1971 Cadillac Coupe de Ville
Model year production was curtailed by labor disputes and peaked at 188,537 units. The new models were introduced September 29, 1970. For the first time ever, Cadillac built cars outside of Detroit, Michigan. Some 1971 Coupe and Sedan DeVilles were built at a GM Assembly Division (GMAD) factory in Linden, New Jersey. Sales, for calendar 1971, hit a new high of 267,868 units. Hints of a forthcoming downsized Cadillac line were heard in Detroit.
1971 Cadillac Coupe de Ville
For 1971, there were five models: Calais (two-door hardtop coupe and four-door hardtop sedan), DeVille (two-door coupe and four-door hardtop sedan), Fleetwood Sixty-Special (four-door brougham), Fleetwood Seventy-five (four-door sedan, four-door limousine, and commercial chassis used in hearses and ambulances, etc.), and Fleetwood Eldorado (two-door hardtop coupe and two-door convertible)
| Model | Wheelbase | Overall length | Tires |
|---|---|---|---|
| Commercial chassis | 4001mm | - | L-78 x 15 |
| Seventy-Five | 3848mm | 6281mm | |
| Sixty-special | 3378mm | 5812mm | |
| Eldorado | 3208mm | 5629mm | |
| All others | 3302mm | 5735mm |
| Engine | V8 472cc (7.7L) | V8 500cc (8.2L) |
| Crankcase | 4 or 5 qt | 5 qt |
| Crankcase with new filter | 5 or 6 qt | 6 qt |
| AutomaticTransmission after draining | 25 or 26 pt | 26 pt |
| Drive Axle | 5 or 4.5 pt | 4.5 pt |
| Fuel tank | 26 gal(US) | 24 gal(US) |
| Cooling with heater | 21 qt | 20 qt |
| Cooling with A/C | 21 qt | 20 qt |
| Heavy duty Cooling | 25 qt | 22 qt |
| Engine V.I.N Code | R | S |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Fuel delivery | 4 bbl | 4 bbl |
| Manufacturer | Cadillac | Cadillac |
| Original Spark plug | R46N | R46N |
| Gap | 0.035 in. | 0.035 in |
| Distributor Point Dwell | 30° | 30° |
| Distributor Point Gap | 0.016" | 0.016" |
| Ignition timing (BTDC) | 8° | 7½° |
| Intake valve opens (BTDC) | 18 | 18 |
| Fuel pump pressure | 6 psi | 6 psi |
| Idle speed | 600 rpm | 600 rpm |
| Part # | 1100911 | 1100908 | 1100694 | 1117144 |
| Field current @ 12 V | 2.2 - 2.6 | 2.2 - 2.6 | 2.8 - 3.2 | 4.0 - 4.5 |
| Output | 42 amps | 55 amps | 63 amps | 145 amps |
| Regulator Field-Relay: Air Gap | 0.015" | 0.015" | Solid State | Solid State |
| Regulator Field-Relay: Point Gap | 0.030" | 0.030" | ||
| Regulator Field-Relay: Volts to Close | 1.5 - 3.2 | 1.5 - 3.2 | ||
| Regulator Air Gap | 0.060" | 0.060" | ||
| Regulator Point Gap | 0.014" | 0.014" | ||
| Regulator Volts @ 75° | 13.5 - 14.4 | 13.5 - 14.4 | 13.8 - 14.8 | 13.5 - 14.4 |
| Engine | V8-472cc (7.7L) | V8-500cc (8.2L) |
| Battery Ampere Hour Capacity | 74 | 74 |
| Battery Volts | 12 | 12 |
| Battery Terminal Grounded | Neg. | Neg. |
| Starter, Lock Test, Amps | Not Recommended | Not Recommended |
| Starter, Lock Test, Volts | ||
| Starter, Lock Test, Torque | ||
| Starter, No-Lead Test, Amps | 70 - 99 | 70 - 99 |
| Starter, No-Lead Test, Volts | 9 | 9 |
