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1974 Cadillac Coupe deville

1974 Cadillac Coupe deville

For 1974, there were five models:

I. D. DATA

  • The serial number system and locations were the same as the previous year with sixth symbol changed to a "4" to indicate 1974 model year.
  • Calais were numbered 6C4( )R4Q 100001 and up
  • DeVilles 6D5( )R4( ) 10D001 and up
  • Eldorados 6L()S4Q( ) 400001 and up
  • Broughams 6B69R4Q 100001 and up
  • Seventy-Five 6F()R4Q100001 to 350000

ENGINE

DescriptionStandard EngineEldorado Engine
Engine typeV-8 Overhead valves. Cast iron blockV-8 Overhead valves
Main bearingsFiveFive
Valve liftersHydraulicHydraulic
Displacement472 cubic inches (7.7 litres)500 cubic inches (8.2 litres)
Bore and stroke4.300 x 4.060 inches
(109 x 103mm)		4.300 x 4.304
(109 x 109.3 mm)
Compression ratio8.25:18.25:1
Brake horsepower (net SAE)205 @ 4400 rpm210 @ 3600 rpm
Torque365 ft. lbs @ 2400 rpm380 ft. lbs. @ 2000 rpm
Oil pressure35 psi35 psi
CarburetorRochester four-barrel Quadrajet Model 4MV

SPECIFICATIONS

FLUID CAPACITIES

EngineV8 472cc (7.7L)V8 500cc (8.2L)
Crankcase4 qt5 qt
Crankcase with new filter5 qt6 qt
Automatic Transmission after draining8 pt11.9 pt
Drive Axle5 pt4 pt
Fuel tank27.5 gal(US)27.5 gal(US)
Cooling with heater21.3 qt21.3 qt
Cooling with A/C21.3 qt21.3 qt
Heavy duty Cooling23.8 qt21.8 qt

GASOLINE ENGINE TUNE-UP SPECS

Engine V.I.N CodeRSS
Engine typeV8-472cc(7.7L)V8-500cc(8.2L)V8-500cc(8.2L)
Fuel delivery4 bbl4 bbl4 bbl
ManufacturerCadillacCadillacCadillac
Original Spark plugR45NSR45NSR45NS
Gap0.035 in.0.035 in0.035 in
Distributor Point Dwell30°30°Electronic
Distributor Point Gap0.016"0.016"Electronic
Ignition timing (BTDC)10°10°10°
Intake valve opens (BTDC)212121
Fuel pump pressure5¼ to 6½ psi5¼ to 6½ psi5¼ to 6½ psi
Idle speed600/400 rpm600/400 rpm600/400 rpm

ALTERNATOR AND REGULATOR SPECS

Part #1100940110093711010151117144
Field current @ 12 V4.0 - 4.54.0 - 4.54.0 - 4.54.0 - 4.5
Output42 amps63 amps80 amps145 amps
Regulator Field-Relay: Air GapSolid StateSolid StateSolid StateSolid State
Regulator Field-Relay: Point Gap
Regulator Field-Relay: Volts to Close
Regulator Air Gap
Regulator Point Gap
Regulator Volts @ 75°13.8 - 14.813.5 - 14.413.8 - 14.813.5 - 14.4

BATTERY AND STARTER SPECS

EngineV8-472cc (7.7L)V8-500cc (8.2L)
Battery Ampere Hour Capacity7474
Battery Volts1212
Battery Terminal GroundedNeg.Neg.
Starter, Lock Test, AmpsNot RecommendedNot Recommended
Starter, Lock Test, Volts
Starter, Lock Test, Torque
Starter, No-Lead Test, Amps65 - 9565 - 95
Starter, No-Lead Test, Volts99
Starter, No-Lead Test, RPM7000 - 105007000 - 10500
Starter, Brush Spring Tension35 oz. min.35 oz. min.

