Third Edition 1970-72 Corvette Technical Information Manual & Judging Guide Index
Index INTERIOR Page 3 1. Upholstery and Seat Belts Page 5 1.1. Vinyl Upholstery Page 5 1.2. Custom (Leather) Upholstery Page 5 1.3. Seat Backs and Seat Adjusting Hardware Page 5 1.4. Lap and Shoulder Belts Page 6 1.5. Safety Belt Date Codes Page 6 2. Carpets Page 7 2.1. Carpets Page 7 2.2. Heel and Dimmer Switch Pad Page 8 3. Door Panels, Inside Door Hardware (Release, cranks, knobs, & trim), Kick Panels & Rear Quarter Panels Page 8 3.1. Door Panels Page 8 3.2. Door Hardware Page 8 3.3. Kick Panels Page 8 3.4. Rear Quarter Trim Panels Page 9 4. Dash Panel, Pads, Map Pocket & Center Bezel Page 9 4.1. Dash Panel and Pads Page 9 4.2. Map Pocket Page 9 4.3. Center Metal Cluster Page 9 5. Steering Wheel, Horn Button & Steering Column Page 10 5.1. Steering Wheel Page 10 5.2. Horn Button & Turn Signal Lever Page 10 5.3. Standard Column Page 10 5.4. Tilt-Telescopic Column Page 11 6. Instruments & Radio Page 11 6.1. Instruments Page 11 6.2. Radio Page 12 7. Console, Shift Boot & Ashtray Page 13 7.1. Console Page 13 7.2. Shift Boot Page 14 7.3. Ashtray Page 14 8. Transmission Shifter & Knob Page 14 9. Under Dash Area Page 14 10. Pedals Page 15 10.1. Accelerator Pedal Page 15 10.2. Brake Pedal Page 15 11. Rear Storage Compartments & Jack Page 16 11.1. Rear Storage Compartments Page 16 11.2. Center Storage Compartment Page 16 11.3. Passenger s side Storage Compartment Page 16 11.4. Fiber Board Tray & Contents Page 16
11.5. Onwer s Packet Page 16 11.6. Removable Top Panel Storage Bags Page 17 11.7. Compartment Lock Page 17 11.8. Rear Storage Area Lamp Page 17 11.9. Rear Window Storage Tray Page 17 11.10. Top Panel Hold Down Straps Page 17 12. Battery and Caps Page 18 12.1. Battery Page 18 12.2. Battery Caps Page 18 13. Battery Cables & Bolts Page 18 14. Convertible Top Inside of Hardtop Headliner or Coupe Tops Page 19 14.1. Convertible Top Interior Page 19 14.2. Convertible Top Bows Page 19 14.3. Removable Hardtop Headliner Page 19 14.4. Convertible Deck Lid Page 19 14.5. Coupe Interior Trim Panels Page 19 15. Sun Visors, Windshield Garnish Molding and Interior Rearview Mirror Page 20 15.1. Sun Visors Page 20 15.2. Windshield Garnish Molding Page 20 15.3. Interior Rear View Mirror Page 20 16. Knobs and Pulls Page 21 16.1. Headlamp knobs Page 21 16.2. Windshield wiper/washer switch knob Page 21 16.3. Rear window defogger knob Page 21 16.4. Radio knobs Page 21 16.5. Heater / air conditioning controls Page 21 16.6. Console mounted fresh air vent controls Page 21 16.7. Cigar lighter Page 21 16.8. Parking brake lever Page 22 16.9. Dash mounted fresh air vents and controls Page 22 16.10. Hood release Page 22 16.11. Headlamp, wiper arms, wiper cover override and trip odometer rest knob Page 22 17. Overall Cleanliness Page 22
