frame and integral roll bar behind seats (coupe). 💡 Technology Features Infotainment Audio System: AM/FM radio (optional), often with 8-track tape player or cassette as dealer options. Driver Assistance Cruise Control: Optional feature. Connectivity Connectivity Features: N/A (This era predates modern electronic connectivity features). 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual; typically 3,000-5,000 miles or 6 months for this era. Tune Up Interval: Refer to manual; typically 10,000-20,000 miles, including spark plugs, points (if applicable), and carburetor adjustment. Fluid Specifications Engine Oil Capacity Filter: 5 quarts (including filter) of SAE 10W-30 or 10W-40 (check manual for specific viscosity and API service classification). Coolant Capacity: Approximately 22 quarts (water/antifreeze mixture). Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Power Steering Fluid: Dexron II automatic transmission fluid. Known Issues Common Maintenance Items: Carburetor adjustment, ignition system (points, condenser, plugs), vacuum leaks, cooling system integrity, U-joint...