GENERAL ENGINE SPECS

Engine V.I.N CodeRS
Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
ManufacturerCadillacCadillac
Fuel delivery4 bbl4 bbl
Horsepower220@4000210@3600
Torque365@2400380@2000
Bore x Stoke4.300 x 4.0604.300 x 4.304
Compression Ratio8.25:18.25:1
Oil pressure35 psi35 psi

CRANKSHAFT SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Main Brg Journal Dia.3.2503.250
Main Brg Oil Clearance0.0013 - 0.00260.0003 - 0.0026
Shaft End-play0.002 - 0.0120.002 - 0.012
Thrust on No.33

CONNECTING ROD SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Journal Dia.2.50002.5000
Oil Clearance0.0005 - 0.00280.0005 - 0.0028
Side Clearance0.011 - 0.0210.011 - 0.021

PISTON AND RING SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Piston-Bore Clearance0.0006 - 0.00100.0006 - 0.0010
Ring Side Clearance: Top Compression0.0017 - 0.00400.0017 - 0.0040
Ring Side Clearance: Bottom Compression0.0017 - 0.00400.0017 - 0.0040
Ring Side Clearance: Oil ControlNone (side sealing)None (side sealing)
Ring Gap: Top Compression0.013 - 0.0250.013 - 0.025
Ring Gap: Bottom Compression0.013 - 0.0250.013 - 0.025
Ring Gap: Oil Control0.015 - 0.0550.015 - 0.055

VALVE SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Seat Angle45°44°
Face Angle45°44°
Spring Test Pressure168 lb @ 1.50 in.168 lb @ 1.50 in.
Spring Installed Height115⁄16 in.115⁄16 in.
Stem-to-Guide Clearance: Intake0.0010 - 0.00270.0010 - 0.0027
Stem-to-Guide Clearance: Exhaust0.0016 - 0.00270.0012 - 0.0029
Stem Diameter: Intake0.34200.3418
Stem Diameter: Exhaust0.34180.3416

TORQUE SPECS

Engine typeV8-472cc(7.7L)V8-500cc(8.2L)
Cyl. Head Bolts115 ft.lb115 ft. lb
Rod Brg Bolts40 ft.lb40 ft. lb
Main Brg Bolts90 ft.lb90 ft. lb
Crankshaft Damper or Pulley BoltPress fitPress fit
Flywheel to Crankshaft Bolts75 ft.lb75 ft. lb
Intake Manifold30 ft.lb30 ft. lb
Exhaust Manifold35 ft.lb35 ft. lb

CARBURETOR SPECS

Carb ID7044230 (4MV)7044232 (4MV)7044530 (4MV)7044532 (4MV)7044234 (4MV)7044235 (4MV)7044233 (4MV)
Float Level1⁄4 in.23/64 in1⁄4 in.23/64 in1⁄4 in.23/64 in19/64 in
Air Valve Spring3/8 turn1/2 turn3/8 turn1/2 turn7/16 turn9/16 turn3/8 turn
Pump Rod1⁄4 in.1⁄4 in.1⁄4 in.1⁄4 in.11⁄32 in.11⁄32 in.11⁄32 in.
Primary Vacuum Break0.185 in0.200 in0.185 in0.200 in0.185 in0.200 in0.185 in
Choke Rod0.110 in0.110 in0.110 in0.110 in0.110 in0.110 in0.110 in
Choke Unloader0.312 in0.312 in0.312 in0.312 in0.312 in0.312 in0.312 in
Fast Idle Speed1400 rpm1400 rpm1400 rpm1400 rpm1400 rpm1400 rpm1400 rpm

WHEEL ALIGNMENT SPECS

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 Inclination11° 6°

HISTORICAL NOTES

1974 Cadillac Notes

  • Model introductions took place on September 16, 1973.
  • Model year production hit 242,330 cars.
  • All U.S. auto sales were off this season, as a side affect of the Arab oil embargo.
  • Because of this, Cadillac's lower production level was still sufficient to pull down a greater market share.
  • Robert D. Lund was general manager until November
  • Edward C. Kennard became general manager in November
  • Robert J. Templin was chief engineer
  • Stanley Wilen was chief designer (Cadillac Studio) until September
  • Wayne Kady became chief designer (Cadillac Studio) in September
  • F. T. Hopkins was general sales manager
  • Cadillac production figures
Calais6,883 (decreased 1,190)
Sedan de Ville60,419 (decreased 42,975)
Coupe de Ville112,201 (decreased 648)
Eldorado40,412 (decreased 11,039)
Series 6018,250 (decreased 6,550)
Series 754,165 (decreased 107)