EXTERIOR / TOP Page 23 1. Body Paint & Trim Plate Page 23 1.1. Corvette Final Monthly Serial Numbers Page 24 2. Body Color Page 24 2.1. Special and Primer jobs Page 24 2.2. Exterior Color Codes Page 25 3. Body Paint Page 25 3.1. LT1 Hood Stripes Page 25 4. Body, Fiberglass and Component Fit Page 27 4.1. Rust on Body Frame Page 28 4.2. Fiberglass Fit Page 28 4.3. Luggage Rack Page 28 5. Front and Rear Bumpers Page 28 5.1. Bumbers Page 28 6. Parking and Side Marker Lamps & Lenses Page 28 7. Front Grilles, License Bracket, Grille Guards & Headlamp Shields Page 29 7.1. Front Grilles Page 29 7.2. Front License Bracket Page 29 7.3. Grille Guards Page 30 7.4. Headlamp Shields Page 30 8. Headlamps and Bezel Page 30 8.1. Headlamps Page 30 8.2. Headlamp Bezel Page 30 9. Hood, Windshield Vent Grille & Windshield Wiper Door Page 31 9.1. Windshield Vent Grille & Wiper Door Page 31 10. WIPER Arms, Blades and Windshield Stainless Steel Trim Page 32 10.1. Wiper Arms and Blades Page 32 10.2. Wiper Transmission and Actuating Rods Page 32 10.3. Windshield Stainless Steel Trim Page 32 11. Windshield Page 32 12. Side & Back Window Page 33 12.1. Side Windows Page 33 12.2. Convertible Rear Window Page 34 13. Side Fender Grilles Page 35 13.1. Side Fender Grilles Page 35 14. Outside Rear View Mirror, Door Handles and Locks Page 35 14.1. Outside Rear View Mirror Page 35 14.2. Right Hand Mirror Page 36 14.3. Door Handles Page 36 14.4. Door Lock Bezel Page 36
15. Keys Page 36 15.1. Square and Round Head Keys Page 36 15.2. Lock Keyways Page 36 15.3. Alarm Key and Lock Page 37 15.4. Key and Lock Judging Procedure Page 37 16. Door & Body Jambs, Sills, Weatherstripping & Hinges Page 37 16.1. Door & Body Jambs Page 37 16.2. Door Striker Bolt Page 38 16.3. Door Sills Page 38 16.4. Door Weatherstripping Page 38 16.5. Blue Certification Label Page 38 16.6. Canadian Transport Sticker Page 38 16.7. Door Hinges Page 39 17. Antenna Page 39 18. Gas Lid Door, Gas Cap, Rubber Boot and Rear Deck Vent Grilles Page 39 18.1. Gas Lid Door Page 39 18.2. Gas Cap Page 40 18.3. Rubber Boot & Drain Page 41 18.4. Rear Deck Vent Grilles Page 41 19. License Recess, Tail Lamps and Audio Alarm Page 41 19.1. License Recess Page 41 19.2. License Frames Page 41 19.3. Tail & Back-up Lamps Page 41 19.4. Audio Alarm Page 42 20. Emblems Page 43 20.1. Crossed Flags & CORVETTE letters Page 43 20.2. Stingray Page 43 20.3. 454 Page 43 20.4. LT1 Page 43 21. Top Page 43 21.1. Auxiliary Hardtop Page 43 21.2. Convertible Top Page 44 21.3. Removable Hardtop Panels Page 44 22. Wheels and Wheel Covers Page 44 22.1. Wheel Paint Page 44 22.2. Wheel Balance Weights Page 45 22.3. Trim Rings and Center Caps Page 45 22.4. Full Wheel Cover Page 45 22.5. Valve Stems and Valve Stem Extensions Page 45 23. Tires Page 46 23.1. Radial Replacement Tires Page 46 24. Spare Wheel, Tire Lock and Boot Page 47 24.1. Spare Wheel Page 47 24.2. Wheel Date Codes Page 47 24.3. Spare Tire Lock and Boot Page 47 25. Overall Cleanliness Page 47
MECHANICAL Page 48 1. Cylinder Case Page 48 1.1. Casting Number Page 48 1.2. Casting Date Page 48 1.3. Stamped Information Page 48 2. Cylinder Heads Page 51 3. Valve Covers & Oil Fill Cap Page 52 3.1. Small Block Valve Covers Page 52 3.2. Big Block Valve Covers Page 52 3.3. Positive Crankcase Ventilation (PCV) Valve and Hoses Page 53 3.4. Oil Cap Page 53 3.5. Engine Suffix Code Label Page 53 4. Air Cleaner Page 53 4.1. Air Cleaner & Labeling Page 53 4.2. Air Filter Element Page 54 5. Carburetor Page 54 6. Thermostatic Choke Stove Page 57 7. Intake Manifold Page 58 7.1. Engine Lifting Hardware Page 59 