| Starter, No-Lead Test, RPM | 7800 | 7800 |
| Starter, Brush Spring Tension | 35 oz. min. | 35 oz. min. |
| Engine V.I.N Code | R | S |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Manufacturer | Cadillac | Cadillac |
| Fuel delivery | 4 bbl | 4 bbl |
| Horsepower | 375@4400 | 365@4400 |
| Torque | 525@3000 | 535@2800 |
| Bore x Stoke | 4.300 x 4.060 | 4.300 x 4.304 |
| Compression Ratio | 8.8:1 | 8.5:1 |
| Oil pressure | 35 - 40 psi | 35 - 40 psi |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Main Brg Journal Dia. | 3.250 | 3.250 |
| Main Brg Oil Clearance | 0.0003 - 0.0026 | 0.0003 - 0.0026 |
| Shaft End-play | 0.002 - 0.012 | 0.002 - 0.012 |
| Thrust on No. | 3 | 3 |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Journal Dia. | 2.5000 | 2.5000 |
| Oil Clearance | 0.0005 - 0.0028 | 0.0005 - 0.0028 |
| Side Clearance | 0.008 - 0.016 | 0.008 - 0.016 |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Piston-Bore Clearance | 0.0006 - 0.0010 | 0.0006 - 0.0010 |
| Ring Side Clearance: Top Compression | 0.0017 - 0.0040 | 0.0017 - 0.0040 |
| Ring Side Clearance: Bottom Compression | 0.0017 - 0.0040 | 0.0017 - 0.0040 |
| Ring Side Clearance: Oil Control | None (side sealing) | None (side sealing) |
| Ring Gap: Top Compression | 0.013 - 0.025 | 0.013 - 0.025 |
| Ring Gap: Bottom Compression | 0.013 - 0.025 | 0.013 - 0.025 |
| Ring Gap: Oil Control | 0.015 - 0.055 | 0.015 - 0.055 |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Seat Angle | 45° | 44° |
| Face Angle | 45° | 44° |
| Spring Test Pressure | 160 lb @ 1.50 in. | 160 lb @ 1.50 in. |
| Spring Installed Height | 115⁄16 in. (1.671875") | 115⁄16 in. (1.9375") |
| Stem-to-Guide Clearance: Intake | 0.0005 - 0.0025 | 0.0005 - 0.0025 |
| Stem-to-Guide Clearance: Exhaust | 0.0010 - 0.0025 | 0.0010 - 0.0025 |
| Stem Diameter: Intake | 0.3415 - 0.3425 | 0.3415 - 0.3425 |
| Stem Diameter: Exhaust | 0.3415 - 0.3420 | 0.3415 - 0.3420 |
| Engine type | V8-472cc(7.7L) | V8-500cc(8.2L) |
| Cyl. Head Bolts | 115 ft.lb | 115 ft. lb |
| Rod Brg Bolts | 40 ft.lb | 40 ft. lb |
| Main Brg Bolts | 90 ft.lb | 90 ft. lb |
| Crankshaft Damper or Pulley Bolt | Press fit | Press fit |
| Flywheel to Crankshaft Bolts | 75 ft.lb | 75 ft. lb |
| Intake Manifold | 30 ft.lb | 30 ft. lb |
| Exhaust Manifold | 35 ft.lb | 35 ft. lb |
| Carb ID | 7041777 (4MV) | 7041766 (4MV) |
| Float Level | 11⁄32 in. | 1⁄4 in. |
| Pump Rod | 11⁄32 in. | 11⁄32 in. |
| Choke Unloader | 0.300 in | 0.300 in |
| Fast Idle Speed | 1925 rpm | 1925 rpm |
| Feature | Eldorado | Full size |
| Caster Range | ½°N - 1½°N | 1½°N - ½°N |
| Caster Pref. | 1°N | 1°N |
| Camber LH wheel Range | 3⁄8°N - 3⁄8°P | 3⁄8°P - 3⁄8°N |
| Camber LH wheel Pref. | 0° | 0° |
| Camber RH wheel Range | 3⁄8°N - 3⁄8°P | 1/8°P - 5/8°N |
| Camber RH wheel Pref. | 0° | ¼°N |
| Toe-In | 0" | 1⁄8 in. - 1⁄4 in. |
| Steering Axis Inclination | 11° | 6° |
1971 Cadillac Notes
1970