7.2. Intake Manifold Gaskets, Fasteners and Vacuum Fitting Page 59 8. Delco Remy Distributor, Coil, Bracket, Pulse Amplifier and Timing Cap Page 60 8.1. RFI Shield Page 60 8.2. Distributor Cap Page 61 8.3. Coil Page 61 8.4. Coil Support Page 61 8.5. Transistor Ignition Page 61 8.6. Timing Tab Page 61 9. Exhaust Manifolds Page 62 9.1. Date Code Page 63 9.2. Air Injection Reactor Fittings Page 63 9.3. Exhaust Manifold Fasteners Page 63 10. Ignition Shielding Page 64 10.1. Small Motor Page 64 10.2. Mark IV Engines Page 64 10.3. Radio Delete Page 65 10.4. Spark Plug Wires Page 65 10.5. Spark Plugs Page 65 11. Oil Dipstick Page 67 12. Alternator, Power Steering, Brackets & Pulleys Page 67 12.1. Alternator Broadcast Code Page 67 12.2. Alternator & Power Steering Pulleys Page 68 12.3. Alternator Brackets Page 68 12.4. Power Steering Brackets Page 68
12.5. Power Steering Pump Page 68 13. Fuel Pump Page 69 14. Lack of External Fuel Filter Page 69 15. Fuel Lines & Vacuum Advance Lines Page 69 15.1. Fuel Line Page 69 15.2. Vacuum Advance Lines 1970 and 1972 Page 69 15.3. Vacuum Advance Lines 1971 Page 70 15.4. Vacuum Advance Fitting, Holley Equipped 1970 to 1972 Page 70 16. Emissions Label Page 70 16.1. Canadian Export Label Page 71 17. Brake Master Cylinder & Power Booster Page 72 17.1. Master Cylinder Page 72 17.2. Master Cylinder Cover Page 72 17.3. Power Brake Booster Page 72 18. A.I.R. and Other Emission Controls Page 72 18.1. AIR System Page 72 18.2. AIR Required Vehicles Page 73 18.3. Air Injection Pump Page 73 18.4. Pump Mounting Hardware Page 74 18.5. Diverter Valve Page 74 18.6. AIR Hoses and Clamps Page 75 18.7. Check Valves Page 75 18.8. Manifold Trees Page 75 18.9. Evaporative Control System Page 75 18.10. Transmission Controlled Spark or Combined Emissions Control Page 76 18.11. Anti-diesel Solenoid (1972 only) Page 77 19. Oil Pan Page 77 20. Engine Color Page 77 20.1. Intake Manifold Page 78 20.2. Exhaust Manifold Page 78 20.3. Orange Supports Page 78 20.4. Bell Housing Page 78 21. Air Conditioning System and Blower Motor Page 78 21.1. Compressor Page 78 21.2. Hoses Page 79 21.3. Thermostatic Expansion Valve Page 79 21.4. Pilot Operated Absolute (POA) Valve Page 79 21.5. Housing and Fan Relay Page 80 21.6. Water Shut Off Valve and Air Conditioning Motor Page 80 21.7. Blower Motor Page 80 22. Water Pump, Pulleys, Belts, Fan Clutch, Fan, Coolant Hoses, Clamps and Thermostat Housing Page 80 22.1. Water Pump Page 80 22.2. Water Pump and Crankshaft Pulleys Page 81 22.3. Harmonic Damper Page 81 22.4. Belts Page 81
22.5. Fan Clutch Page 81 22.6. Fan Page 81 22.7. Thermostat Housing Page 82 22.8. Radiator Hoses Page 82 22.9. Radiator Hose Clamps Page 83 22.10. Heater Hoses Page 83 22.11. Heater Hose Clamps Page 84 23. Windshield Washer Components, Wiper Motor, Wiper Door, Door Actuator, Linkage and Vacuum Valve Page 84 23.1. Washer Fluid Reservoir Page 84 23.2. Wiper Door Linkage and Limit Switch Page 85 23.3. Vacuum Actuator and Valve Page 85 23.4. Wiper Motor, Washer Pump and Hoses Page 85 23.5. Headlamp Washer System Page 86 24. Engine Compartments Color, Fire Wall, Hood Hinges, Latches, Support and Inner Skirts Page 86 24.1. Engine Compartment Color Page 86 24.2. Hood Underside Page 86 24.3. Hood Hinges Page 86 24.4. Hood Support Page 86 24.5. Hood Latches Page 87 24.6. Fire Wall, including Oil Pressure Line and Tachometer Cable Page 87 24.7. Inner Fender Skirts, Seals and Dust Shields Page 88 25. Horn Relay & Wiring Page 88 25.1. Underhood Wiring Page 88 25.2. UA6 Alarm Wiring Page 89 25.3. Horn Relay Page 89 26. Vacuum Color Coded Hoses Page 90 26.1. Vacuum Color Coded Hoses Page 90 27. Overall Cleanliness Page 90
CHASSIS Page 91 1. Radiator Support, Condenser, Dryer, Radiator, Shroud, Expansion Tank & Radiator Cap Page 91 1.1. Radiator (Core) Support Page 91 1.2. Condenser & Dryer Page 91 1.3. Radiator Page 91 1.4. Radiator Shroud Page 91 1.5. Expansion Tank Page 92 1.6. Expansion Tank to Radiator Hose Page 92 1.7. Radiator Cap Page 93 2. Horns, Headlamp Actuators & Area Behind Grille Page 93 2.1. Horns Page 93 2.2. Headlamp Actuators Page 93 2.3. Area Behind Grille Page 94 3. Front Bumper Brackets, Mounting Hardware, Valance & Extension Page 94 3.1. Front Bumper Brackets & Mounting Hardware Page 94 3.2. Front Valance Page 95 3.3. Extension (Spoiler) Page 95 4. Starter, Solenoid, and Heat Shield Page 95 4.1. Delco Remy Starter Page 95 4.2. Solenoid and Heat Shield Page 96 5. Oil Filter Page 96 6. Exhaust System, Heat Riser Valve & Tail Pipes Page 97 6.1. Exhaust Pipes and Heat Riser Valve Page 97 6.2. Clamps and Hanger Brackets Page 97 6.3. Mufflers Page 98 6.4. Tail Pipe (Exhaust Tip) Page 98 7. Rocker Moldings Page 99 7.1. Rocker Moldings Page 99 8. Suspension Components & Shock Absorbers Page 100 8.1. Front Springs Page 100 8.2. Front Suspension Page 100 8.3. Front Stabilizer Shaft Page 100 8.4. Steering Linkage Page 101 8.5. Power Steering Page 101 8.6. Brake Calipers and Hoses Page 101 8.7. Brake Backing Plates and Caliper Mounts Page 101 8.8. Shock Absorbers Page 101 8.9. Rear Spring Page 102 8.10. Rear Strut Rods Page 102 8.11. Rear Stabilizer Shaft Page 102 8.12. Axle Shafts and Universal Joints Page 102 8.13. Frame and Suspension Finish Chart Page 103 9. Frame and Undercarriage Page 104 9.1. Frame Page 104 9.2. Engine Mounts Page 104
9.3. Clutch Cross Shaft and Boot Page 104 9.4. Ground Straps Page 104 9.5. Steering Shaft and Box Page 105 9.6. Automatic Transmission Coolant Lines Page 105 9.7. Transmissions Page 105 9.8. 4-Speed Page 105 9.9. Turbo Hydra-matic 400 Page 105 9.10. Underbody Heat Shields Page 106 9.11. Underbody Sheet Metal Panels Page 106 9.12. Underbody Fiberglass Page 106 9.13. Seat Belt Anchors Page 106 9.14. Fuel and Brake Lines and Parking Brake Cables Page 107 9.15. Differential Page 107 9.16. Drive Shaft Page 108 9.17. Rear Toe Shims Page 108 9.18. Rear Camber Adjusting Mechamism Page 109 9.19. Gas Tank and Sending Unit Page 109 9.20. Rear & Front Stabilizer Shaft Frame Brackets Page 109 9.21. Front Alignment Shims Page 109 9.22. Upper Inner Control Arm Shaft and Bushings Page 109 9.23. Body to Frame Cushions Page 109 10. Wheel Wells and Splash Pan Area Page 111 11. Spare Tire Carrier Page 111 12. Rear Bumper Brackets Page 111 12.1. Rear Bumper Brackets Page 111 13. Exhaust Bezels and Rear Valance Page 111 13.1. Exhaust Bezels Page 111 13.2. Rear Valance Page 111 14. Overall Cleanliness Page 112